style: replace Number/String/parseInt/parseFloat with shorter equivalents

Replace Number(x) with +x, String(x) with template literal,
parseInt(x, 10) with +, and parseFloat(x || "0") with +(x ?? 0).
Fix operator precedence with parentheses around ?? expressions.

src/components/leaflet-control-scale.ts

@@ -16,7 +16,7 @@ export default class LeafletControlScale extends WithProps(HTMLElement, PROPS) {
   connectedCallback() {
     this.#obj = new Control.Scale({
       position: this.getAttribute('position') as ControlPosition | undefined,
-      maxWidth: parseInt(this.getAttribute('max-width') ?? '100', 10),
+      maxWidth: +(this.getAttribute('max-width') ?? 100),
       metric: !this.hasAttribute('metric') || this.getAttribute('metric') !== 'false',
       imperial: !this.hasAttribute('imperial') || this.getAttribute('imperial') !== 'false',
       updateWhenIdle:

src/components/leaflet-line.ts

@@ -4,10 +4,7 @@ export default class LeafletLine extends HTMLElement {
   }
 
   get latlng(): [number, number] {
-    return [
-      parseFloat(this.getAttribute('lat') || '0'),
-      parseFloat(this.getAttribute('lng') || '0'),
-    ];
+    return [+(this.getAttribute('lat') ?? 0), +(this.getAttribute('lng') ?? 0)];
   }
 
   attributeChangedCallback() {

src/components/leaflet-map.ts

@@ -113,13 +113,13 @@ export default class LeafletMap extends TypedBase {
         Object.defineProperty(LeafletMap.prototype, propName, {
           get(this: LeafletMap) {
             const val = spec.mapGet && this.#map ? spec.mapGet(this.#map) : undefined;
-            return val !== undefined ? val : Number(this.getAttribute(spec.attr) ?? spec.default);
+            return val !== undefined ? val : +(this.getAttribute(spec.attr) ?? spec.default);
           },
           set(this: LeafletMap, v: number) {
             if (spec.event) {
-              this.#syncAttr(spec.attr, String(v));
+              this.#syncAttr(spec.attr, `${v}`);
             } else {
-              this.setAttribute(spec.attr, String(v));
+              this.setAttribute(spec.attr, `${v}`);
             }
           },
           configurable: true,
@@ -166,9 +166,9 @@ export default class LeafletMap extends TypedBase {
 
     // Read view-state from attributes directly — the getters call getCenter()/getZoom()
     // which throw if invoked before setView(), so we can't use them here.
-    const lat = Number(this.getAttribute('lat') ?? 0);
-    const lng = Number(this.getAttribute('lng') ?? 0);
-    const zoom = Number(this.getAttribute('zoom') ?? 2);
+    const lat = +(this.getAttribute('lat') ?? 0);
+    const lng = +(this.getAttribute('lng') ?? 0);
+    const zoom = +(this.getAttribute('zoom') ?? 2);
 
     // Assign #map only after setView so the getters' `this.#map` guard is
     // equivalent to "map is ready" — getCenter()/getZoom() throw before setView.
@@ -193,7 +193,7 @@ export default class LeafletMap extends TypedBase {
         for (const s of specs) {
           if (this.#map && s.mapGet) {
             const v = s.mapGet(this.#map);
-            if (v !== undefined) this.#syncAttr(s.attr, String(v));
+            if (v !== undefined) this.#syncAttr(s.attr, `${v}`);
           }
         }
       };
@@ -233,7 +233,7 @@ export default class LeafletMap extends TypedBase {
     if (!propName) return;
     const spec = PROPS[propName] as PropDef;
     if (spec.kind === 'num') {
-      if (spec.mapSet && newValue !== null) spec.mapSet(this.#map, Number(newValue));
+      if (spec.mapSet && newValue !== null) spec.mapSet(this.#map, +newValue);
     } else if (spec.kind === 'bool-off') {
       spec.mapSet?.(this.#map, newValue === null);
     }
@@ -292,7 +292,7 @@ export default class LeafletMap extends TypedBase {
       if (spec.kind === 'num') {
         if (spec.viewState) continue;
         const v = this.getAttribute(spec.attr);
-        if (v !== null) o[propName] = Number(v);
+        if (v !== null) o[propName] = +v;
       } else if (spec.kind === 'bool-off') {
         if (this.hasAttribute(spec.attr)) o[propName] = false;
       } else {

src/components/leaflet-marker.ts

@@ -57,8 +57,8 @@ export default class LeafletMarker extends WithProps(HTMLElement, PROPS) {
     if (!this.#obj || this.#syncing) return;
     this.#syncing = true;
     const pos = this.#obj.getLatLng();
-    this.setAttribute('lat', String(pos.lat));
-    this.setAttribute('lng', String(pos.lng));
+    this.setAttribute('lat', `${pos.lat}`);
+    this.setAttribute('lng', `${pos.lng}`);
     this.#syncing = false;
   };
 }

src/core/utils.ts

@@ -31,14 +31,14 @@ function definePropAccessors(proto: object, props: Record<string, PropDef>) {
       get() {
         const el = this as HTMLElement;
         const val = el.getAttribute(spec.attr);
-        if (spec.kind === 'num') return val !== null ? Number(val) : spec.default;
+        if (spec.kind === 'num') return val !== null ? +val : spec.default;
         if (spec.kind === 'bool-on') return el.hasAttribute(spec.attr);
         return val ?? (spec as { default: string }).default;
       },
       set(v: unknown) {
         const el = this as HTMLElement;
         if (spec.kind === 'bool-on') el.toggleAttribute(spec.attr, !!v);
-        else el.setAttribute(spec.attr, String(v));
+        else el.setAttribute(spec.attr, `${v}`);
       },
       configurable: true,
       enumerable: true,
@@ -51,7 +51,7 @@ function definePropAccessors(proto: object, props: Record<string, PropDef>) {
 // reading lat/lng/radius/opacity with a guaranteed number return.
 export function numAttr(el: HTMLElement, props: Record<string, PropDef>, name: string): number {
   const v = el.getAttribute(name);
-  if (v !== null) return Number(v);
+  if (v !== null) return +v;
   return (props[name] as { default: number }).default;
 }
 
@@ -107,7 +107,7 @@ export function parseAttributeValue(value: string | null): unknown {
   if (value === null) return null;
   if (value === 'true') return true;
   if (value === 'false') return false;
-  const num = Number(value);
+  const num = +value;
   if (!isNaN(num) && value !== '') return num;
   try {
     return JSON.parse(value);
@@ -143,7 +143,7 @@ export function buildOptions<
       if ('default' in spec && spec.default !== '') opts[propName] = spec.default;
       continue;
     }
-    if (spec.kind === 'num') opts[propName] = Number(val);
+    if (spec.kind === 'num') opts[propName] = +val;
     else if (spec.kind === 'bool-on') opts[propName] = true;
     else if (spec.kind === 'bool-off') opts[propName] = false;
     else opts[propName] = val;