35 lines
916 B
JavaScript
35 lines
916 B
JavaScript
'use strict';
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var supportsDescriptors = require('define-properties').supportsDescriptors;
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var functionsHaveNames = require('functions-have-names')();
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var getPolyfill = require('./polyfill');
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var defineProperty = Object.defineProperty;
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var TypeErr = TypeError;
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module.exports = function shimName() {
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var polyfill = getPolyfill();
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if (functionsHaveNames) {
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return polyfill;
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}
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if (!supportsDescriptors) {
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throw new TypeErr('Shimming Function.prototype.name support requires ES5 property descriptor support.');
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}
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var functionProto = Function.prototype;
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defineProperty(functionProto, 'name', {
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configurable: true,
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enumerable: false,
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get: function () {
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var name = polyfill.call(this);
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if (this !== functionProto) {
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defineProperty(this, 'name', {
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configurable: true,
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enumerable: false,
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value: name,
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writable: false
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});
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}
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return name;
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}
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});
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return polyfill;
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};
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