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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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support No No5 — 58 No No No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic support No No No5 — 58 No No No

See also

문서 태그 및 공헌자

 최종 변경: fscholz,