Last change
on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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File size:
673 bytes
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[6a3a178] | 1 | var DESCRIPTORS = require('../internals/descriptors');
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| 2 | var defineProperty = require('../internals/object-define-property').f;
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| 3 |
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| 4 | var FunctionPrototype = Function.prototype;
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| 5 | var FunctionPrototypeToString = FunctionPrototype.toString;
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| 6 | var nameRE = /^\s*function ([^ (]*)/;
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| 7 | var NAME = 'name';
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| 8 |
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| 9 | // Function instances `.name` property
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| 10 | // https://tc39.es/ecma262/#sec-function-instances-name
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| 11 | if (DESCRIPTORS && !(NAME in FunctionPrototype)) {
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| 12 | defineProperty(FunctionPrototype, NAME, {
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| 13 | configurable: true,
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| 14 | get: function () {
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| 15 | try {
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| 16 | return FunctionPrototypeToString.call(this).match(nameRE)[1];
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| 17 | } catch (error) {
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| 18 | return '';
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| 19 | }
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| 20 | }
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| 21 | });
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| 22 | }
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