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Editing: es.function.name.js
var DESCRIPTORS = require('../internals/descriptors'); var FUNCTION_NAME_EXISTS = require('../internals/function-name').EXISTS; var uncurryThis = require('../internals/function-uncurry-this'); var defineProperty = require('../internals/object-define-property').f; var FunctionPrototype = Function.prototype; var functionToString = uncurryThis(FunctionPrototype.toString); var nameRE = /function\b(?:\s|\/\*[\S\s]*?\*\/|\/\/[^\n\r]*[\n\r]+)*([^\s(/]*)/; var regExpExec = uncurryThis(nameRE.exec); var NAME = 'name'; // Function instances `.name` property // https://tc39.es/ecma262/#sec-function-instances-name if (DESCRIPTORS && !FUNCTION_NAME_EXISTS) { defineProperty(FunctionPrototype, NAME, { configurable: true, get: function () { try { return regExpExec(nameRE, functionToString(this))[1]; } catch (error) { return ''; } } }); }
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