This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The WebGL2RenderingContext.getUniformBlockIndex() method of the WebGL 2 API retrieves the index of a uniform block within a WebGLProgram.


GLuint gl.getUniformBlockIndex(program, uniformBlockName);


A WebGLProgram containing the uniform block.
A DOMString specifying the name of the uniform block to whose index to retrieve.

Return value

A GLuint indicating the uniform block index.


var blockIndex = gl.getUniformBlockIndex(program, 'UBOData');


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

Browser compatibility

FeatureChromeFirefoxEdgeInternet ExplorerOperaSafari
Basic Support5651.0(No)(No)43(No)
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic Support(No)(No)(No)(No)(No)(No)(No)

See also

Document Tags and Contributors

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