| 'use strict'; |
| |
| var bind = require('function-bind'); |
| var GetIntrinsic = require('get-intrinsic'); |
| |
| var $apply = GetIntrinsic('%Function.prototype.apply%'); |
| var $call = GetIntrinsic('%Function.prototype.call%'); |
| var $reflectApply = GetIntrinsic('%Reflect.apply%', true) || bind.call($call, $apply); |
| |
| var $gOPD = GetIntrinsic('%Object.getOwnPropertyDescriptor%', true); |
| var $defineProperty = GetIntrinsic('%Object.defineProperty%', true); |
| var $max = GetIntrinsic('%Math.max%'); |
| |
| if ($defineProperty) { |
| try { |
| $defineProperty({}, 'a', { value: 1 }); |
| } catch (e) { |
| // IE 8 has a broken defineProperty |
| $defineProperty = null; |
| } |
| } |
| |
| module.exports = function callBind(originalFunction) { |
| var func = $reflectApply(bind, $call, arguments); |
| if ($gOPD && $defineProperty) { |
| var desc = $gOPD(func, 'length'); |
| if (desc.configurable) { |
| // original length, plus the receiver, minus any additional arguments (after the receiver) |
| $defineProperty( |
| func, |
| 'length', |
| { value: 1 + $max(0, originalFunction.length - (arguments.length - 1)) } |
| ); |
| } |
| } |
| return func; |
| }; |
| |
| var applyBind = function applyBind() { |
| return $reflectApply(bind, $apply, arguments); |
| }; |
| |
| if ($defineProperty) { |
| $defineProperty(module.exports, 'apply', { value: applyBind }); |
| } else { |
| module.exports.apply = applyBind; |
| } |