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22 lines
680 B
22 lines
680 B
var DESCRIPTORS = require('../internals/descriptors'); |
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var defineProperty = require('../internals/object-define-property').f; |
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var FunctionPrototype = Function.prototype; |
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var FunctionPrototypeToString = FunctionPrototype.toString; |
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var nameRE = /^\s*function ([^ (]*)/; |
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var NAME = 'name'; |
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// Function instances `.name` property |
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// https://tc39.github.io/ecma262/#sec-function-instances-name |
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if (DESCRIPTORS && !(NAME in FunctionPrototype)) { |
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defineProperty(FunctionPrototype, NAME, { |
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configurable: true, |
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get: function () { |
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try { |
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return FunctionPrototypeToString.call(this).match(nameRE)[1]; |
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} catch (error) { |
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return ''; |
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} |
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} |
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}); |
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}
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