The WebGLRenderingContext.getActiveAttrib() method of the WebGL API returns a WebGLActiveInfo object containing size, type, and name of a vertex attribute. It is generally used when querying unknown uniforms either for debugging or generic library creation.


WebGLActiveInfo gl.getActiveAttrib(program,index);


A WebGLProgram containing the vertex attribute.
A GLuint specifying the index of the vertex attribute to get. This value is an index 0 to N - 1 as returned by gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES).

Return value

A WebGLActiveInfo object.


const numAttribs = gl.getProgramParameter(program, gl.ACTIVE_ATTRIBUTES);
for (let i = 0; i < numAttribs; ++i) {
  const info = gl.getActiveAttrib(program, i); 
  console.log('name:', info.name, 'type:', info.type, 'size:', info.size); 


Specification Status Comment
WebGL 1.0
The definition of 'getActiveAttrib' in that specification.
Recommendation Initial definition.
OpenGL ES 2.0
The definition of 'glGetActiveAttrib' in that specification.
Standard Man page of the OpenGL API.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support912411125.1
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes25 Yes Yes128.1 Yes

See also

Document Tags and Contributors

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