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 attributes 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

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
getActiveAttribChrome Full support 9Edge Full support 12Firefox Full support 4IE Full support 11Opera Full support 12Safari Full support 5.1WebView Android Full support YesChrome Android Full support 25Firefox Android Full support YesOpera Android Full support 12Safari iOS Full support 8Samsung Internet Android Full support 1.5


Full support
Full support

See also