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23 lines
501 B
TypeScript
23 lines
501 B
TypeScript
export function hexToRgba(hex: string, alpha = 1) {
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// Remove leading # if present
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hex = hex.replace(/^#/, '');
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// Handle shorthand (#fff → #ffffff)
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if (hex.length === 3) {
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hex = hex
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.split('')
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.map((c) => c + c)
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.join('');
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}
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if (hex.length !== 6) {
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throw new Error('Invalid HEX color.');
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}
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const r = parseInt(hex.substring(0, 2), 16);
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const g = parseInt(hex.substring(2, 4), 16);
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const b = parseInt(hex.substring(4, 6), 16);
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return `rgba(${r}, ${g}, ${b}, ${alpha})`;
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}
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