Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
The non-standard isGenerator()
method used to determine whether or not a function is a generator. It has been removed from Firefox starting with version 58.
Syntax
fun.isGenerator()
Return value
A Boolean
indicating whether or not the given function is a generator.
Description
The isGenerator()
method determines whether or not the function fun
is a generator. It was part of an early Harmony proposal, but has not been included in the ECMAScript 2015 specification.
Examples
function f() {} function* g() { yield 42; } console.log('f.isGenerator() = ' + f.isGenerator()); // f.isGenerator() = false console.log('g.isGenerator() = ' + g.isGenerator()); // g.isGenerator() = true
Specifications
Not part of any specification. Implemented in JavaScript 1.8.6.
Browser compatibility
Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|---|
Basic support | No | No | 5 — 58 | No | No | No |
Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | IE mobile | Opera Android | iOS Safari |
---|---|---|---|---|---|---|---|
Basic support | No | No | No | 5 — 58 | No | No | No |