debian-mirror-gitlab/core-js/modules/es.function.name.js
2019-09-25 13:30:05 +05:30

22 lines
680 B
JavaScript

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