Convert hex to rgb

JavaScript version
const hexToRgb = (hex) =>
hex
.replace(/^#?([a-f\d])([a-f\d])([a-f\d])$/i, (_, r, g, b) => `#${r}${r}${g}${g}${b}${b}`)
.substring(1)
.match(/.{2}/g)
.map((x) => parseInt(x, 16));
TypeScript version
const hexToRgb = (hex: string): string =>
hex
.replace(/^#?([a-f\d])([a-f\d])([a-f\d])$/i, (_, r, g, b) => `#${r}${r}${g}${g}${b}${b}`)
.substring(1)
.match(/.{2}/g)
.map((x) => parseInt(x, 16));
Examples
hexToRgb('#00ffff'); // [0, 255, 255]
hexToRgb('#0ff'); // [0, 255, 255]