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.

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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