8865b49f4e
DSD, open/closed template, and light-DOM components that talk through <main-context>: children register on… callbacks and share updates as events. Served by Vite via npm run examples; examples/ is linted, formatted and typechecked.
104 lines
3.1 KiB
TypeScript
104 lines
3.1 KiB
TypeScript
import { WebComponent, choice, string } from '../src/index.ts';
|
|
import { share } from './main-context.ts';
|
|
import { SWATCHES, THEMES } from './themes.ts';
|
|
|
|
/**
|
|
* Light DOM radio group. The radios are real light-DOM `<input>`s, so arrow
|
|
* keys, focus and form behaviour are native. A pick is shared with the nearest
|
|
* `<main-context>` as a `theme` update.
|
|
*/
|
|
const SPEC = {
|
|
template: `
|
|
<fieldset>
|
|
<legend></legend>
|
|
<div class="swatches">
|
|
${THEMES.map(
|
|
(theme) => `
|
|
<label class="swatch" style="--swatch: ${SWATCHES[theme]}">
|
|
<input type="radio" value="${theme}">
|
|
<span>${theme}</span>
|
|
</label>`,
|
|
).join('')}
|
|
</div>
|
|
</fieldset>
|
|
`,
|
|
css: `
|
|
color-swatch-picker { display: block; font: 0.9rem/1.3 system-ui, sans-serif; }
|
|
color-swatch-picker fieldset { border: 0; margin: 0; padding: 0; }
|
|
color-swatch-picker legend { font-weight: 600; padding: 0; margin-bottom: 0.35rem; }
|
|
color-swatch-picker .swatches { display: flex; flex-wrap: wrap; gap: 0.5rem; }
|
|
color-swatch-picker .swatch {
|
|
position: relative;
|
|
display: grid;
|
|
place-items: end center;
|
|
width: 5.5rem;
|
|
height: 3.5rem;
|
|
padding-bottom: 0.3rem;
|
|
border-radius: 12px;
|
|
background: var(--swatch);
|
|
color: #fff;
|
|
font-weight: 600;
|
|
text-transform: capitalize;
|
|
text-shadow: 0 1px 2px rgb(0 0 0 / 35%);
|
|
cursor: pointer;
|
|
transition: transform 150ms ease, box-shadow 150ms ease;
|
|
}
|
|
color-swatch-picker .swatch:hover { transform: translateY(-2px); }
|
|
color-swatch-picker .swatch input { position: absolute; opacity: 0; pointer-events: none; }
|
|
color-swatch-picker .swatch:has(:checked) {
|
|
box-shadow: 0 0 0 3px var(--page, #fff), 0 0 0 5px var(--ink, #1d1d29);
|
|
}
|
|
color-swatch-picker .swatch:has(:focus-visible) {
|
|
outline: 2px solid #7c5cff;
|
|
outline-offset: 6px;
|
|
}
|
|
`,
|
|
events: {
|
|
change: true,
|
|
},
|
|
element: { legend: 'legend' },
|
|
elements: { radios: 'input[type=radio]' },
|
|
props: {
|
|
label: string({ default: 'Theme' }),
|
|
value: choice(THEMES, { default: 'sunset' }),
|
|
},
|
|
} as const;
|
|
|
|
// Each picker needs its own radio group name.
|
|
let count = 0;
|
|
|
|
export class ColorSwatchPicker extends WebComponent(SPEC) {
|
|
readonly #name = `color-swatch-picker-${(count += 1)}`;
|
|
|
|
override onConnect(): void {
|
|
for (const radio of this.refs.radios) radio.name = this.#name;
|
|
this.#render();
|
|
}
|
|
|
|
override onPropChange(): void {
|
|
this.#render();
|
|
}
|
|
|
|
override handleEvent(event: Event): void {
|
|
const radio = this.refs.radios.find((input) => input === event.target);
|
|
const theme = THEMES.find((name) => name === radio?.value);
|
|
if (theme && this.value !== theme) {
|
|
this.value = theme;
|
|
share(this, 'theme', theme);
|
|
}
|
|
}
|
|
|
|
#render(): void {
|
|
if (this.refs.legend) this.refs.legend.textContent = this.label;
|
|
for (const radio of this.refs.radios) radio.checked = radio.value === this.value;
|
|
}
|
|
}
|
|
|
|
customElements.define('color-swatch-picker', ColorSwatchPicker);
|
|
|
|
declare global {
|
|
interface HTMLElementTagNameMap {
|
|
'color-swatch-picker': ColorSwatchPicker;
|
|
}
|
|
}
|