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Showing content from https://github.com/JamesMGreene/Function.name below:

JamesMGreene/Function.name: Polyfill for ECMAScript 6's `Function.name`.

A polyfill for the basic functionality of Function.name accessor property in its pre-ES6 form.

function hello() {
  /* ... */
}
console.log(hello.name);  // "hello"

var fn = function foo() {
  /* ... */
};
console.log(fn.name);  // "foo"

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.

• In short, this means that this polyfilled name accessor 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 name accessor property is also intentionally marked as configurable.

• 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.

• ES6 / ES2015 specification for Function.name

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