chroma-js/src/io/css/lab2css.js

JavaScript library for color conversions

import { unpack, last, rnd2 } from '../../utils/index.js';

/*
 * supported arguments:
 * - lab2css(l,a,b)
 * - lab2css(l,a,b,alpha)
 * - lab2css([l,a,b], mode)
 * - lab2css([l,a,b,alpha], mode)
 */
const lab2css = (...args) => {
    const laba = unpack(args, 'lab');
    let mode = last(args) || 'lab';
    laba[0] = rnd2(laba[0]) + '%';
    laba[1] = rnd2(laba[1]);
    laba[2] = rnd2(laba[2]);
    if (mode === 'laba' || (laba.length > 3 && laba[3] < 1)) {
        laba[3] = '/ ' + (laba.length > 3 ? laba[3] : 1);
    } else {
        laba.length = 3;
    }
    return `lab(${laba.join(' ')})`;
};

export default lab2css;