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.
Obsolete since Gecko 58 (Firefox 58 / Thunderbird 58 / SeaMonkey 2.55)
This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.
function* expression.The function keyword can be used to define a legacy generator function inside an expression. To make the function a legacy generator, the function body should contain at least one yield expression.
Syntax
function [name]([param1[, param2[, ..., paramN]]]) {
statements
}
Parameters
name- The function name. Can be omitted, in which case the function is anonymous. The name is only local to the function body.
paramN- The name of an argument to be passed to the function. A function can have up to 255 arguments.
statements- The statements which comprise the body of the function. This should contain at least one
yieldexpression.
Description
An overview of the usage is available on the Iterators and Generators page.
Browser compatibility
| Desktop | Mobile | Server | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | Node.js | |
| Basic support | Chrome No support No | Edge No support No | Firefox No support 2 — 58 | IE No support No | Opera No support No | Safari No support No | WebView Android No support No | Chrome Android No support No | Edge Mobile No support No | Firefox Android No support 4 — 58 | Opera Android No support No | Safari iOS No support No | Samsung Internet Android No support No | nodejs No support No |
Legend
- No support
- No support
- Non-standard. Expect poor cross-browser support.
- Non-standard. Expect poor cross-browser support.
- Deprecated. Not for use in new websites.
- Deprecated. Not for use in new websites.