25 lines
652 B
JavaScript
25 lines
652 B
JavaScript
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var dP = require('./_object-dp').f
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, createDesc = require('./_property-desc')
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, has = require('./_has')
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, FProto = Function.prototype
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, nameRE = /^\s*function ([^ (]*)/
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, NAME = 'name';
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var isExtensible = Object.isExtensible || function(){
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return true;
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};
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// 19.2.4.2 name
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NAME in FProto || require('./_descriptors') && dP(FProto, NAME, {
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configurable: true,
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get: function(){
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try {
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var that = this
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, name = ('' + that).match(nameRE)[1];
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has(that, NAME) || !isExtensible(that) || dP(that, NAME, createDesc(5, name));
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return name;
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} catch(e){
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return '';
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}
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}
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});
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