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