Squashed 'vim/bundle/javascript/' changes from e9a59c877..d2ccd306f

d2ccd306f use generic equivalent
3ea6ed6ac Trim optimize (#1024)
c03aee798 add 'mjs' extension (#1023)
c5e5e2012 refactor, mergeable (#1018)
dcb4e4762 cleaning, small optimization? (#1015)
7097cdad8 Small Flow return fix
739562910 more simplify of PCL (#1013)
8ea46f3e6 neater/faster iterating
6ccc1a713 Fix certain flow annotations within classes
fc80419fd trivial indent fixes / updates (#1007)
09d7c7051 faster/smaller cache access, SynId function (#1005)
7175ba5e6 missed a condition last time
ff851de60 improve conditionals all over (#1002)
37a68c3c7 Add fold to various flow regions
dd1f74fb8 Another quick flow patch
bc5b02484 A few more fixes
008e98985 Trying out some flow tweaks
e4870b4f5 More fixes for flow
0353342bc Fix for jsFlowOperator
243932e58 A ton of flow fixes
ff5e284f4 exponentiator, operator things (#1001)
f0ce7ffa9 cino-W (#1000)
cc84aa380 Merge pull request #999 from wavded/patch-2
ef74079e9 Add @async tag support.
603ec7156 cleaning, indent (#997)
be46c1c4d document and improve class cases (#996)
9b2a032c3 fix list size error with setpos()
7684f3cfc magic
1bd80e092 edge case fix: prevcodeline() and c style comments (#994)
72f4a95b2 fix for `[*` failing
43097941a let [] =[], minor formatting (#990)
aba8630e2 Making jsModuleGroup foldable
517d37c97 Merge pull request #992 from pangloss/async-fix
97203f192 async/await should be an @jsExpression
ebc6fd267 fix expr_col case
14cf98883 remove semicolon flag; flow (#989)
e0472fc50 indent file cleaning (#988)
4eac815fa cleaner searcpair workaround
e6f514324 IsCont trivial refactor (#986)
efd4f1f5e Small fix for Flow class annotations
8d6fbfb41 lex type import (#984)
f20659188 small logic reversal
438990878 date, cleaning
271f73123 clean up Syn
e14cfb6a0 flowtype requiring (#982)
2b0889fa8 naturalize (#981)
0b44edb6f Pcodeline (#980)
868c15b1c non-interrupting limit info in debugging
42c9451ab more lookbehind needed... classes
1cb44af82 make var naming consistent (#977)
6f880fe81 fix for non-inheriting (#976)
4e3c3c0d6 small logic fix
e5cdee7b2 assure switch isn't method (#974)
931dbd5b6 cino-M (#971)
a5a9a17d4 add possible ident shorthand (#970)
7ba092739 cleaner generator shorthand fix (#969)
2dfe7cded star shorthand workaround
9ea6e5df1 date
388c9cbc4 Nat is unary
147e50669 remove script-global, range reversal, max (#965)
18cd99029 cino-star behavior; remove s:W references
e092e7fce star comment find, as loop (#963)
eb5f00f67 Small fix for jsTaggedTemplate
beba61e8e trivial reading stuff and date
1d28953b1 clearer -1 check
28281d25a simplify isBlock and doWhile (#962)
4242a4b5f remove function setup
2e24d89cc fix wording
f5f32a9f4 Update README.md
bb2c6857d cino-= and misc style changes: indent.vim (#959)
89c3d920e variable of current token in functions (#958)
21a8a7ed8 misc:refactor (#957)
dc0bb4748 cleaning: indent.vim (#956)
d3068263e date
d9820f993 remove comment hack
5f0163963 no eval or confusing viml workarounds (#954)
e73b32207 deduplication (#953)
809b6beb4 move state out of try block
82b142242 test fix (#952)
9ce4ea852 misc: go back to l:pos only when needed; (#947)
d12dc6156 just use dict value
18c2c847e Merge pull request #925 from pangloss/issue-template
d33561172 Improve issue template
7d8a2b117 Adding an ISSUE_TEMPLATE.md
a898a9780 Merge pull request #942 from pangloss/bounceme-patch-1
c8aa5ed52 fix wrong func call
244985f10 don't use cursor() in conditional
573879c9d Reuse pos restorer, misc cleaning (#943)
0c26c4808 fix #940: ternary expression returning arrow
81166acad cache synID calls (#938)
a1f36ff79 move s: vars
5b2f56d75 Fix buffer variables inited only once (#941)
65dbdfc45 Fix variable typo (#939)
f7ffea095 Misc: indent (#937)
896bb54d2 configurable syntax skipping (#936)
53b043924 misc: indent.vim (#935)
259f5282f (silent) exception same as within searchpair (#934)
1e59f8488 break at html too
fcdacf6f7 break search at col:1 (#933)
ac71ceca3 another str2nr()
45d092f65 str2nr() to prevent octal
e573aa0b6 unneeded var declare (#932)
317125e18 &cino non-regex (#931)
2bca9c6f6 misc fixes, non-critical stuff (#929)
10492a89d cino-U (#928)
145fdc76d script-tag var access (#927)
3c2923e43 dont depend on loop error handling
2c8733ed7 vim script minify (#924)
021a5ff80 simpler, float less, cino parse (#926)
5511721b1 compiler header
23f5d0ed1 update comments
0d7ad9320 better do -> while "switch"
1a7a8fc8d no pos movement, exit correctly in prevline()
d8729f221 string detecting for prevline()
a327247d1 add note
ceae62037 Merge pull request #921 from pangloss/fix-prototype
ff9918c7c Fix prototype matching
431aa0ed1 Merge pull request #920 from pangloss/add-await-js-expression
5e85c21d0 Adding await to @jsExpression
665501ba2 various indent cleanups (#917)
55651ba6d add "es" extension (#916)
b6c00a194 move flow detect to ft detect file (#913)
f786167f9 Merge pull request #912 from sebcode/master
0cc170159 Allow flowtype annotation for arrow func return val
c87bb4345 auto load flow file with comment header (#911)
8fb55c5be minor change to limit
9cbe46c4a limit expr_col
b954ab478 ternary assignment
4e64bcff9 cleaner limiting in html
bea0e2096 change buffer variable for html
3ca2f636d fix, keep cache valid in tag
10f71931a don't move to scriptTag
87ecc8742 fix html without pangloss repo syntax file (#909)
ac4efdca0 indenting for first line after script tag (#908)
1e4ec0aaf also disregard flow bracket as operator
8e51618ba fix embedded js (#907)
63355ea70 fix: add jsImport and jsExport to htmlJavaScript (#906)
3530116b5 builtin optimization, fail condition (#904)
d2bc31992 more pattern simplifications (#903)
fac43e7d2 explicit match of cino parse (#902)
a24f345f4 dot isblock
90cf82a9f Remove a call to trim() in Onescope (#900)
afe6b8bf2 do while; experiment (#899)
0034e332b strpart instead of substrings,date (#898)
d87476f30 simplify balance optimization (#897)
289eca381 use search() 'e' flag to simplify regex
015004855 case
4a442bade virtual (#894)
669262388 replace tabs shell comment
e79107b49 add small note about testing in shell (#890)
2ad6da791 small code style fixes
1f9e29243 Onescope() refining (#889)
688d34b2e fix type as identifier (#887)
a2259d32b flow type ob (#886)
5ff6d5071 more prevcodeline improving (#884)
6c2007980 small fix
6007c680e refactor Prevcodeline (#883)
d8ffdf71e remove extra func call
867f50038 remove eval in continues() (#881)
95405f8e3 shiftwidth() compat (#879)
d79de5b4f expr_col switch? (#878)
a35306e0a save_pos instead of try/finally , date (#877)
40c437fd1 reimplement Trim() (#876)
6be84aa6b alternating balanced() (#874)
f92f5814e use float support rather than reimplement it (#873)
44b70ce73 remove pointless format flag (#872)
1ad5378d6 cleaning (#870)
c3892c40a reverse logic,skipfunc (#869)
57c837045 regex in token (#868)
b99793534 optimization in alternatepair() (#867)
0f36d47e8 make search magic
6fad4c536 document cino-w
73a8a137d cino-w (#864)
eb0465274 more c-parse fixes
ab5f29eee safe list value
6968e93e3 cino-parsing helper (#862)
5824735cd cino-b (#861)
c07c72700 unneeded condition
d1b6d908d safer check for paren/cino
4b219f6c9 doc
6c0bd6505 cino=( (#860)
53c547bbb extends, isBlock
4dc80ee25 regex explicit case
203126dae remove quote inaccuracy
05e17e4d4 if ptoken fails, restore cursor (#858)
23e5fa204 fix jsx detection (#857)
f70263dc6 clean up continues() (#856)
51e0cc54f more likely condition first (#855)
3344f1388 more keywords/operators (#854)
7072eb54a new operator
97a8ab46e cino option
220ce28ee reduce if nesting, isBlock consistency (#853)
6e8811c32 Enabling spell checking on template strings (#834)
e3a0e1f55 ternary algorithm simplified
c63905600 regex case fixes (#850)
3bb778ee7 faster tern col regex (#849)
9cf48ee3d string group name
18bc58a02 refactor isBlock (#846)
38c2b557b full syntax check if inside jsx (#844)
742f55bf1 syn related indent fixes (#843)
545ab1a90 Merge pull request #842 from pangloss/misc-bugfixes
5c526adcb Fixes to some comment chaining
1f1d5ebf3 unicode regex flag (#840)
d993dda7d Merge pull request #838 from pangloss/bugfix/js-func-call
994b78bf7 Fix for jsFuncCall
871ab2959 prevent octal conversion (#835)
9ada8ab92 switch_offset min value (#832)
8d0d45349 template inner code (#830)
b7677c924 float-less cino parsing (#828)
307eb850d better zero char solution
bf2f6a8e4 do inc/dec/arrow detection in function (#827)
2195ce010 safer GetPair condition (#824)
432d01b2d Merge pull request #823 from pangloss/ret
c354c479e Merge pull request #822 from qstrahl/fix-js-class-value-arrow-function
1ec994774 shorten final return
8b55755e9 Remove keepend from jsClassValue region
4e1ec95dc fix
9d24edb47 accurate Trim and prev_token funcs (#817)
8526ce56e Merge pull request #814 from pangloss/feature/js-object-prop
019e523aa combine ind logic (#816)
67b90c737 First pass at `jsObjectProp`
3cf8f3d0b Merge pull request #801 from pangloss/feature/new-bind-syntax
22c7e7b3e jsBlockLabels are not allowed if ::
7c95ee824 First pas at :: support
9f3ecf459 Merge pull request #815 from pangloss/jstemplateexpression
88c85d9ea Renaming jsTemplateVar -> jsTemplateExpression
690f23ea8 fix for inc/dec operators and blocks (#811)
18cbb4bde cleaning (#810)
0367cb5d5 add compiler plugin (#808)
f54c861a8 remove search call (#809)
96a5b5ec6 remove z flag
53dea7aff cleaning,search flags (#807)
56f6fbbe4 improve regex at skip_func (#806)
f8e9c1a7f check for lines which contain at least 2 `/` (#804)
cfaa6e4ef Merge pull request #789 from wavded/patch-1
7050c3ad9 Merge pull request #802 from pangloss/bugfix/template-var-keepend
cb7d5aeae Attempted fix for jsTemplateVar
ce415c397 Merge pull request #778 from pangloss/feature/block-support
9148cd38d Add extend to jsTernaryIf
659cbf3de Fix switch cases from being detected as labels
f11f948c0 Adding support for block statement labels
4839870f2 Fix jsTernaryIf and jsObjects
fe92d4991 First pass at Block support
9e9e2c4f3 remove added s:Trim arg
bd9b70af0 remove html comment
faa1a4bf4 cleaning (#799)
685219245 Fix Function capitalization in Flow annotations
b3a1e8a87 add await
d817bd4f1 re-add throw
bba35b25c change a keyword
58fdba82d cleaning
3ee5de406 fix keywords
043bb4aa0 fix destruct
dce5a10a0 remove check of keyword
2f182a1f4 generic search function (#795)
0b9c46e46 remove flow cases
006f889b4 exact object indent (#793)
2c44678d3 Merge pull request #791 from pangloss/fix-empty-arrow-args
d8a6fef99 Bugfix for jsArrowFuncArgs
aa3a16993 various fixes (#790)
17bbd02c1 ternary function (#788)
ff1fc56de Improve @typedef syntax for namepath.
ad3261e92 magic portability (#786)
a584a283b Merge pull request #787 from pangloss/add-comments-to-destructuring-blocks
364309983 Adding jsComment to destructuring blocks
8e3ae21c3 fix case block logic
36ebd9f8a rename,refactor, jump label support for isblock() (#775)
c2f65cd3f Merge pull request #782 from pangloss/fix-async
1a7632e6c Fixing how async is used
2f8d1fe2e Merge pull request #781 from pangloss/misc-flow-tweaks
7cb3abf71 Misc flow fixes
799274716 Merge pull request #780 from pangloss/flow-fix
ddefa30d1 Adding Flow wildcard support
3ef7bfd18 Merge pull request #779 from pangloss/misc-bugfixes
431e22926 Fix require in jsGlobalNodeObjects
c347e2da1 Adds __dirname & __filename to jsGlobalNodeObjects
f60eb29ea Merge pull request #777 from pangloss/bugfix/add-spread-to-jsblock
6f01baa66 Adding jsSpreadExpression to jsBlock
28732ef1a Merge pull request #776 from pangloss/bugfix/js-class-value
c12ae7609 An attempted fix for jsClassValue region end
521f4eda7 jump label support (#772)
a6176945c add other comments
8043c4bc0 detect string, prevline (#771)
ccc9f3017 improvements to prevcodeline() (#769)
da1eee445 odd comments, shebang (#768)
ce0f529bb refactor s:OneScope() (#766)
1cb6f1094 cleaner loop (#765)
f33b9ed81 cleaning, edge case with keyword (#764)
117c72721 more edge case accuracy,refactoring (#761)
294563c61 &cino format
63daab731 better &cino parsing (#759)
8e17e2330 Detect .es6 files as JavaScript (#199)
25cff858e don't move cursor at default label
3583822da reflow comment
4149f1d30 cleaning continued braceless statement (#758)
9db487d00 add option in s:prev_token() (#757)
1a17ce8c6 Merge pull request #756 from pangloss/array-destructuring-default-value-support
0dd9ad3b4 Fix array destructuring as func arg definitions
0bf390d9c optimize indent with basic syntax file (#753)
afecff2b5 v:lnum cleaning
3cc3ef7c1 cleaning (#751)
e80725868 Revert "match isk in token regex" (#750)
82f064a12 match isk in token regex (#749)
039c611e1 refactor v:lnum cleaning (#748)
d81b076b5 make regex for token() more intuitive (#746)
a210f3916 fix code comment
554ae9b24 package-manager info (#744)
d377f45bd regex simplified in trim() (#745)
d2bc5d49e remove conditional
9e0aa00b6 clarify readme
ba9501bfc markdown fixes
41a3bceb4 more readme fixes
df14847ad fix readme
9f4772175 Added conceal for no-argument arrow functions - either `()=>` or `_=>` (#735)
6d81ec817 only Trim() if in a block (#743)
66b25d97c Indent: use previous Trim, with new interface (#741)
14919946c date, code documenting
7ceb23304 misc indent changes (#739)
982f699de small optimization (#738)
1bc948137 date, minor regex
c1d4b3b07 keywords used as props (#737)
25ceb5578 cleaning, Rework prevcodeline() (#736)
edf962fb5 Merge pull request #734 from pangloss/fix-flow-import-type
3dd27d631 Adding support for Flow type imports
18ff935c9 optimization: no continuation at block start (#733)
8265877f7 indentkeys (#732)
1801887f2 operator cleaning (#729)
5e024dc2e Merge pull request #731 from pangloss/refactor-import-export
66f120cb0 Improve default handling
3873adbff Completely refactored how import/export work
894e26d85 Merge pull request #727 from pangloss/fix-import-region
91b0a0da0 Fix end pattern for import region
c92a0cad8 paren start line as baseline in blocks (#725)
a87c94438 unneeded token call (#722)
209b57f9d remove dead code, rename function, date (#721)
ae9324a61 improve ptoken (#719)
bac863e62 Merge pull request #718 from pangloss/fix-spread-in-brackets
3efcf3111 Adds jsSpreadExpression to jsBracket
7b9c64f15 Merge pull request #717 from pangloss/improve-class-definition
b18c6b88a Basic improvement to jsClassDefinition
f4245c4f7 more correct comment match (#714)
737c23845 faster prevline (#713)
b8c62023d add operators, regex experiment (#711)
540d3a572 improve regex for s:Trim (#710)
b3b85e34b trim from start of comment sequence (#709)
f177220eb regex prettify
bbabf9d67 syntax aware previous token (#705)
c938b83e2 Update README.md (#702)
22b9f0f8e consider regex when matching '/' (#703)

git-subtree-dir: vim/bundle/javascript
git-subtree-split: d2ccd306f2c11f061c5284ff5d315c7cf257e32a

CONTRIBUTING.md

@@ -1,18 +0,0 @@
-## Contributing
-
-This project uses the [git
-flow](http://nvie.com/posts/a-successful-git-branching-model/) model for
-development. There's [a handy git module for git
-flow](//github.com/nvie/gitflow). If you'd like to be added as a contributor,
-the price of admission is 1 pull request. Please follow the general code style
-guides (read the code) and in your pull request explain the reason for the
-proposed change and how it is valuable.
-
-## Pull Requests
-
-Please make your pull requests against the `develop` branch; we stage changes
-for testing there to avoid unexpected breakages for our users. :)
-
-## Bug report
-
-Report a bug on [GitHub Issues](https://github.com/pangloss/vim-javascript/issues).

ISSUE_TEMPLATE.md

@@ -0,0 +1,12 @@
+If you are reporting an issue that involves any JSX (e.g.
+<div>{`${example}`}</div>), PLEASE PLEASE PLEASE make sure you have properly
+setup and are sourcing this plugin https://github.com/mxw/vim-jsx
+
+WE DO NOT support JSX automatically, you need another plugin to add get this
+functionality.
+
+If applicable, include a snippet of code that we can easily copy and paste that
+replicates your bug.
+
+Make sure the bug still exists if you disable all other javascript plugins
+except the one noted above, mxw/vim-jsx

README.md

@@ -6,32 +6,12 @@ improved indentation.
 
 ## Installation
 
-### Install with [Vundle](https://github.com/gmarik/vundle)
-
-Add to vimrc:
-
-    Plugin 'pangloss/vim-javascript'
-
-And install it:
-
-    :so ~/.vimrc
-    :PluginInstall
-
-### Install with [vim-plug](https://github.com/junegunn/vim-plug)
-
-Add to vimrc:
-
-    Plug 'pangloss/vim-javascript'
-
-And install it:
-
-    :so ~/.vimrc
-    :PlugInstall
-
 ### Install with [pathogen](https://github.com/tpope/vim-pathogen)
 
       git clone https://github.com/pangloss/vim-javascript.git ~/.vim/bundle/vim-javascript
 
+alternatively, use a package manager like [vim-plug](https://github.com/junegunn/vim-plug)
+
 
 ## Configuration Variables
 
@@ -83,38 +63,53 @@ global vim option, we do not set it ourselves.
 
 ## Concealing Characters
 
-You can customize concealing characters by defining one or more of the following
+You can customize concealing characters, if your font provides the glyph you want, by defining one or more of the following
 variables:
 
-    let g:javascript_conceal_function       = "ƒ"
-    let g:javascript_conceal_null           = "ø"
-    let g:javascript_conceal_this           = "@"
-    let g:javascript_conceal_return         = "⇚"
-    let g:javascript_conceal_undefined      = "¿"
-    let g:javascript_conceal_NaN            = "ℕ"
-    let g:javascript_conceal_prototype      = "¶"
-    let g:javascript_conceal_static         = "•"
-    let g:javascript_conceal_super          = "Ω"
-    let g:javascript_conceal_arrow_function = "⇒"
+    let g:javascript_conceal_function             = "ƒ"
+    let g:javascript_conceal_null                 = "ø"
+    let g:javascript_conceal_this                 = "@"
+    let g:javascript_conceal_return               = "⇚"
+    let g:javascript_conceal_undefined            = "¿"
+    let g:javascript_conceal_NaN                  = "ℕ"
+    let g:javascript_conceal_prototype            = "¶"
+    let g:javascript_conceal_static               = "•"
+    let g:javascript_conceal_super                = "Ω"
+    let g:javascript_conceal_arrow_function       = "⇒"
+    let g:javascript_conceal_noarg_arrow_function = "🞅"
+    let g:javascript_conceal_underscore_arrow_function = "🞅"
+
+
+You can enable concealing within VIM with:
+
+    set conceallevel=1
+
+OR if you wish to toggle concealing you may wish to bind a command such as the following which will map `<LEADER>l` (leader is usually the `\` key) to toggling conceal mode:
+
+    map <leader>l :exec &conceallevel ? "set conceallevel=0" : "set conceallevel=1"<CR>
+
 
 ## Indentation Specific
 
 * `:h cino-:`
+* `:h cino-=`
+* `:h cino-star`
+* `:h cino-(`
+* `:h cino-w`
+* `:h cino-W`
+* `:h cino-U`
+* `:h cino-m`
+* `:h cino-M`
+* `:h 'indentkeys'`
 
 ## Contributing
 
-This project uses the [git
-flow](http://nvie.com/posts/a-successful-git-branching-model/) model for
-development. There's [a handy git module for git
-flow](//github.com/nvie/gitflow). If you'd like to be added as a contributor,
-the price of admission is 1 pull request. Please follow the general code style
+Please follow the general code style
 guides (read the code) and in your pull request explain the reason for the
-proposed change and how it is valuable.
-
-
-## Bug Reports
+proposed change and how it is valuable. All p.r.'s will be reviewed by a
+maintainer(s) then, hopefully, merged.
 
-Report a bug on [GitHub Issues](https://github.com/pangloss/vim-javascript/issues).
+Thank you!
 
 
 ## License

compiler/eslint.vim

@@ -0,0 +1,16 @@
+" Vim compiler plugin
+" Language:     JavaScript
+" Maintainer:   vim-javascript community
+" URL:          https://github.com/pangloss/vim-javascript
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "eslint"
+
+if exists(":CompilerSet") != 2
+  command! -nargs=* CompilerSet setlocal <args>
+endif
+
+CompilerSet makeprg=eslint\ -f\ compact\ %
+CompilerSet errorformat=%f:\ line\ %l\\,\ col\ %c\\,\ %m

extras/flow.vim

@@ -1,33 +1,38 @@
 syntax region  jsFlowDefinition     contained                        start=/:/    end=/\%(\s*[,=;)\n]\)\@=/ contains=@jsFlowCluster containedin=jsParen
 syntax region  jsFlowArgumentDef    contained                        start=/:/    end=/\%(\s*[,)]\|=>\@!\)\@=/ contains=@jsFlowCluster
-syntax region  jsFlowArray          contained matchgroup=jsFlowNoise start=/\[/   end=/\]/        contains=@jsFlowCluster
-syntax region  jsFlowObject         contained matchgroup=jsFlowNoise start=/{/    end=/}/         contains=@jsFlowCluster
-syntax region  jsFlowParens         contained matchgroup=jsFlowNoise start=/(/  end=/)/ contains=@jsFlowCluster
+syntax region  jsFlowArray          contained matchgroup=jsFlowNoise start=/\[/   end=/\]/        contains=@jsFlowCluster,jsComment fold
+syntax region  jsFlowObject         contained matchgroup=jsFlowNoise start=/{/    end=/}/         contains=@jsFlowCluster,jsComment fold
+syntax region  jsFlowExactObject    contained matchgroup=jsFlowNoise start=/{|/   end=/|}/       contains=@jsFlowCluster,jsComment fold
+syntax region  jsFlowParens         contained matchgroup=jsFlowNoise start=/(/  end=/)/ contains=@jsFlowCluster keepend fold
 syntax match   jsFlowNoise          contained /[:;,<>]/
-syntax keyword jsFlowType           contained boolean number string null void any mixed JSON array function object array bool class
+syntax keyword jsFlowType           contained boolean number string null void any mixed JSON array Function object array bool class
 syntax keyword jsFlowTypeof         contained typeof skipempty skipempty nextgroup=jsFlowTypeCustom,jsFlowType
 syntax match   jsFlowTypeCustom     contained /[0-9a-zA-Z_.]*/ skipwhite skipempty nextgroup=jsFlowGroup
 syntax region  jsFlowGroup          contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster
 syntax region  jsFlowArrowArguments contained matchgroup=jsFlowNoise start=/(/  end=/)\%(\s*=>\)\@=/ oneline skipwhite skipempty nextgroup=jsFlowArrow contains=@jsFlowCluster
 syntax match   jsFlowArrow          contained /=>/ skipwhite skipempty nextgroup=jsFlowType,jsFlowTypeCustom,jsFlowParens
-syntax match   jsFlowMaybe          contained /?/ skipwhite skipempty nextgroup=jsFlowType,jsFlowTypeCustom,jsFlowParens,jsFlowArrowArguments
 syntax match   jsFlowObjectKey      contained /[0-9a-zA-Z_$?]*\(\s*:\)\@=/ contains=jsFunctionKey,jsFlowMaybe skipwhite skipempty nextgroup=jsObjectValue containedin=jsObject
 syntax match   jsFlowOrOperator     contained /|/ skipwhite skipempty nextgroup=@jsFlowCluster
+syntax keyword jsFlowImportType     contained type skipwhite skipempty nextgroup=jsModuleAsterisk,jsModuleKeyword,jsModuleGroup
+syntax match   jsFlowWildcard       contained /*/
 
-syntax match   jsFlowReturn         contained /:\s*/ contains=jsFlowNoise skipwhite skipempty nextgroup=@jsFlowReturnCluster
-syntax region  jsFlowReturnObject   contained matchgroup=jsFlowNoise start=/{/    end=/}/  contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp
-syntax region  jsFlowReturnArray    contained matchgroup=jsFlowNoise start=/\[/   end=/\]/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp
-syntax region  jsFlowReturnParens   contained matchgroup=jsFlowNoise start=/(/    end=/)/  contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp
+syntax match   jsFlowReturn         contained /:\s*/ contains=jsFlowNoise skipwhite skipempty nextgroup=@jsFlowReturnCluster,jsFlowArrow,jsFlowReturnParens
+syntax region  jsFlowReturnObject   contained matchgroup=jsFlowNoise start=/{/    end=/}/  contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp fold
+syntax region  jsFlowReturnArray    contained matchgroup=jsFlowNoise start=/\[/   end=/\]/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp fold
+syntax region  jsFlowReturnParens   contained matchgroup=jsFlowNoise start=/(/    end=/)/  contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp,jsFlowReturnArrow fold
+syntax match   jsFlowReturnArrow    contained /=>/ skipwhite skipempty nextgroup=@jsFlowReturnCluster
 syntax match   jsFlowReturnKeyword  contained /\k\+/ contains=jsFlowType,jsFlowTypeCustom skipwhite skipempty nextgroup=jsFlowReturnGroup,jsFuncBlock,jsFlowReturnOrOp
-syntax match   jsFlowReturnMaybe    contained /?/ skipwhite skipempty nextgroup=jsFlowReturnKeyword
+syntax match   jsFlowReturnMaybe    contained /?/ skipwhite skipempty nextgroup=jsFlowReturnKeyword,jsFlowReturnObject
 syntax region  jsFlowReturnGroup    contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp
 syntax match   jsFlowReturnOrOp     contained /\s*|\s*/ skipwhite skipempty nextgroup=@jsFlowReturnCluster
+syntax match   jsFlowWildcardReturn contained /*/ skipwhite skipempty nextgroup=jsFuncBlock
 
 syntax region  jsFlowFunctionGroup  contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncArgs
 syntax region  jsFlowClassGroup     contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsClassBlock
 
-syntax region  jsFlowTypeStatement                                   start=/type/    end=/=\@=/ contains=jsFlowTypeOperator oneline skipwhite skipempty nextgroup=jsFlowTypeValue keepend
-syntax region  jsFlowTypeValue      contained                        start=/=/       end=/[;\n]/ contains=@jsExpression,jsFlowGroup,jsFlowMaybe
+syntax region  jsFlowTypeStatement                                   start=/type\%(\s\+\k\)\@=/    end=/=\@=/ contains=jsFlowTypeOperator oneline skipwhite skipempty nextgroup=jsFlowTypeValue keepend
+syntax region  jsFlowTypeValue      contained     matchgroup=jsFlowNoise start=/=/       end=/[\n;]/ contains=@jsFlowCluster,jsFlowGroup,jsFlowMaybe
+syntax match   jsFlowTypeOperator   contained /=/ containedin=jsFlowTypeValue
 syntax match   jsFlowTypeOperator   contained /=/
 syntax keyword jsFlowTypeKeyword    contained type
 
@@ -37,12 +42,18 @@ syntax region  jsFlowClassDef       contained start=/:/    end=/\%(\s*[,=;)\n]\)
 
 syntax region  jsFlowModule         contained start=/module/ end=/{\@=/ skipempty skipempty nextgroup=jsFlowDeclareBlock contains=jsString
 syntax region  jsFlowInterface      contained start=/interface/ end=/{\@=/ skipempty skipempty nextgroup=jsFlowInterfaceBlock contains=@jsFlowCluster
-syntax region  jsFlowDeclareBlock   contained matchgroup=jsFlowNoise start=/{/ end=/}/ contains=jsFlowDeclare,jsFlowNoise
+syntax region  jsFlowDeclareBlock   contained matchgroup=jsFlowNoise start=/{/ end=/}/ contains=jsFlowDeclare,jsFlowNoise fold
 
-syntax region jsFlowInterfaceBlock  contained matchgroup=jsFlowNoise start=/{/ end=/}/ contains=jsObjectKey,jsObjectKeyString,jsObjectKeyComputed,jsObjectSeparator,jsObjectFuncName,jsObjectMethodType,jsGenerator,jsComment,jsObjectStringKey,jsSpreadExpression,jsFlowNoise keepend
+" NOTE: It appears the nextgroup was causing a ton of breakages... testing it
+" witout a nextgroup, but keeping this arround for reference incase something breaks
+" syntax match   jsFlowMaybe          contained /?/ nextgroup=jsFlowType,jsFlowTypeCustom,jsFlowParens,jsFlowArrowArguments,jsFlowObject,jsFlowReturnObject extend keepend
+syntax match   jsFlowMaybe          contained /?/
+syntax region  jsFlowInterfaceBlock contained matchgroup=jsFlowNoise start=/{/ end=/}/ contains=jsObjectKey,jsObjectKeyString,jsObjectKeyComputed,jsObjectSeparator,jsObjectFuncName,jsObjectMethodType,jsGenerator,jsComment,jsObjectStringKey,jsSpreadExpression,jsFlowNoise keepend fold
 
-syntax cluster jsFlowReturnCluster            contains=jsFlowNoise,jsFlowReturnObject,jsFlowReturnArray,jsFlowReturnKeyword,jsFlowReturnGroup,jsFlowReturnMaybe,jsFlowReturnOrOp
-syntax cluster jsFlowCluster                  contains=jsFlowArray,jsFlowObject,jsFlowNoise,jsFlowTypeof,jsFlowType,jsFlowGroup,jsFlowArrowArguments,jsFlowMaybe,jsFlowParens,jsFlowOrOperator
+syntax region  jsFlowParenAnnotation contained start=/:/ end=/[,=)]\@=/ containedin=jsParen contains=@jsFlowCluster
+
+syntax cluster jsFlowReturnCluster            contains=jsFlowNoise,jsFlowReturnObject,jsFlowReturnArray,jsFlowReturnKeyword,jsFlowReturnGroup,jsFlowReturnMaybe,jsFlowReturnOrOp,jsFlowWildcardReturn,jsFlowReturnArrow
+syntax cluster jsFlowCluster                  contains=jsFlowArray,jsFlowObject,jsFlowExactObject,jsFlowNoise,jsFlowTypeof,jsFlowType,jsFlowGroup,jsFlowArrowArguments,jsFlowMaybe,jsFlowParens,jsFlowOrOperator,jsFlowWildcard
 
 if version >= 508 || !exists("did_javascript_syn_inits")
   if version < 508
@@ -59,9 +70,11 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsFlowTypeof             PreProc
   HiLink jsFlowArray              PreProc
   HiLink jsFlowObject             PreProc
+  HiLink jsFlowExactObject        PreProc
   HiLink jsFlowParens             PreProc
   HiLink jsFlowGroup              PreProc
   HiLink jsFlowReturn             PreProc
+  HiLink jsFlowParenAnnotation    PreProc
   HiLink jsFlowReturnObject       jsFlowReturn
   HiLink jsFlowReturnArray        jsFlowArray
   HiLink jsFlowReturnParens       jsFlowParens
@@ -70,9 +83,10 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsFlowClassGroup         PreProc
   HiLink jsFlowArrowArguments     PreProc
   HiLink jsFlowArrow              PreProc
+  HiLink jsFlowReturnArrow        PreProc
   HiLink jsFlowTypeStatement      PreProc
   HiLink jsFlowTypeKeyword        PreProc
-  HiLink jsFlowTypeOperator       PreProc
+  HiLink jsFlowTypeOperator       Operator
   HiLink jsFlowMaybe              PreProc
   HiLink jsFlowReturnMaybe        PreProc
   HiLink jsFlowClassProperty      jsClassProperty
@@ -81,7 +95,11 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsFlowInterface          PreProc
   HiLink jsFlowNoise              Noise
   HiLink jsFlowObjectKey          jsObjectKey
-  HiLink jsFlowOrOperator         PreProc
+  HiLink jsFlowOrOperator         jsOperator
   HiLink jsFlowReturnOrOp         jsFlowOrOperator
+  HiLink jsFlowWildcard           PreProc
+  HiLink jsFlowWildcardReturn     PreProc
+  HiLink jsFlowImportType         PreProc
+  HiLink jsFlowTypeValue          PreProc
   delcommand HiLink
 endif

extras/jsdoc.vim

@@ -4,13 +4,13 @@ syntax region jsComment    matchgroup=jsComment start="/\*\s*"  end="\*/" contai
 " tags containing a param
 syntax match  jsDocTags         contained "@\(alias\|api\|augments\|borrows\|class\|constructs\|default\|defaultvalue\|emits\|exception\|exports\|extends\|fires\|kind\|link\|listens\|member\|member[oO]f\|mixes\|module\|name\|namespace\|requires\|template\|throws\|var\|variation\|version\)\>" skipwhite nextgroup=jsDocParam
 " tags containing type and param
-syntax match  jsDocTags         contained "@\(arg\|argument\|cfg\|param\|property\|prop\)\>" skipwhite nextgroup=jsDocType
+syntax match  jsDocTags         contained "@\(arg\|argument\|cfg\|param\|property\|prop\|typedef\)\>" skipwhite nextgroup=jsDocType
 " tags containing type but no param
-syntax match  jsDocTags         contained "@\(callback\|define\|enum\|external\|implements\|this\|type\|typedef\|return\|returns\)\>" skipwhite nextgroup=jsDocTypeNoParam
+syntax match  jsDocTags         contained "@\(callback\|define\|enum\|external\|implements\|this\|type\|return\|returns\)\>" skipwhite nextgroup=jsDocTypeNoParam
 " tags containing references
 syntax match  jsDocTags         contained "@\(lends\|see\|tutorial\)\>" skipwhite nextgroup=jsDocSeeTag
 " other tags (no extra syntax)
-syntax match  jsDocTags         contained "@\(abstract\|access\|accessor\|author\|classdesc\|constant\|const\|constructor\|copyright\|deprecated\|desc\|description\|dict\|event\|example\|file\|file[oO]verview\|final\|function\|global\|ignore\|inheritDoc\|inner\|instance\|interface\|license\|localdoc\|method\|mixin\|nosideeffects\|override\|overview\|preserve\|private\|protected\|public\|readonly\|since\|static\|struct\|todo\|summary\|undocumented\|virtual\)\>"
+syntax match  jsDocTags         contained "@\(abstract\|access\|accessor\|async\|author\|classdesc\|constant\|const\|constructor\|copyright\|deprecated\|desc\|description\|dict\|event\|example\|file\|file[oO]verview\|final\|function\|global\|ignore\|inheritDoc\|inner\|instance\|interface\|license\|localdoc\|method\|mixin\|nosideeffects\|override\|overview\|preserve\|private\|protected\|public\|readonly\|since\|static\|struct\|todo\|summary\|undocumented\|virtual\)\>"
 
 syntax region jsDocType         contained matchgroup=jsDocTypeBrackets start="{" end="}" contains=jsDocTypeRecord oneline skipwhite nextgroup=jsDocParam
 syntax match  jsDocType         contained "\%(#\|\"\|\w\|\.\|:\|\/\)\+" skipwhite nextgroup=jsDocParam

ftdetect/javascript.vim

@@ -1,6 +1,13 @@
-au BufNewFile,BufRead *.js setf javascript
-au BufNewFile,BufRead *.jsm setf javascript
-au BufNewFile,BufRead Jakefile setf javascript
+au BufNewFile,BufRead *.{js,mjs,jsm,es,es6},Jakefile setf javascript
+
+fun! s:SourceFlowSyntax()
+  if !exists('javascript_plugin_flow') && !exists('b:flow_active') &&
+        \ search('\v\C%^\_s*%(//\s*|/\*[ \t\n*]*)\@flow>','nw')
+    runtime extras/flow.vim
+    let b:flow_active = 1
+  endif
+endfun
+au FileType javascript au BufRead,BufWritePost <buffer> call s:SourceFlowSyntax()
 
 fun! s:SelectJavascript()
   if getline(1) =~# '^#!.*/bin/\%(env\s\+\)\?node\>'

indent/javascript.vim

@@ -2,7 +2,7 @@
 " Language: Javascript
 " Maintainer: Chris Paul ( https://github.com/bounceme )
 " URL: https://github.com/pangloss/vim-javascript
-" Last Change: November 6, 2016
+" Last Change: August 12, 2017
 
 " Only load this indent file when no other was loaded.
 if exists('b:did_indent')
@@ -10,13 +10,27 @@ if exists('b:did_indent')
 endif
 let b:did_indent = 1
 
+" indent correctly if inside <script>
+" vim/vim@690afe1 for the switch from cindent
+let b:html_indent_script1 = 'inc'
+
 " Now, set up our indentation expression and keys that trigger it.
 setlocal indentexpr=GetJavascriptIndent()
 setlocal autoindent nolisp nosmartindent
-setlocal indentkeys=0{,0},0),0],:,!^F,o,O,e
-setlocal cinoptions+=j1,J1
+setlocal indentkeys+=0],0)
+" Testable with something like:
+" vim  -eNs "+filetype plugin indent on" "+syntax on" "+set ft=javascript" \
+"       "+norm! gg=G" '+%print' '+:q!' testfile.js \
+"       | diff -uBZ testfile.js -
+
+let b:undo_indent = 'setlocal indentexpr< smartindent< autoindent< indentkeys<'
 
-let b:undo_indent = 'setlocal indentexpr< smartindent< autoindent< indentkeys< cinoptions<'
+" Regex of syntax group names that are or delimit string or are comments.
+let b:syng_strcom = get(b:,'syng_strcom','string\|comment\|regex\|special\|doc\|template\%(braces\)\@!')
+let b:syng_str = get(b:,'syng_str','string\|template\|special')
+" template strings may want to be excluded when editing graphql:
+" au! Filetype javascript let b:syng_str = '^\%(.*template\)\@!.*string\|special'
+" au! Filetype javascript let b:syng_strcom = '^\%(.*template\)\@!.*string\|comment\|regex\|special\|doc'
 
 " Only define the function once.
 if exists('*GetJavascriptIndent')
@@ -33,165 +47,343 @@ if exists('*shiftwidth')
   endfunction
 else
   function s:sw()
-    return &sw
+    return &l:shiftwidth ? &l:shiftwidth : &l:tabstop
   endfunction
 endif
 
-let s:case_stmt = '\<\%(case\>\s*[^ \t:].*\|default\s*\):\C'
+" Performance for forwards search(): start search at pos rather than masking
+" matches before pos.
+let s:z = has('patch-7.4.984') ? 'z' : ''
 
-" Regex of syntax group names that are or delimit string or are comments.
-let s:syng_strcom = 'string\|comment\|regex\|special\|doc\|template'
+let s:syng_com = 'comment\|doc'
 " Expression used to check whether we should skip a match with searchpair().
-let s:skip_expr = "synIDattr(synID(line('.'),col('.'),0),'name') =~? '".s:syng_strcom."'"
-function s:skip_func(lnum)
-  if !s:free || search('`\|\*\/','nW',a:lnum)
-    let s:free = !eval(s:skip_expr . " . '\\|html'")
-    let s:looksyn = s:free ? line('.') : s:looksyn
-    return !s:free
-  endif
-  let s:looksyn = line('.')
-  return (search('\/','nbW',s:looksyn) || search('[''"\\]','nW',s:looksyn)) && eval(s:skip_expr . " . '\\|html'")
-endfunction
+let s:skip_expr = "s:SynAt(line('.'),col('.')) =~? b:syng_strcom"
 
+" searchpair() wrapper
 if has('reltime')
   function s:GetPair(start,end,flags,skip,time,...)
-    return searchpair(a:start,'',a:end,a:flags,a:skip,max([prevnonblank(v:lnum) - 2000,0] + a:000),a:time)
+    return searchpair('\m'.(a:start == '[' ? '\[' : a:start),'','\m'.a:end,
+          \ a:flags,a:skip,max([prevnonblank(v:lnum) - 2000,0] + a:000),a:time)
   endfunction
 else
   function s:GetPair(start,end,flags,skip,...)
-    return searchpair(a:start,'',a:end,a:flags,a:skip,max([prevnonblank(v:lnum) - 1000,get(a:000,1)]))
+    return searchpair('\m'.(a:start == '[' ? '\[' : a:start),'','\m'.a:end,
+          \ a:flags,a:skip,max([prevnonblank(v:lnum) - 1000,0,get(a:000,1)]))
   endfunction
 endif
 
-function s:current_char()
-  return getline('.')[col('.')-1]
+function s:SynAt(l,c)
+  let byte = line2byte(a:l) + a:c - 1
+  let pos = index(s:synid_cache[0], byte)
+  if pos == -1
+    let s:synid_cache[:] += [[byte], [synIDattr(synID(a:l, a:c, 0), 'name')]]
+  endif
+  return s:synid_cache[1][pos]
 endfunction
 
-function s:token()
-  return s:current_char() =~ '\k' ? expand('<cword>') : s:current_char()
+function s:ParseCino(f)
+  let [cin, divider, n] = [strridx(&cino,a:f), 0, '']
+  if cin == -1
+    return
+  endif
+  let [sign, cstr] = &cino[cin+1] == '-' ? [-1, &cino[cin+2:]] : [1, &cino[cin+1:]]
+  for c in split(cstr,'\zs')
+    if c == '.' && !divider
+      let divider = 1
+    elseif c ==# 's'
+      if n is ''
+        let n = s:sw()
+      else
+        let n = str2nr(n) * s:sw()
+      endif
+      break
+    elseif c =~ '\d'
+      let [n, divider] .= [c, 0]
+    else
+      break
+    endif
+  endfor
+  return sign * str2nr(n) / max([str2nr(divider),1])
 endfunction
 
-" NOTE: moves the cursor
-function s:previous_token()
-  return search('\<\|[][`^!"%-/:-?{-~]','bW') ? s:token() : ''
+" Optimized {skip} expr, only callable from the search loop which
+" GetJavascriptIndent does to find the containing [[{(] (relies on s:vars)
+function s:SkipFunc()
+  if s:top_col == 1
+    throw 'out of bounds'
+  endif
+  let s:top_col = 0
+  if s:check_in
+    if eval(s:skip_expr)
+      return 1
+    endif
+    let s:check_in = 0
+  elseif getline('.') =~ '\%<'.col('.').'c\/.\{-}\/\|\%>'.col('.').'c[''"]\|\\$'
+    if eval(s:skip_expr)
+      let s:looksyn = line('.')
+      return 1
+    endif
+  elseif search('\m`\|\${\|\*\/','nW'.s:z,s:looksyn) && eval(s:skip_expr)
+    let s:check_in = 1
+    return 1
+  endif
+  let [s:looksyn, s:top_col] = getpos('.')[1:2]
 endfunction
 
-function s:Trim(ln)
-  let pline = substitute(getline(a:ln),'\s*$','','')
-  let l:max = max([strridx(pline,'//'),strridx(pline,'/*'),0])
-  while l:max && synIDattr(synID(a:ln, strlen(pline), 0), 'name') =~? 'comment\|doc'
-    let pline = substitute(strpart(pline, 0, l:max),'\s*$','','')
-    let l:max = max([strridx(pline,'//'),strridx(pline,'/*'),0])
+function s:AlternatePair()
+  let [pat, l:for] = ['[][(){};]', 2]
+  while s:SearchLoop('\m'.pat,'bW',s:script_tag,'s:SkipFunc()')
+    if s:LookingAt() == ';'
+      if !l:for
+        if s:GetPair('{','}','bW','s:SkipFunc()',2000,s:script_tag)
+          return
+        endif
+        break
+      else
+        let [pat, l:for] = ['[{}();]', l:for - 1]
+      endif
+    else
+      let idx = stridx('])}',s:LookingAt())
+      if idx == -1
+        return
+      elseif !s:GetPair('[({'[idx],'])}'[idx],'bW','s:SkipFunc()',2000,s:script_tag)
+        break
+      endif
+    endif
   endwhile
-  return pline
+  throw 'out of bounds'
 endfunction
 
-" configurable regexes that define continuation lines, not including (, {, or [.
-let s:opfirst = '^' . get(g:,'javascript_opfirst',
-      \ '\%([<>,?^%|*/&]\|\([-.:+]\)\1\@!\|=>\@!\|in\%(stanceof\)\=\>\)')
-let s:continuation = get(g:,'javascript_continuation',
-      \ '\%([<=,.?/*^%|&:]\|+\@<!+\|-\@<!-\|=\@<!>\|\<in\%(stanceof\)\=\)') . '$'
-
-function s:OneScope(lnum,text)
-  if cursor(a:lnum, match(' ' . a:text, ')$')) + 1 &&
-        \ s:GetPair('(', ')', 'bW', s:skip_expr, 100) > 0
-    let token = s:previous_token()
-    if index(split('await each'),token) + 1
-      return s:previous_token() ==# 'for'
+function s:Nat(int)
+  return a:int * (a:int > 0)
+endfunction
+
+function s:LookingAt()
+  return getline('.')[col('.')-1]
+endfunction
+
+function s:Token()
+  return s:LookingAt() =~ '\k' ? expand('<cword>') : s:LookingAt()
+endfunction
+
+function s:PreviousToken()
+  let l:pos = getpos('.')
+  if search('\m\k\{1,}\|\S','ebW')
+    if (strpart(getline('.'),col('.')-2,2) == '*/' || line('.') != l:pos[1] &&
+          \ getline('.')[:col('.')-1] =~ '\/\/') && s:SynAt(line('.'),col('.')) =~? s:syng_com
+      if s:SearchLoop('\m\S\ze\_s*\/[/*]','bW',"s:SynAt(line('.'),col('.')) =~? s:syng_com")
+        return s:Token()
+      endif
+      call setpos('.',l:pos)
+    else
+      return s:Token()
     endif
-    return index(split('for if let while with'),token) + 1
   endif
-  return cursor(a:lnum, match(' ' . a:text, '\%(\<else\|\<do\|=>\)$\C')) + 1
+  return ''
+endfunction
+
+function s:Pure(f,...)
+  let l:pos = getpos('.')
+  let ret = call(a:f,a:000)
+  call setpos('.',l:pos)
+  return ret
+endfunction
+
+function s:SearchLoop(...)
+  let l:pos = getpos('.')
+  while call('search',a:000[:-2]) " search flags [^nc]
+    if !eval(a:000[-1])
+      return line('.')
+    endif
+  endwhile
+  call setpos('.',l:pos)
 endfunction
 
-function s:iscontOne(i,num,cont)
-  let [l:i, l:cont, l:num] = [a:i, a:cont, a:num + !a:num]
-  let pind = a:num ? indent(l:num) + s:W : 0
-  let ind = indent(l:i) + (a:cont ? 0 : s:W)
-  let bL = 0
-  while l:i >= l:num && (!l:cont || ind > pind)
-    if indent(l:i) < ind " first line always true for !a:cont, false for !!a:cont
-      if s:OneScope(l:i,s:Trim(l:i))
-        let bL += s:W
-        let [l:cont, l:i] = [0, line('.')]
-      elseif !l:cont
+function s:ExprCol()
+  if getline('.')[col('.')-2] == ':'
+    return 1
+  endif
+  let [bal, l:pos] = [0, getpos('.')]
+  while s:SearchLoop('\m[{}?:]','bW',s:script_tag,s:skip_expr)
+    if s:LookingAt() == ':'
+      let bal -= strpart(getline('.'),col('.')-2,3) !~ '::'
+    elseif s:LookingAt() == '?'
+      let bal += 1
+      if bal == 1
         break
       endif
-    elseif !a:cont
+    elseif s:LookingAt() == '{'
+      let bal = !s:IsBlock()
+      break
+    elseif !s:GetPair('{','}','bW',s:skip_expr,200)
       break
     endif
-    let ind = min([ind, indent(l:i)])
-    let l:i = s:PrevCodeLine(l:i - 1)
   endwhile
-  return bL
+  call setpos('.',l:pos)
+  return s:Nat(bal)
 endfunction
 
-" https://github.com/sweet-js/sweet.js/wiki/design#give-lookbehind-to-the-reader
-function s:IsBlock(...)
-  let l:ln = get(a:000,0,line('.'))
-  let char = s:previous_token()
-  let syn = char =~ '[{>/]' || l:ln != line('.') ? synIDattr(synID(line('.'),col('.')-(char == '{'),0),'name') : ''
-  if char is ''
-    return 1
-  elseif syn =~? 'xml\|jsx'
-    return char != '{'
-  elseif syn =~? 'comment'
-    return search('\/[/*]','bW') && s:IsBlock(l:ln)
-  elseif char == '>'
-    return getline('.')[col('.')-2] == '=' || syn =~? '^jsflow'
-  elseif char == ':'
-    return cursor(0,match(' ' . strpart(getline('.'),0,col('.')),'.*\zs' . s:case_stmt . '$')) + 1 &&
-          \ (expand('<cword>') !=# 'default' || s:previous_token() !~ '[,{]')
+" configurable regexes that define continuation lines, not including (, {, or [.
+let s:opfirst = '^' . get(g:,'javascript_opfirst',
+      \ '\C\%([<>=,.?^%|/&]\|\([-:+]\)\1\@!\|\*\+\|!=\|in\%(stanceof\)\=\>\)')
+let s:continuation = get(g:,'javascript_continuation',
+      \ '\C\%([<=,.~!?/*^%|&:]\|+\@<!+\|-\@<!-\|=\@<!>\|\<\%(typeof\|new\|delete\|void\|in\|instanceof\|await\)\)') . '$'
+
+function s:Continues(ln,con)
+  let tok = matchstr(a:con[-15:],s:continuation)
+  if tok =~ '[a-z:]'
+    call cursor(a:ln, len(a:con))
+    return tok == ':' ? s:ExprCol() : s:PreviousToken() != '.'
+  elseif tok !~ '[/>]'
+    return tok isnot ''
   endif
-  return index(split('return const let import export yield default delete var void typeof throw new in instanceof'
-        \ . ' - = ~ ! < * + , / ? ^ % | & ( ['), char) < (0 + (line('.') != l:ln))
+  return s:SynAt(a:ln, len(a:con)) !~? (tok == '>' ? 'jsflow\|^html' : 'regex')
 endfunction
 
-" Find line above 'lnum' that isn't empty, in a comment, or in a string.
+function s:Trim(ln)
+  let divi = split(getline(a:ln),'\s\+$\|\S\zs\ze\s*\/[/*]')
+  while len(divi) > 1 && s:SynAt(a:ln, len(join(divi,''))) =~? s:syng_com
+    call remove(divi,-1)
+  endwhile
+  return join(divi,'')
+endfunction
+
+" Find line above 'lnum' that isn't empty or in a comment
 function s:PrevCodeLine(lnum)
-  let l:lnum = prevnonblank(a:lnum)
-  while l:lnum
-    let syn = synIDattr(synID(l:lnum,matchend(getline(l:lnum), '^\s*[^''"`]'),0),'name')
-    if syn =~? 'html'
-      return
-    elseif syn !~? s:syng_strcom
-      return l:lnum
+  let [l:multi, l:n, l:pos] = [0, prevnonblank(a:lnum), getpos('.')]
+  while l:n
+    if getline(l:n) =~ '^\s*\/[/*]' && (getline(l:n) !~ '`' &&
+          \ getline(l:n-1)[-1:] != '\' || s:SynAt(l:n,1) !~? b:syng_str)
+      let l:n = prevnonblank(l:n-1)
+      continue
+    elseif l:multi || getline(l:n) =~ '\*\/'
+      call cursor(l:n,1)
+      if search('\m\/\*\|\(\*\/\)','bWp') == 1 && s:SynAt(l:n,1) =~? s:syng_com
+        let [l:multi, l:n] = [1, line('.')]
+        continue
+      endif
     endif
-    let l:lnum = prevnonblank(l:lnum - 1)
+    break
   endwhile
+  call setpos('.',l:pos)
+  return l:n
 endfunction
 
 " Check if line 'lnum' has a balanced amount of parentheses.
 function s:Balanced(lnum)
-  let l:open = 0
-  let l:line = getline(a:lnum)
-  let pos = match(l:line, '[][(){}]', 0)
+  let [l:open, l:line] = [0, getline(a:lnum)]
+  let pos = match(l:line, '[][(){}]')
   while pos != -1
-    if synIDattr(synID(a:lnum,pos + 1,0),'name') !~? s:syng_strcom
+    if s:SynAt(a:lnum,pos + 1) !~? b:syng_strcom
       let l:open += match(' ' . l:line[pos],'[[({]')
       if l:open < 0
         return
       endif
     endif
-    let pos = match(l:line, '[][(){}]', pos + 1)
+    let pos = match(l:line, l:open ?
+          \ matchstr(['[][]','[()]','[{}]'],l:line[pos]) :
+          \ '[][(){}]', pos + 1)
   endwhile
   return !l:open
 endfunction
 
+function s:OneScope(lnum)
+  call cursor(a:lnum, len(s:Trim(a:lnum)))
+  if s:LookingAt() == ')' && s:GetPair('(', ')', 'bW', s:skip_expr, 100)
+    let tok = s:PreviousToken()
+    return (tok =~# '^\%(for\|if\|let\|while\|with\)$' ||
+          \ tok =~# '^await$\|^each$' && s:PreviousToken() ==# 'for') &&
+          \ s:Pure('s:PreviousToken') != '.' && !(tok == 'while' && s:DoWhile())
+  elseif s:Token() =~# '^else$\|^do$'
+    return s:Pure('s:PreviousToken') != '.'
+  endif
+  return strpart(getline('.'),col('.')-2,2) == '=>'
+endfunction
+
+function s:DoWhile()
+  let cpos = searchpos('\m\<','cbW')
+  if s:SearchLoop('\m\C[{}]\|\<\%(do\|while\)\>','bW',s:skip_expr)
+    if s:{s:LookingAt() == '}' && s:GetPair('{','}','bW',s:skip_expr,200) ?
+          \ 'Previous' : ''}Token() ==# 'do' && s:IsBlock()
+      return 1
+    endif
+    call call('cursor',cpos)
+  endif
+endfunction
+
+" returns braceless levels started by 'i' and above lines * &sw. 'num' is the
+" lineNr which encloses the entire context, 'cont' if whether line 'i' + 1 is
+" a continued expression, which could have started in a braceless context
+function s:IsContOne(i,num,cont)
+  let [l:i, l:num, b_l] = [a:i, a:num + !a:num, 0]
+  let pind = a:num ? indent(a:num) + s:sw() : 0
+  let ind = indent(a:i) + (a:cont ? 0 : s:sw())
+  while l:i > l:num && ind > pind || l:i == l:num
+    if indent(l:i) < ind && s:OneScope(l:i)
+      let b_l += 1
+      let l:i = line('.')
+    elseif !a:cont || b_l || ind < indent(a:i)
+      break
+    endif
+    let ind = min([ind, indent(l:i)])
+    let l:i = s:PrevCodeLine(l:i - 1)
+  endwhile
+  return b_l
+endfunction
+
+function s:IsSwitch()
+  return s:PreviousToken() !~ '[.*]' &&
+        \ (!s:GetPair('{','}','cbW',s:skip_expr,100) || s:IsBlock() &&
+        \ (s:Token() !~ '^\K\k*$' || expand('<cword>') !=# 'class' &&
+        \ s:PreviousToken() !~# '^class$\|^extends$' || s:PreviousToken() == '.'))
+endfunction
+
+" https://github.com/sweet-js/sweet.js/wiki/design#give-lookbehind-to-the-reader
+function s:IsBlock()
+  let l:n = line('.')
+  let tok = s:PreviousToken()
+  if match(s:stack,'\cxml\|jsx') != -1 && s:SynAt(line('.'),col('.')-1) =~? 'xml\|jsx'
+    return tok != '{'
+  elseif tok =~ '\k'
+    if tok ==# 'type'
+      return s:Pure('eval',"s:PreviousToken() !~# '^\\%(im\\|ex\\)port$' || s:PreviousToken() == '.'")
+    endif
+    return index(split('return const let import export extends yield default delete var await void typeof throw case new of in instanceof')
+          \ ,tok) < (line('.') != l:n) || s:Pure('s:PreviousToken') == '.'
+  elseif tok == '>'
+    return getline('.')[col('.')-2] == '=' || s:SynAt(line('.'),col('.')) =~? 'jsflow\|^html'
+  elseif tok == '*'
+    return s:Pure('s:PreviousToken') == ':'
+  elseif tok == ':'
+    return !s:ExprCol()
+  elseif tok == '/'
+    return s:SynAt(line('.'),col('.')) =~? 'regex'
+  elseif tok !~ '[=~!<,.?^%|&([]'
+    return tok !~ '[-+]' || l:n != line('.') && getline('.')[col('.')-2] == tok
+  endif
+endfunction
+
 function GetJavascriptIndent()
-  let b:js_cache = get(b:,'js_cache',[0,0,0])
-  " Get the current line.
-  let l:line = getline(v:lnum)
-  let syns = synIDattr(synID(v:lnum, 1, 0), 'name')
+  let [b:js_cache, s:synid_cache, l:line, s:stack] = [
+        \ get(b:,'js_cache',[0,0,0]),
+        \ [[],[]],
+        \ getline(v:lnum),
+        \ map(synstack(v:lnum,1),"synIDattr(v:val,'name')"),
+        \ ]
+  " use synstack as it validates syn state and works in an empty line
+  let syns = get(s:stack,-1,'')
 
   " start with strings,comments,etc.
-  if syns =~? 'comment\|doc'
+  if syns =~? s:syng_com
     if l:line =~ '^\s*\*'
       return cindent(v:lnum)
-    elseif l:line !~ '^\s*\/'
+    elseif l:line !~ '^\s*\/[/*]'
       return -1
     endif
-  elseif syns =~? 'string\|template' && l:line !~ '^[''"]'
+  elseif syns =~? b:syng_str
+    if b:js_cache[0] == v:lnum - 1 && s:Balanced(v:lnum-1)
+      let b:js_cache[0] = v:lnum
+    endif
     return -1
   endif
   let l:lnum = s:PrevCodeLine(v:lnum - 1)
@@ -199,63 +391,97 @@ function GetJavascriptIndent()
     return
   endif
 
-  let l:line = substitute(substitute(l:line,'^\s*\%(\/\*.\{-}\*\/\s*\)*','',''),'^\/[/*].*','','')
-
-  " the containing paren, bracket, curly. Many hacks for performance
-  call cursor(v:lnum,1)
-  let idx = strlen(l:line) ? stridx('])}',l:line[0]) : -1
-  if indent(l:lnum)
-    let [s:looksyn,s:free] = [v:lnum - 1,1]
-    if b:js_cache[0] >= l:lnum && b:js_cache[0] < v:lnum &&
-          \ (b:js_cache[0] > l:lnum || s:Balanced(l:lnum))
-      call call('cursor',b:js_cache[1:])
-    elseif idx + 1
-      call s:GetPair(['\[','(','{'][idx], '])}'[idx],'bW','s:skip_func(s:looksyn)',2000)
-    elseif indent(v:lnum) && syns =~? 'block'
-      call s:GetPair('{','}','bW','s:skip_func(s:looksyn)',2000)
-    else
-      call s:GetPair('[({[]','[])}]','bW','s:skip_func(s:looksyn)',2000)
-    endif
-  else
-    call s:GetPair('[({[]','[])}]','bW',s:skip_expr,200,l:lnum)
+  let l:line = substitute(l:line,'^\s*','','')
+  let l:line_raw = l:line
+  if l:line[:1] == '/*'
+    let l:line = substitute(l:line,'^\%(\/\*.\{-}\*\/\s*\)*','','')
+  endif
+  if l:line =~ '^\/[/*]'
+    let l:line = ''
   endif
 
-  if idx + 1
-    if idx == 2 && search('\S','bW',line('.')) && s:current_char() == ')'
-      call s:GetPair('(',')','bW',s:skip_expr,200)
-    endif
-    return indent(line('.'))
+  " the containing paren, bracket, or curly. Many hacks for performance
+  let [ s:script_tag, idx ] = [ get(get(b:,'hi_indent',{}),'blocklnr'),
+        \ index([']',')','}'],l:line[0]) ]
+  if b:js_cache[0] > l:lnum && b:js_cache[0] < v:lnum ||
+        \ b:js_cache[0] == l:lnum && s:Balanced(l:lnum)
+    call call('cursor',b:js_cache[2] ? b:js_cache[1:] : [v:lnum,1])
+  else
+    call cursor(v:lnum,1)
+    let [s:looksyn, s:check_in, s:top_col] = [v:lnum - 1, 0, 0]
+    try
+      if idx != -1
+        call s:GetPair('[({'[idx],'])}'[idx],'bW','s:SkipFunc()',2000,s:script_tag)
+      elseif getline(v:lnum) !~ '^\S' && syns =~? 'block'
+        call s:GetPair('{','}','bW','s:SkipFunc()',2000,s:script_tag)
+      else
+        call s:AlternatePair()
+      endif
+    catch
+      call cursor(v:lnum,1)
+    endtry
   endif
 
-  let b:js_cache = [v:lnum] + (line('.') == v:lnum ? [0,0] : [line('.'),col('.')])
+  let b:js_cache = [v:lnum] + (line('.') == v:lnum ? [s:script_tag,0] : getpos('.')[1:2])
   let num = b:js_cache[1]
 
-  let [s:W, pline, isOp, stmt, bL, switch_offset] = [s:sw(), s:Trim(l:lnum),0,0,0,0]
-  if num && s:current_char() == '{' && s:IsBlock()
-    let stmt = 1
-    if s:current_char() == ')' && s:GetPair('(', ')', 'bW', s:skip_expr, 100) > 0 && s:previous_token() ==# 'switch'
-      let switch_offset = &cino !~ ':' || !has('float') ? s:W :
-            \ float2nr(str2float(matchstr(&cino,'.*:\zs[-0-9.]*')) * (&cino =~# '\%(.*:\)\@>[^,]*s' ? s:W : 1))
-      if l:line =~# '^' . s:case_stmt
-        return indent(num) + switch_offset
+  let [num_ind, is_op, b_l, l:switch_offset] = [s:Nat(indent(num)),0,0,0]
+  if !b:js_cache[2] || s:LookingAt() == '{' && s:IsBlock()
+    let [ilnum, pline] = [line('.'), s:Trim(l:lnum)]
+    if b:js_cache[2] && s:LookingAt() == ')' && s:GetPair('(',')','bW',s:skip_expr,100)
+      if ilnum == num
+        let [num, num_ind] = [line('.'), indent('.')]
+      endif
+      if idx == -1 && s:PreviousToken() ==# 'switch' && s:IsSwitch()
+        let l:switch_offset = &cino !~ ':' ? s:sw() : s:ParseCino(':')
+        if pline[-1:] != '.' && l:line =~# '^\%(default\|case\)\>'
+          return s:Nat(num_ind + l:switch_offset)
+        elseif &cino =~ '='
+          let l:case_offset = s:ParseCino('=')
+        endif
       endif
-      let stmt = pline !~# s:case_stmt . '$'
     endif
-  endif
-
-  if stmt || !num
-    let isOp = l:line =~# s:opfirst || pline =~# s:continuation
-    let bL = s:iscontOne(l:lnum,num,isOp)
-    let bL -= (bL && l:line[0] == '{') * s:W
+    if idx == -1 && pline[-1:] !~ '[{;]'
+      let sol = matchstr(l:line,s:opfirst)
+      if sol =~# '^\%(in\%(stanceof\)\=\|\*\)$'
+        call cursor(l:lnum, len(pline))
+        if pline[-1:] == '}' && s:GetPair('{','}','bW',s:skip_expr,200) && s:IsBlock()
+          return num_ind + s:sw()
+        endif
+        let is_op = s:sw()
+      elseif sol isnot '' || s:Continues(l:lnum,pline)
+        let is_op = s:sw()
+      endif
+      let b_l = s:Nat(s:IsContOne(l:lnum,b:js_cache[1],is_op) -
+            \ (!is_op && l:line =~ '^{')) * s:sw()
+    endif
+  elseif idx == -1 && getline(b:js_cache[1])[b:js_cache[2]-1] == '(' && &cino =~ '(' &&
+        \ (search('\m\S','nbW',num) || s:ParseCino('U'))
+    let pval = s:ParseCino('(')
+    if !pval
+      let [Wval, vcol] = [s:ParseCino('W'), virtcol('.')]
+      if search('\m\S','W',num)
+        return s:ParseCino('w') ? vcol : virtcol('.')-1
+      endif
+      return Wval ? s:Nat(num_ind + Wval) : vcol
+    endif
+    return s:Nat(num_ind + pval + s:GetPair('(',')','nbrmW',s:skip_expr,100,num) * s:sw())
   endif
 
   " main return
-  if isOp
-    return (num ? indent(num) : -s:W) + (s:W * 2) + switch_offset + bL
+  if l:line =~ '^[])}]\|^|}'
+    if l:line_raw[0] == ')' && getline(b:js_cache[1])[b:js_cache[2]-1] == '('
+      if s:ParseCino('M')
+        return indent(l:lnum)
+      elseif &cino =~# 'm' && !s:ParseCino('m')
+        return virtcol('.') - 1
+      endif
+    endif
+    return num_ind
   elseif num
-    return indent(num) + s:W + switch_offset + bL
+    return s:Nat(num_ind + get(l:,'case_offset',s:sw()) + l:switch_offset + b_l + is_op)
   endif
-  return bL
+  return b_l + is_op
 endfunction
 
 let &cpo = s:cpo_save

syntax/javascript.vim

@@ -24,53 +24,55 @@ syntax sync fromstart
 " syntax case ignore
 syntax case match
 
-syntax match   jsNoise          /[:,\;\.]\{1}/
+syntax match   jsNoise          /[:,\;]\{1}/
+syntax match   jsNoise          /[\.]\{1}/ skipwhite skipempty nextgroup=jsObjectProp,jsFuncCall,jsPrototype,jsTaggedTemplate
+syntax match   jsObjectProp     contained /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>/
 syntax match   jsFuncCall       /\k\+\%(\s*(\)\@=/
 syntax match   jsParensError    /[)}\]]/
 
 " Program Keywords
 syntax keyword jsStorageClass   const var let skipwhite skipempty nextgroup=jsDestructuringBlock,jsDestructuringArray,jsVariableDef
-syntax match   jsVariableDef    contained /\k\+/ nextgroup=jsFlowDefinition
-syntax keyword jsOperator       delete instanceof typeof void new in of
-syntax match   jsOperator       /[\!\|\&\+\-\<\>\=\%\/\*\~\^]\{1}/
+syntax match   jsVariableDef    contained /\k\+/ skipwhite skipempty nextgroup=jsFlowDefinition
+syntax keyword jsOperator       delete instanceof typeof void new in of skipwhite skipempty nextgroup=@jsExpression
+syntax match   jsOperator       /[\!\|\&\+\-\<\>\=\%\/\*\~\^]\{1}/ skipwhite skipempty nextgroup=@jsExpression
+syntax match   jsOperator       /::/ skipwhite skipempty nextgroup=@jsExpression
 syntax keyword jsBooleanTrue    true
 syntax keyword jsBooleanFalse   false
 
 " Modules
-syntax keyword jsModuleKeywords  contained import
-syntax keyword jsModuleKeywords  contained export skipwhite skipempty nextgroup=jsExportBlock,jsModuleDefault
-syntax keyword jsModuleOperators contained from
-syntax keyword jsModuleOperators contained as
-syntax region  jsModuleGroup     contained matchgroup=jsModuleBraces start=/{/ end=/}/ contains=jsModuleOperators,jsNoise,jsComment
-syntax match   jsModuleAsterisk  contained /*/
-syntax keyword jsModuleDefault   contained default skipwhite skipempty nextgroup=@jsExpression
-syntax region  jsImportContainer start=/\<import\> / end="\%(;\|$\)" contains=jsModuleKeywords,jsModuleOperators,jsComment,jsString,jsTemplateString,jsNoise,jsModuleGroup,jsModuleAsterisk
-syntax region  jsExportContainer start=/\<export\> / end="\%(;\|$\)" contains=jsModuleKeywords,jsModuleOperators,jsStorageClass,jsModuleDefault,@jsExpression
-syntax region  jsExportBlock     contained matchgroup=jsExportBraces start=/{/ end=/}/ contains=jsModuleOperators,jsNoise,jsComment
+syntax keyword jsImport                       import skipwhite skipempty nextgroup=jsModuleAsterisk,jsModuleKeyword,jsModuleGroup,jsFlowImportType
+syntax keyword jsExport                       export skipwhite skipempty nextgroup=@jsAll,jsModuleGroup,jsExportDefault,jsModuleAsterisk,jsModuleKeyword,jsFlowTypeStatement
+syntax match   jsModuleKeyword      contained /\k\+/ skipwhite skipempty nextgroup=jsModuleAs,jsFrom,jsModuleComma
+syntax keyword jsExportDefault      contained default skipwhite skipempty nextgroup=@jsExpression
+syntax keyword jsExportDefaultGroup contained default skipwhite skipempty nextgroup=jsModuleAs,jsFrom,jsModuleComma
+syntax match   jsModuleAsterisk     contained /\*/ skipwhite skipempty nextgroup=jsModuleKeyword,jsModuleAs,jsFrom
+syntax keyword jsModuleAs           contained as skipwhite skipempty nextgroup=jsModuleKeyword,jsExportDefaultGroup
+syntax keyword jsFrom               contained from skipwhite skipempty nextgroup=jsString
+syntax match   jsModuleComma        contained /,/ skipwhite skipempty nextgroup=jsModuleKeyword,jsModuleAsterisk,jsModuleGroup,jsFlowTypeKeyword
 
 " Strings, Templates, Numbers
 syntax region  jsString           start=+"+  skip=+\\\("\|$\)+  end=+"\|$+  contains=jsSpecial,@Spell extend
 syntax region  jsString           start=+'+  skip=+\\\('\|$\)+  end=+'\|$+  contains=jsSpecial,@Spell extend
-syntax region  jsTemplateString   start=+`+  skip=+\\\(`\|$\)+  end=+`+     contains=jsTemplateVar,jsSpecial extend
+syntax region  jsTemplateString   start=+`+  skip=+\\\(`\|$\)+  end=+`+     contains=jsTemplateExpression,jsSpecial,@Spell extend
 syntax match   jsTaggedTemplate   /\k\+\%(`\)\@=/ nextgroup=jsTemplateString
 syntax match   jsNumber           /\<\d\+\%([eE][+-]\=\d\+\)\=\>\|\<0[bB][01]\+\>\|\<0[oO]\o\+\>\|\<0[xX]\x\+\>/
 syntax keyword jsNumber           Infinity
 syntax match   jsFloat            /\<\%(\d\+\.\d\+\|\d\+\.\|\.\d\+\)\%([eE][+-]\=\d\+\)\=\>/
 
 " Regular Expressions
-syntax match   jsSpecial          contained "\v\\%(0|\\x\x\{2\}\|\\u\x\{4\}\|\c[A-Z]|.)"
-syntax region  jsTemplateVar      contained matchgroup=jsTemplateBraces start=+${+ end=+}+ contains=@jsExpression
-syntax region  jsRegexpCharClass  contained start=+\[+ skip=+\\.+ end=+\]+
-syntax match   jsRegexpBoundary   contained "\v%(\<@![\^$]|\\[bB])"
-syntax match   jsRegexpBackRef    contained "\v\\[1-9][0-9]*"
-syntax match   jsRegexpQuantifier contained "\v\\@<!%([?*+]|\{\d+%(,|,\d+)?})\??"
-syntax match   jsRegexpOr         contained "\v\<@!\|"
-syntax match   jsRegexpMod        contained "\v\(@<=\?[:=!>]"
-syntax region  jsRegexpGroup      contained start="\\\@<!(" skip="\\.\|\[\(\\.\|[^]]\)*\]" end="\\\@<!)" contains=jsRegexpCharClass,@jsRegexpSpecial keepend
+syntax match   jsSpecial            contained "\v\\%(0|\\x\x\{2\}\|\\u\x\{4\}\|\c[A-Z]|.)"
+syntax region  jsTemplateExpression contained matchgroup=jsTemplateBraces start=+${+ end=+}+ contains=@jsExpression keepend
+syntax region  jsRegexpCharClass    contained start=+\[+ skip=+\\.+ end=+\]+
+syntax match   jsRegexpBoundary     contained "\v%(\<@![\^$]|\\[bB])"
+syntax match   jsRegexpBackRef      contained "\v\\[1-9][0-9]*"
+syntax match   jsRegexpQuantifier   contained "\v\\@<!%([?*+]|\{\d+%(,|,\d+)?})\??"
+syntax match   jsRegexpOr           contained "\v\<@!\|"
+syntax match   jsRegexpMod          contained "\v\(@<=\?[:=!>]"
+syntax region  jsRegexpGroup        contained start="\\\@<!(" skip="\\.\|\[\(\\.\|[^]]\)*\]" end="\\\@<!)" contains=jsRegexpCharClass,@jsRegexpSpecial keepend
 if v:version > 703 || v:version == 603 && has("patch1088")
-  syntax region  jsRegexpString   start=+\%(\%(\%(return\|case\)\s\+\)\@50<=\|\%(\%([)\]"']\|\d\|\w\)\s*\)\@50<!\)/\(\*\|/\)\@!+ skip=+\\.\|\[\%(\\.\|[^]]\)*\]+ end=+/[gimy]\{,4}+ contains=jsRegexpCharClass,jsRegexpGroup,@jsRegexpSpecial oneline keepend extend
+  syntax region  jsRegexpString   start=+\%(\%(\%(return\|case\)\s\+\)\@50<=\|\%(\%([)\]"']\|\d\|\w\)\s*\)\@50<!\)/\(\*\|/\)\@!+ skip=+\\.\|\[\%(\\.\|[^]]\)*\]+ end=+/[gimyu]\{,5}+ contains=jsRegexpCharClass,jsRegexpGroup,@jsRegexpSpecial oneline keepend extend
 else
-  syntax region  jsRegexpString   start=+\%(\%(\%(return\|case\)\s\+\)\@<=\|\%(\%([)\]"']\|\d\|\w\)\s*\)\@<!\)/\(\*\|/\)\@!+ skip=+\\.\|\[\%(\\.\|[^]]\)*\]+ end=+/[gimy]\{,4}+ contains=jsRegexpCharClass,jsRegexpGroup,@jsRegexpSpecial oneline keepend extend
+  syntax region  jsRegexpString   start=+\%(\%(\%(return\|case\)\s\+\)\@<=\|\%(\%([)\]"']\|\d\|\w\)\s*\)\@<!\)/\(\*\|/\)\@!+ skip=+\\.\|\[\%(\\.\|[^]]\)*\]+ end=+/[gimyu]\{,5}+ contains=jsRegexpCharClass,jsRegexpGroup,@jsRegexpSpecial oneline keepend extend
 endif
 syntax cluster jsRegexpSpecial    contains=jsSpecial,jsRegexpBoundary,jsRegexpBackRef,jsRegexpQuantifier,jsRegexpOr,jsRegexpMod
 
@@ -81,15 +83,15 @@ syntax region  jsObjectKeyString   contained start=+"+  skip=+\\\("\|$\)+  end=+
 syntax region  jsObjectKeyString   contained start=+'+  skip=+\\\('\|$\)+  end=+'\|$+  contains=jsSpecial,@Spell skipwhite skipempty nextgroup=jsObjectValue
 syntax region  jsObjectKeyComputed contained matchgroup=jsBrackets start=/\[/ end=/]/ contains=@jsExpression skipwhite skipempty nextgroup=jsObjectValue,jsFuncArgs extend
 syntax match   jsObjectSeparator   contained /,/
-syntax region  jsObjectValue       contained start=/:/ end=/\%(,\|}\)\@=/ contains=jsObjectColon,@jsExpression extend
+syntax region  jsObjectValue       contained matchgroup=jsNoise start=/:/ end=/\%(,\|}\)\@=/ contains=@jsExpression extend
 syntax match   jsObjectFuncName    contained /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>[\r\n\t ]*(\@=/ skipwhite skipempty nextgroup=jsFuncArgs
 syntax match   jsFunctionKey       contained /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>\(\s*:\s*function\s*\)\@=/
-syntax match   jsObjectMethodType  contained /\%(get\|set\|static\|async\)\%( \k\+\)\@=/ skipwhite skipempty nextgroup=jsObjectFuncName
+syntax match   jsObjectMethodType  contained /\%(get\|set\)\%( \k\+\)\@=/ skipwhite skipempty nextgroup=jsObjectFuncName
 syntax region  jsObjectStringKey   contained start=+"+  skip=+\\\("\|$\)+  end=+"\|$+  contains=jsSpecial,@Spell extend skipwhite skipempty nextgroup=jsFuncArgs,jsObjectValue
 syntax region  jsObjectStringKey   contained start=+'+  skip=+\\\('\|$\)+  end=+'\|$+  contains=jsSpecial,@Spell extend skipwhite skipempty nextgroup=jsFuncArgs,jsObjectValue
 
 exe 'syntax keyword jsNull      null             '.(exists('g:javascript_conceal_null')      ? 'conceal cchar='.g:javascript_conceal_null       : '')
-exe 'syntax keyword jsReturn    return contained '.(exists('g:javascript_conceal_return')    ? 'conceal cchar='.g:javascript_conceal_return     : '')
+exe 'syntax keyword jsReturn    return contained '.(exists('g:javascript_conceal_return')    ? 'conceal cchar='.g:javascript_conceal_return     : '').' skipwhite skipempty nextgroup=@jsExpression'
 exe 'syntax keyword jsUndefined undefined        '.(exists('g:javascript_conceal_undefined') ? 'conceal cchar='.g:javascript_conceal_undefined  : '')
 exe 'syntax keyword jsNan       NaN              '.(exists('g:javascript_conceal_NaN')       ? 'conceal cchar='.g:javascript_conceal_NaN        : '')
 exe 'syntax keyword jsPrototype prototype        '.(exists('g:javascript_conceal_prototype') ? 'conceal cchar='.g:javascript_conceal_prototype  : '')
@@ -97,24 +99,27 @@ exe 'syntax keyword jsThis      this             '.(exists('g:javascript_conceal
 exe 'syntax keyword jsSuper     super  contained '.(exists('g:javascript_conceal_super')     ? 'conceal cchar='.g:javascript_conceal_super      : '')
 
 " Statement Keywords
-syntax keyword jsStatement    contained break continue with yield debugger
-syntax keyword jsConditional            if           skipwhite skipempty nextgroup=jsParenIfElse
-syntax keyword jsConditional            else         skipwhite skipempty nextgroup=jsCommentMisc,jsIfElseBlock
-syntax keyword jsConditional            switch       skipwhite skipempty nextgroup=jsParenSwitch
-syntax keyword jsRepeat                 while for    skipwhite skipempty nextgroup=jsParenRepeat,jsForAwait
-syntax keyword jsDo                     do           skipwhite skipempty nextgroup=jsRepeatBlock
-syntax keyword jsLabel        contained case default
-syntax keyword jsTry                    try          skipwhite skipempty nextgroup=jsTryCatchBlock
-syntax keyword jsFinally      contained finally      skipwhite skipempty nextgroup=jsFinallyBlock
-syntax keyword jsCatch        contained catch        skipwhite skipempty nextgroup=jsParenCatch
+syntax match   jsBlockLabel              /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>\s*::\@!/    contains=jsNoise skipwhite skipempty nextgroup=jsBlock
+syntax match   jsBlockLabelKey contained /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>\%(\s*\%(;\|\n\)\)\@=/
+syntax keyword jsStatement    contained with yield debugger
+syntax keyword jsStatement    contained break continue skipwhite skipempty nextgroup=jsBlockLabelKey
+syntax keyword jsConditional            if             skipwhite skipempty nextgroup=jsParenIfElse
+syntax keyword jsConditional            else           skipwhite skipempty nextgroup=jsCommentIfElse,jsIfElseBlock
+syntax keyword jsConditional            switch         skipwhite skipempty nextgroup=jsParenSwitch
+syntax keyword jsRepeat                 while for      skipwhite skipempty nextgroup=jsParenRepeat,jsForAwait
+syntax keyword jsDo                     do             skipwhite skipempty nextgroup=jsRepeatBlock
+syntax region  jsSwitchCase   contained matchgroup=jsLabel start=/\<\%(case\|default\)\>/ end=/:\@=/ contains=@jsExpression,jsLabel skipwhite skipempty nextgroup=jsSwitchColon keepend
+syntax keyword jsTry                    try            skipwhite skipempty nextgroup=jsTryCatchBlock
+syntax keyword jsFinally      contained finally        skipwhite skipempty nextgroup=jsFinallyBlock
+syntax keyword jsCatch        contained catch          skipwhite skipempty nextgroup=jsParenCatch
 syntax keyword jsException              throw
 syntax keyword jsAsyncKeyword           async await
-syntax match   jsSwitchColon  contained /:/          skipwhite skipempty nextgroup=jsSwitchBlock
+syntax match   jsSwitchColon   contained /::\@!/       skipwhite skipempty nextgroup=jsSwitchBlock
 
 " Keywords
 syntax keyword jsGlobalObjects      Array Boolean Date Function Iterator Number Object Symbol Map WeakMap Set RegExp String Proxy Promise Buffer ParallelArray ArrayBuffer DataView Float32Array Float64Array Int16Array Int32Array Int8Array Uint16Array Uint32Array Uint8Array Uint8ClampedArray JSON Math console document window Intl Collator DateTimeFormat NumberFormat fetch
-syntax keyword jsGlobalNodeObjects  module exports global process
-syntax match   jsGlobalNodeObjects  /require/ containedin=jsFuncCall
+syntax keyword jsGlobalNodeObjects  module exports global process __dirname __filename
+syntax match   jsGlobalNodeObjects  /\<require\>/ containedin=jsFuncCall
 syntax keyword jsExceptions         Error EvalError InternalError RangeError ReferenceError StopIteration SyntaxError TypeError URIError
 syntax keyword jsBuiltins           decodeURI decodeURIComponent encodeURI encodeURIComponent eval isFinite isNaN parseFloat parseInt uneval
 " DISCUSS: How imporant is this, really? Perhaps it should be linked to an error because I assume the keywords are reserved?
@@ -135,29 +140,29 @@ syntax keyword jsDomNodeConsts  ELEMENT_NODE ATTRIBUTE_NODE TEXT_NODE CDATA_SECT
 syntax keyword jsHtmlEvents     onblur onclick oncontextmenu ondblclick onfocus onkeydown onkeypress onkeyup onmousedown onmousemove onmouseout onmouseover onmouseup onresize
 
 " Code blocks
-syntax region  jsBracket                      matchgroup=jsBrackets            start=/\[/ end=/\]/ contains=@jsExpression extend fold
-syntax region  jsParen                        matchgroup=jsParens              start=/(/  end=/)/  contains=@jsAll extend fold
-syntax region  jsParenDecorator     contained matchgroup=jsParensDecorator     start=/(/  end=/)/  contains=@jsAll skipwhite skipempty nextgroup=jsCommentMisc extend fold
-syntax region  jsParenIfElse        contained matchgroup=jsParensIfElse        start=/(/  end=/)/  contains=@jsAll skipwhite skipempty nextgroup=jsCommentMisc,jsIfElseBlock extend fold
-syntax region  jsParenRepeat        contained matchgroup=jsParensRepeat        start=/(/  end=/)/  contains=@jsAll skipwhite skipempty nextgroup=jsCommentMisc,jsRepeatBlock extend fold
+syntax region  jsBracket                      matchgroup=jsBrackets            start=/\[/ end=/\]/ contains=@jsExpression,jsSpreadExpression extend fold
+syntax region  jsParen                        matchgroup=jsParens              start=/(/  end=/)/  contains=@jsExpression extend fold nextgroup=jsFlowDefinition
+syntax region  jsParenDecorator     contained matchgroup=jsParensDecorator     start=/(/  end=/)/  contains=@jsAll extend fold
+syntax region  jsParenIfElse        contained matchgroup=jsParensIfElse        start=/(/  end=/)/  contains=@jsAll skipwhite skipempty nextgroup=jsCommentIfElse,jsIfElseBlock extend fold
+syntax region  jsParenRepeat        contained matchgroup=jsParensRepeat        start=/(/  end=/)/  contains=@jsAll skipwhite skipempty nextgroup=jsCommentRepeat,jsRepeatBlock extend fold
 syntax region  jsParenSwitch        contained matchgroup=jsParensSwitch        start=/(/  end=/)/  contains=@jsAll skipwhite skipempty nextgroup=jsSwitchBlock extend fold
 syntax region  jsParenCatch         contained matchgroup=jsParensCatch         start=/(/  end=/)/  skipwhite skipempty nextgroup=jsTryCatchBlock extend fold
-syntax region  jsFuncArgs           contained matchgroup=jsFuncParens          start=/(/  end=/)/  contains=jsFuncArgCommas,jsComment,jsFuncArgExpression,jsDestructuringBlock,jsRestExpression,jsFlowArgumentDef skipwhite skipempty nextgroup=jsCommentFunction,jsFuncBlock,jsFlowReturn extend fold
-syntax region  jsClassBlock         contained matchgroup=jsClassBraces         start=/{/  end=/}/  contains=jsClassFuncName,jsClassMethodType,jsArrowFunction,jsArrowFuncArgs,jsComment,jsGenerator,jsDecorator,jsClassProperty,jsClassPropertyComputed,jsClassStringKey,jsNoise extend fold
-syntax region  jsFuncBlock          contained matchgroup=jsFuncBraces          start=/{/  end=/}/  contains=@jsAll extend fold
-syntax region  jsIfElseBlock        contained matchgroup=jsIfElseBraces        start=/{/  end=/}/  contains=@jsAll extend fold
-syntax region  jsBlock              contained matchgroup=jsBraces              start=/{/  end=/}/  contains=@jsAll extend fold
-syntax region  jsTryCatchBlock      contained matchgroup=jsTryCatchBraces      start=/{/  end=/}/  contains=@jsAll skipwhite skipempty nextgroup=jsCatch,jsFinally extend fold
-syntax region  jsFinallyBlock       contained matchgroup=jsFinallyBraces       start=/{/  end=/}/  contains=@jsAll extend fold
-syntax region  jsSwitchBlock        contained matchgroup=jsSwitchBraces        start=/{/  end=/}/  contains=@jsAll,jsLabel,jsSwitchColon extend fold
-syntax region  jsRepeatBlock        contained matchgroup=jsRepeatBraces        start=/{/  end=/}/  contains=@jsAll extend fold
-syntax region  jsDestructuringBlock contained matchgroup=jsDestructuringBraces start=/{/  end=/}/  contains=jsDestructuringProperty,jsDestructuringAssignment,jsDestructuringNoise,jsDestructuringPropertyComputed,jsSpreadExpression extend fold
-syntax region  jsDestructuringArray contained matchgroup=jsDestructuringBraces start=/\[/ end=/\]/ contains=jsDestructuringPropertyValue,jsNoise,jsDestructuringProperty,jsSpreadExpression extend fold
-syntax region  jsObject                       matchgroup=jsObjectBraces        start=/{/  end=/}/  contains=jsObjectKey,jsObjectKeyString,jsObjectKeyComputed,jsObjectSeparator,jsObjectFuncName,jsObjectMethodType,jsGenerator,jsComment,jsObjectStringKey,jsSpreadExpression,jsDecorator extend fold
-syntax region  jsTernaryIf                    matchgroup=jsTernaryIfOperator   start=/?/  end=/\%(:\|[\}]\@=\)/  contains=@jsExpression
+syntax region  jsFuncArgs           contained matchgroup=jsFuncParens          start=/(/  end=/)/  contains=jsFuncArgCommas,jsComment,jsFuncArgExpression,jsDestructuringBlock,jsDestructuringArray,jsRestExpression,jsFlowArgumentDef skipwhite skipempty nextgroup=jsCommentFunction,jsFuncBlock,jsFlowReturn extend fold
+syntax region  jsClassBlock         contained matchgroup=jsClassBraces         start=/{/  end=/}/  contains=jsClassFuncName,jsClassMethodType,jsArrowFunction,jsArrowFuncArgs,jsComment,jsGenerator,jsDecorator,jsClassProperty,jsClassPropertyComputed,jsClassStringKey,jsAsyncKeyword,jsNoise extend fold
+syntax region  jsFuncBlock          contained matchgroup=jsFuncBraces          start=/{/  end=/}/  contains=@jsAll,jsBlock extend fold
+syntax region  jsIfElseBlock        contained matchgroup=jsIfElseBraces        start=/{/  end=/}/  contains=@jsAll,jsBlock extend fold
+syntax region  jsTryCatchBlock      contained matchgroup=jsTryCatchBraces      start=/{/  end=/}/  contains=@jsAll,jsBlock skipwhite skipempty nextgroup=jsCatch,jsFinally extend fold
+syntax region  jsFinallyBlock       contained matchgroup=jsFinallyBraces       start=/{/  end=/}/  contains=@jsAll,jsBlock extend fold
+syntax region  jsSwitchBlock        contained matchgroup=jsSwitchBraces        start=/{/  end=/}/  contains=@jsAll,jsBlock,jsSwitchCase extend fold
+syntax region  jsRepeatBlock        contained matchgroup=jsRepeatBraces        start=/{/  end=/}/  contains=@jsAll,jsBlock extend fold
+syntax region  jsDestructuringBlock contained matchgroup=jsDestructuringBraces start=/{/  end=/}/  contains=jsDestructuringProperty,jsDestructuringAssignment,jsDestructuringNoise,jsDestructuringPropertyComputed,jsSpreadExpression,jsComment extend fold
+syntax region  jsDestructuringArray contained matchgroup=jsDestructuringBraces start=/\[/ end=/\]/ contains=jsDestructuringPropertyValue,jsNoise,jsDestructuringProperty,jsSpreadExpression,jsComment extend fold
+syntax region  jsObject             contained matchgroup=jsObjectBraces        start=/{/  end=/}/  contains=jsObjectKey,jsObjectKeyString,jsObjectKeyComputed,jsObjectSeparator,jsObjectFuncName,jsObjectMethodType,jsGenerator,jsComment,jsObjectStringKey,jsSpreadExpression,jsDecorator,jsAsyncKeyword extend fold
+syntax region  jsBlock                        matchgroup=jsBraces              start=/{/  end=/}/  contains=@jsAll,jsSpreadExpression extend fold
+syntax region  jsModuleGroup        contained matchgroup=jsModuleBraces        start=/{/ end=/}/   contains=jsModuleKeyword,jsModuleComma,jsModuleAs,jsComment,jsFlowTypeKeyword skipwhite skipempty nextgroup=jsFrom fold
 syntax region  jsSpreadExpression   contained matchgroup=jsSpreadOperator      start=/\.\.\./ end=/[,}\]]\@=/ contains=@jsExpression
 syntax region  jsRestExpression     contained matchgroup=jsRestOperator        start=/\.\.\./ end=/[,)]\@=/
-syntax region  jsTernaryIf                    matchgroup=jsTernaryIfOperator   start=/?/  end=/\%(:\|[\}]\@=\)/  contains=@jsExpression
+syntax region  jsTernaryIf                    matchgroup=jsTernaryIfOperator   start=/?/  end=/\%(:\|[\}]\@=\)/  contains=@jsExpression extend skipwhite skipempty nextgroup=@jsExpression
 
 syntax match   jsGenerator            contained /\*/ skipwhite skipempty nextgroup=jsFuncName,jsFuncArgs
 syntax match   jsFuncName             contained /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>/ skipwhite skipempty nextgroup=jsFuncArgs,jsFlowFunctionGroup
@@ -173,13 +178,16 @@ syntax match   jsArrowFuncArgs  /([^()]*)\s*\(=>\)\@=/ contains=jsFuncArgs skipe
 
 exe 'syntax match jsFunction /\<function\>/ skipwhite skipempty nextgroup=jsGenerator,jsFuncName,jsFuncArgs skipwhite '.(exists('g:javascript_conceal_function')       ? 'conceal cchar='.g:javascript_conceal_function : '')
 exe 'syntax match jsArrowFunction /=>/      skipwhite skipempty nextgroup=jsFuncBlock,jsCommentFunction               '.(exists('g:javascript_conceal_arrow_function') ? 'conceal cchar='.g:javascript_conceal_arrow_function : '')
+exe 'syntax match jsArrowFunction /()\s*\(=>\)\@=/   skipwhite skipempty nextgroup=jsArrowFunction                    '.(exists('g:javascript_conceal_noarg_arrow_function') ? 'conceal cchar='.g:javascript_conceal_noarg_arrow_function : '').(' contains=jsArrowFuncArgs')
+exe 'syntax match jsArrowFunction /_\s*\(=>\)\@=/    skipwhite skipempty nextgroup=jsArrowFunction                    '.(exists('g:javascript_conceal_underscore_arrow_function') ? 'conceal cchar='.g:javascript_conceal_underscore_arrow_function : '')
 
 " Classes
-syntax keyword jsClassKeywords          contained extends class
+syntax keyword jsClassKeyword           contained class
+syntax keyword jsExtendsKeyword         contained extends skipwhite skipempty nextgroup=@jsExpression
 syntax match   jsClassNoise             contained /\./
-syntax match   jsClassMethodType        contained /\%(get\|set\|static\|async\)\%( \k\+\)\@=/ skipwhite skipempty nextgroup=jsFuncName,jsClassProperty
-syntax match   jsClassDefinition        /\<class\>\%( [a-zA-Z_$][0-9a-zA-Z_$ \n.]*\)*/ contains=jsClassKeywords,jsClassNoise skipwhite skipempty nextgroup=jsCommentClass,jsClassBlock,jsFlowClassGroup
-syntax match   jsClassProperty          contained /\<[0-9a-zA-Z_$]*\>\(\s*=\)\@=/ skipwhite skipempty nextgroup=jsClassValue
+syntax match   jsClassMethodType        contained /\%(get\|set\|static\)\%( \k\+\)\@=/ skipwhite skipempty nextgroup=jsAsyncKeyword,jsFuncName,jsClassProperty
+syntax region  jsClassDefinition                  start=/\<class\>/ end=/\(\<extends\>\s\+\)\@<!{\@=/ contains=jsClassKeyword,jsExtendsKeyword,jsClassNoise,@jsExpression,jsFlowClassGroup skipwhite skipempty nextgroup=jsCommentClass,jsClassBlock,jsFlowClassGroup
+syntax match   jsClassProperty          contained /\<[0-9a-zA-Z_$]*\>\(\s*[=:]\)\@=/ skipwhite skipempty nextgroup=jsClassValue,jsFlowClassDef
 syntax region  jsClassValue             contained start=/=/ end=/\%(;\|}\|\n\)\@=/ contains=@jsExpression
 syntax region  jsClassPropertyComputed  contained matchgroup=jsBrackets start=/\[/ end=/]/ contains=@jsExpression skipwhite skipempty nextgroup=jsFuncArgs,jsClassValue extend
 syntax match   jsClassFuncName          contained /\<[a-zA-Z_$][0-9a-zA-Z_$]*\>\%(\s*(\)\@=/ skipwhite skipempty nextgroup=jsFuncArgs
@@ -208,8 +216,10 @@ syntax region  jsCommentFunction    contained start=/\/\// end=/$/    contains=j
 syntax region  jsCommentFunction    contained start=/\/\*/ end=/\*\// contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturn fold extend keepend
 syntax region  jsCommentClass       contained start=/\/\// end=/$/    contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsClassBlock,jsFlowClassGroup extend keepend
 syntax region  jsCommentClass       contained start=/\/\*/ end=/\*\// contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsClassBlock,jsFlowClassGroup fold extend keepend
-syntax region  jsCommentMisc        contained start=/\/\// end=/$/    contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsBlock extend keepend
-syntax region  jsCommentMisc        contained start=/\/\*/ end=/\*\// contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsBlock fold extend keepend
+syntax region  jsCommentIfElse      contained start=/\/\// end=/$/    contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsIfElseBlock extend keepend
+syntax region  jsCommentIfElse      contained start=/\/\*/ end=/\*\// contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsIfElseBlock fold extend keepend
+syntax region  jsCommentRepeat      contained start=/\/\// end=/$/    contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsRepeatBlock extend keepend
+syntax region  jsCommentRepeat      contained start=/\/\*/ end=/\*\// contains=jsCommentTodo,@Spell skipwhite skipempty nextgroup=jsRepeatBlock fold extend keepend
 
 " Decorators
 syntax match   jsDecorator                    /^\s*@/ nextgroup=jsDecoratorFunction
@@ -227,8 +237,8 @@ if exists("javascript_plugin_flow")
   runtime extras/flow.vim
 endif
 
-syntax cluster jsExpression  contains=jsBracket,jsParen,jsObject,jsBlock,jsTernaryIf,jsTaggedTemplate,jsTemplateString,jsString,jsRegexpString,jsNumber,jsFloat,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsFutureKeys,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsFuncCall,jsUndefined,jsNan,jsPrototype,jsBuiltins,jsNoise,jsClassDefinition,jsArrowFunction,jsArrowFuncArgs,jsParensError,jsComment,jsArguments,jsThis,jsSuper,jsDo
-syntax cluster jsAll         contains=@jsExpression,jsExportContainer,jsImportContainer,jsStorageClass,jsConditional,jsRepeat,jsReturn,jsStatement,jsException,jsTry,jsAsyncKeyword
+syntax cluster jsExpression  contains=jsBracket,jsParen,jsObject,jsTernaryIf,jsTaggedTemplate,jsTemplateString,jsString,jsRegexpString,jsNumber,jsFloat,jsOperator,jsBooleanTrue,jsBooleanFalse,jsNull,jsFunction,jsArrowFunction,jsGlobalObjects,jsExceptions,jsFutureKeys,jsDomErrNo,jsDomNodeConsts,jsHtmlEvents,jsFuncCall,jsUndefined,jsNan,jsPrototype,jsBuiltins,jsNoise,jsClassDefinition,jsArrowFunction,jsArrowFuncArgs,jsParensError,jsComment,jsArguments,jsThis,jsSuper,jsDo,jsForAwait,jsAsyncKeyword
+syntax cluster jsAll         contains=@jsExpression,jsStorageClass,jsConditional,jsRepeat,jsReturn,jsStatement,jsException,jsTry,jsNoise,jsBlockLabel
 
 " Define the default highlighting.
 " For version 5.7 and earlier: only when not done already
@@ -290,7 +300,8 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsOperator             Operator
   HiLink jsOf                   Operator
   HiLink jsStorageClass         StorageClass
-  HiLink jsClassKeywords        Keyword
+  HiLink jsClassKeyword         Keyword
+  HiLink jsExtendsKeyword       Keyword
   HiLink jsThis                 Special
   HiLink jsSuper                Constant
   HiLink jsNan                  Number
@@ -309,30 +320,32 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsFuncParens           Noise
   HiLink jsClassBraces          Noise
   HiLink jsClassNoise           Noise
-  HiLink jsIfElseBraces         jsBraces
-  HiLink jsTryCatchBraces       jsBraces
-  HiLink jsModuleBraces         jsBraces
+  HiLink jsIfElseBraces         Noise
+  HiLink jsTryCatchBraces       Noise
+  HiLink jsModuleBraces         Noise
   HiLink jsObjectBraces         Noise
   HiLink jsObjectSeparator      Noise
-  HiLink jsFinallyBraces        jsBraces
-  HiLink jsRepeatBraces         jsBraces
-  HiLink jsSwitchBraces         jsBraces
-  HiLink jsExportBraces         jsBraces
+  HiLink jsFinallyBraces        Noise
+  HiLink jsRepeatBraces         Noise
+  HiLink jsSwitchBraces         Noise
   HiLink jsSpecial              Special
-  HiLink jsTemplateVar          Special
-  HiLink jsTemplateBraces       jsBraces
+  HiLink jsTemplateBraces       Noise
   HiLink jsGlobalObjects        Constant
   HiLink jsGlobalNodeObjects    Constant
   HiLink jsExceptions           Constant
   HiLink jsBuiltins             Constant
-  HiLink jsModuleKeywords       Include
-  HiLink jsModuleOperators      Include
-  HiLink jsModuleDefault        Include
+  HiLink jsImport               Include
+  HiLink jsExport               Include
+  HiLink jsExportDefault        StorageClass
+  HiLink jsExportDefaultGroup   jsExportDefault
+  HiLink jsModuleAs             Include
+  HiLink jsModuleComma          jsNoise
+  HiLink jsModuleAsterisk       Noise
+  HiLink jsFrom                 Include
   HiLink jsDecorator            Special
   HiLink jsDecoratorFunction    Function
   HiLink jsParensDecorator      jsParens
   HiLink jsFuncArgOperator      jsFuncArgs
-  HiLink jsModuleAsterisk       Noise
   HiLink jsClassProperty        jsObjectKey
   HiLink jsSpreadOperator       Operator
   HiLink jsRestOperator         Operator
@@ -341,6 +354,8 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsClassMethodType      Type
   HiLink jsObjectMethodType     Type
   HiLink jsClassDefinition      jsFuncName
+  HiLink jsBlockLabel           Identifier
+  HiLink jsBlockLabelKey        jsBlockLabel
 
   HiLink jsDestructuringBraces     Noise
   HiLink jsDestructuringProperty   jsFuncArgs
@@ -349,7 +364,8 @@ if version >= 508 || !exists("did_javascript_syn_inits")
 
   HiLink jsCommentFunction      jsComment
   HiLink jsCommentClass         jsComment
-  HiLink jsCommentMisc          jsComment
+  HiLink jsCommentIfElse        jsComment
+  HiLink jsCommentRepeat        jsComment
 
   HiLink jsDomErrNo             Constant
   HiLink jsDomNodeConsts        Constant
@@ -366,7 +382,7 @@ if version >= 508 || !exists("did_javascript_syn_inits")
 endif
 
 " Define the htmlJavaScript for HTML syntax html.vim
-syntax cluster  htmlJavaScript       contains=@jsAll
+syntax cluster  htmlJavaScript       contains=@jsAll,jsImport,jsExport
 syntax cluster  javaScriptExpression contains=@jsAll
 
 " Vim's default html.vim highlights all javascript as 'Special'