This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The WebGL2RenderingContext.isTransformFeedback() method of the WebGL 2 API returns true if the passed object is a valid WebGLTransformFeedback object.


GLboolean gl.isTransformFeedback(transformFeedback);


A WebGLTransformFeedback object to test.

Return value

A GLboolean indicating whether the given object is a valid WebGLTransformFeedback object (true) or not (false).


gl must be a WebGL2RenderingContext. WebGLTransformFeedback objects are not available in WebGL 1.

var transformFeedback = gl.createTransformFeedback();

// ...



Specification Status Comment
WebGL 2.0
The definition of 'isTransformFeedback' in that specification.
Editor's Draft Initial definition for WebGL.
OpenGL ES 3.0
The definition of 'glIsTransformFeedback' in that specification.
Standard Man page of the (similar) OpenGL API.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support56 No51 No43 No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support5858 No5143 No7.0

See also

Document Tags and Contributors

Contributors to this page: fscholz, teoli
Last updated by: fscholz,