@houshuang/react-flip-move/lib/polyfills.js

Effortless animation between DOM changes (eg. list reordering) using the FLIP technique.

'use strict';

// @noflow
/**
 * React Flip Move - Polyfills
 * (c) 2016-present Joshua Comeau
 */

/* eslint-disable */

if (!Array.prototype.find) {
  Array.prototype.find = function (predicate) {
    if (this === null) {
      throw new TypeError('Array.prototype.find called on null or undefined');
    }
    if (typeof predicate !== 'function') {
      throw new TypeError('predicate must be a function');
    }
    var list = Object(this);
    var length = list.length >>> 0;
    var thisArg = arguments[1];
    var value = void 0;

    for (var i = 0; i < length; i++) {
      value = list[i];
      if (predicate.call(thisArg, value, i, list)) {
        return value;
      }
    }
    return undefined;
  };
}

if (!Array.prototype.every) {
  Array.prototype.every = function (callbackfn, thisArg) {
    'use strict';

    var T, k;

    if (this == null) {
      throw new TypeError('this is null or not defined');
    }

    var O = Object(this);
    var len = O.length >>> 0;

    if (typeof callbackfn !== 'function') {
      throw new TypeError();
    }

    if (arguments.length > 1) {
      T = thisArg;
    }

    k = 0;

    while (k < len) {

      var kValue;

      if (k in O) {
        kValue = O[k];

        var testResult = callbackfn.call(T, kValue, k, O);

        if (!testResult) {
          return false;
        }
      }
      k++;
    }
    return true;
  };
}

if (!Array.isArray) {
  Array.isArray = function (arg) {
    return Object.prototype.toString.call(arg) === '[object Array]';
  };
}