GitHub - JamesMGreene/Function.name: Polyfill for ECMAScript 6's Function.name. (original) (raw)
Function.name
Overview
A polyfill for the basic functionality of Function.name accessor property in its pre-ES6 form.
Usage
Named function declarations
function hello() { /* ... */ } console.log(hello.name); // "hello"
Named function expressions
var fn = function foo() { /* ... */ }; console.log(fn.name); // "foo"
Browser Compatibility
Most modern browsers have already supported this basic functionality for quite some time but this polyfill will apply to at least the following:
- IE
>=9 <12 - Chrome
<33
For IE <9, you can still use fn._name() instead.
Caveats
Pre-ES6 Form
- In short, this means that this polyfilled
nameaccessor property can provide you with the name of a named function definition (either a named function declaration or a named function expression). - Unlike other browsers with a similar support level for the pre-ES6 form, this poyfilled
nameaccessor property is also intentionally marked as configurable.
Chrome <5
- When polyfilling for Chrome
<5, the accessor property will be configurable (expected) AND enumerable (unexpected) due to having to implement it using Object.prototype.__defineGetter__ instead of Object.defineProperty.