element-gui/lib/utils/ie.js

A Component Library for Vue.js.

'use strict';

exports.__esModule = true;
exports.isFindIndex = isFindIndex;
exports.isArrFind = isArrFind;
exports.isArrForm = isArrForm;
exports.isObjEntries = isObjEntries;
function isFindIndex() {
  /*eslint no-extend-native: ["error", { "exceptions": ["Array"] }]*/
  if (!Array.prototype.findIndex) {
    Object.defineProperty(Array.prototype, 'findIndex', {
      value: function value(predicate) {
        // 1. Let O be ? ToObject(this value).
        if (this == null) {
          throw new TypeError('"this" is null or not defined');
        }
        var o = Object(this);
        // 2. Let len be ? ToLength(? Get(O, "length")).
        var len = o.length >>> 0;
        // 3. If IsCallable(predicate) is false, throw a TypeError exception.
        if (typeof predicate !== 'function') {
          throw new TypeError('predicate must be a function');
        }
        // 4. If thisArg was supplied, let T be thisArg; else let T be undefined.
        var thisArg = arguments[1];
        // 5. Let k be 0.
        var k = 0;
        // 6. Repeat, while k < len
        while (k < len) {
          // a. Let Pk be ! ToString(k).
          // b. Let kValue be ? Get(O, Pk).
          // c. Let testResult be ToBoolean(? Call(predicate, T, « kValue, k, O »)).
          // d. If testResult is true, return k.
          var kValue = o[k];
          if (predicate.call(thisArg, kValue, k, o)) {
            return k;
          }
          // e. Increase k by 1.
          k++;
        }
        // 7. Return -1.
        return -1;
      }
    });
  }
}

function isArrFind() {
  if (!Array.prototype.find) {
    Array.prototype.find = function (callback) {
      return callback && (this.filter(callback) || [])[0];
    };
  }
}

function isArrForm() {
  if (!Array.from) {
    Array.from = function (el) {
      return Array.apply(this, el);
    };
  };
}

function isObjEntries() {
  if (!Object.entries) {
    Object.entries = function (obj) {
      var ownProps = Object.keys(obj),
          i = ownProps.length,
          resArray = new Array(i); // preallocate the Array
      while (i--) {
        resArray[i] = [ownProps[i], obj[ownProps[i]]];
      }
      return resArray;
    };
  };
}