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

index

A GLuint specifying the index of the vertex attribute.

pname

A GLenum specifying the information to query. Possible values:

gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING

Returns the currently bound WebGLBuffer.

gl.VERTEX_ATTRIB_ARRAY_ENABLED

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

gl.VERTEX_ATTRIB_ARRAY_SIZE

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

gl.VERTEX_ATTRIB_ARRAY_STRIDE

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

gl.VERTEX_ATTRIB_ARRAY_TYPE

Returns a GLenum representing the array type. One of

• gl.BYTE
• gl.UNSIGNED_BYTE
• gl.SHORT,
• gl.UNSIGNED_SHORT
• gl.FLOAT

gl.VERTEX_ATTRIB_ARRAY_NORMALIZED

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

gl.CURRENT_VERTEX_ATTRIB

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).

• WebGLRenderingContext.getVertexAttribOffset()
• ANGLE_instanced_arrays