source: trip-planner-front/node_modules/function-bind/implementation.js@ ceaed42

Last change on this file since ceaed42 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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Line 
1'use strict';
2
3/* eslint no-invalid-this: 1 */
4
5var ERROR_MESSAGE = 'Function.prototype.bind called on incompatible ';
6var slice = Array.prototype.slice;
7var toStr = Object.prototype.toString;
8var funcType = '[object Function]';
9
10module.exports = function bind(that) {
11 var target = this;
12 if (typeof target !== 'function' || toStr.call(target) !== funcType) {
13 throw new TypeError(ERROR_MESSAGE + target);
14 }
15 var args = slice.call(arguments, 1);
16
17 var bound;
18 var binder = function () {
19 if (this instanceof bound) {
20 var result = target.apply(
21 this,
22 args.concat(slice.call(arguments))
23 );
24 if (Object(result) === result) {
25 return result;
26 }
27 return this;
28 } else {
29 return target.apply(
30 that,
31 args.concat(slice.call(arguments))
32 );
33 }
34 };
35
36 var boundLength = Math.max(0, target.length - args.length);
37 var boundArgs = [];
38 for (var i = 0; i < boundLength; i++) {
39 boundArgs.push('$' + i);
40 }
41
42 bound = Function('binder', 'return function (' + boundArgs.join(',') + '){ return binder.apply(this,arguments); }')(binder);
43
44 if (target.prototype) {
45 var Empty = function Empty() {};
46 Empty.prototype = target.prototype;
47 bound.prototype = new Empty();
48 Empty.prototype = null;
49 }
50
51 return bound;
52};
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