chroma-js/src/utils/unpack.js

JavaScript library for color conversions

import type from './type.js';

export default (args, keyOrder = null) => {
    // if called with more than 3 arguments, we return the arguments
    if (args.length >= 3) return Array.prototype.slice.call(args);
    // with less than 3 args we check if first arg is object
    // and use the keyOrder string to extract and sort properties
    if (type(args[0]) == 'object' && keyOrder) {
        return keyOrder
            .split('')
            .filter((k) => args[0][k] !== undefined)
            .map((k) => args[0][k]);
    }
    // otherwise we just return the first argument
    // (which we suppose is an array of args)
    return args[0].slice(0);
};