WebGLRenderingContext: getVertexAttrib() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

Note: This feature is available in Web Workers.

The WebGLRenderingContext.getVertexAttrib() method of the WebGL API returns information about a vertex attribute at a given position.

getVertexAttrib(index, pname)

A GLuint specifying the index of the vertex attribute.

A GLenum specifying the information to query. Possible values:

Returns the currently bound WebGLBuffer.

Returns a GLboolean that is true if the vertex attribute is enabled at this index. Otherwise false.

Returns a GLint indicating the size of an element of the vertex array.

Returns a GLint indicating the number of bytes between successive elements in the array. 0 means that the elements are sequential.

Returns a GLenum representing the array type. One of

Returns a GLboolean that is true if fixed-point data types are normalized for the vertex attribute array at the given index.

Returns a Float32Array (with 4 elements) representing the current value of the vertex attribute at the given index.

When using a WebGL 2 context, the following values are available additionally:

gl.VERTEX_ATTRIB_ARRAY_INTEGER: Returns a GLboolean indicating whether an integer data type is in the vertex attribute array at the given index.
gl.VERTEX_ATTRIB_ARRAY_DIVISOR: Returns a GLint describing the frequency divisor used for instanced rendering.

When using the ANGLE_instanced_arrays extension:

ext.VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE: Returns a GLint describing the frequency divisor used for instanced rendering.

Returns the requested vertex attribute information (as specified with pname).

gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING);

Specification
WebGL Specification # 5.14.10
WebGL 2.0 Specification # 3.7.8

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