carbon-components/es/globals/js/misc/mixin.js

Carbon Components is a component library for IBM Cloud

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }

/**
 * @param {Array} a An array.
 * @returns {Array} The flattened version of the given array.
 */
function flatten(a) {
  return a.reduce(function (result, item) {
    if (Array.isArray(item)) {
      result.push.apply(result, _toConsumableArray(flatten(item)));
    } else {
      result.push(item);
    }
    return result;
  }, []);
}

/**
 * An interface for defining mix-in classes. Used with {@link mixin}.
 * @function mixinfn
 * @param {Class} ToMix The class to mix.
 * @returns {Class} The class mixed-in with the given ToMix class.
 */

/**
 * @function mixin
 * @param {...mixinfn} mixinfns The functions generating mix-ins.
 * @returns {Class} The class generated with the given mix-ins.
 */
export default function mixin() {
  for (var _len = arguments.length, mixinfns = Array(_len), _key = 0; _key < _len; _key++) {
    mixinfns[_key] = arguments[_key];
  }

  return flatten(mixinfns).reduce(function (Class, mixinfn) {
    return mixinfn(Class);
  }, function () {
    function _class() {
      _classCallCheck(this, _class);
    }

    return _class;
  }());
}