3137ee4946
* refactor: add pure hexToRgb helper that handles #rgb shorthand * fix: handle #rgb shorthand hex in theme color parsing * test: hexToRgb expands shorthand and rejects invalid input
15 lines
589 B
JavaScript
15 lines
589 B
JavaScript
// static/js/color/hex.js
|
|
//
|
|
// Parse a CSS hex color into {r, g, b}. Pure — no DOM — so it can be reused
|
|
// across modules and unit-tested under node.
|
|
|
|
// Accepts "#rgb", "#rrggbb" (with or without the leading '#'). Returns null
|
|
// for anything that isn't a valid 3- or 6-digit hex color.
|
|
export function hexToRgb(hex) {
|
|
let h = String(hex || '').trim().replace(/^#/, '');
|
|
if (h.length === 3) h = h.split('').map((c) => c + c).join('');
|
|
if (!/^[0-9a-fA-F]{6}$/.test(h)) return null;
|
|
const n = parseInt(h, 16);
|
|
return { r: (n >> 16) & 255, g: (n >> 8) & 255, b: n & 255 };
|
|
}
|