WebGL2RenderingContext: getFragDataLocation() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.

See full compatibility

Note: This feature is available in Web Workers.

The WebGL2RenderingContext.getFragDataLocation() method of the WebGL 2 API returns the binding of color numbers to user-defined varying out variables.

Syntax

getFragDataLocation(program, name)

Parameters

program: A WebGLProgram to query.
name: A string specifying the name of the user-defined varying out variable.

Return value

A GLint indicating the assigned color number binding, or -1 otherwise.

Examples

// program is a linked WebGLProgram

gl.getFragDataLocation(program, "fragColor");

Specifications

Specification
WebGL 2.0 Specification # 3.7.7

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`getFragDataLocation`	Chrome – Full support Chrome 56 (Release date: 2017-01-25) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 51 (Release date: 2017-01-24) footnote Full support	Opera – Full support Opera 43 (Release date: 2017-02-07) footnote Full support	Safari – Full support Safari 15 (Release date: 2021-09-20) footnote Full support	Chrome Android – Full support Chrome Android 58 (Release date: 2017-04-25) footnote Full support	Firefox for Android – Full support Firefox for Android 51 (Release date: 2017-01-24) footnote Full support	Opera Android – Full support Opera Android 43 (Release date: 2017-09-27) footnote Full support	Safari on iOS – Full support Safari on iOS 15 (Release date: 2021-09-20) footnote Full support	Samsung Internet – Full support Samsung Internet 7 (Release date: 2018-03-16) footnote Full support	WebView Android – Full support WebView Android 58 (Release date: 2017-04-25) footnote Full support	WebView on iOS – Full support WebView on iOS 15 (Release date: 2021-09-20) footnote Full support

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Full support: Full support