Web/API/WebGLRenderingContext/getVertexAttrib

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

Syntax

any gl.getVertexAttrib(index, pname);

Parameters

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 or not 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.

Return value

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

Examples

gl.getVertexAttrib(0, gl.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING);

Specifications

Specification	Status	Comment
WebGL 1.0The definition of 'getVertexAttrib' in that specification.	Recommendation	Initial definition for WebGL.
OpenGL ES 2.0The definition of 'glGetVertexAttrib' in that specification.	Standard	Man page of the OpenGL ES 2 API.
WebGL 2.0The definition of 'getVertexAttrib' in that specification.	Editor's Draft	Updated definition for WebGL 2.
OpenGL ES 3.0The definition of 'glGetVertexAttrib' in that specification.	Standard	Man page of the OpenGL ES 3 API.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`getVertexAttrib`	Chrome Full support 9	Edge Full support 12	Firefox Full support 4	IE Full support 11	Opera Full support 12	Safari Full support 5.1	WebView Android Full support Yes	Chrome Android Full support 25	Firefox Android Full support Yes	Opera Android Full support 12	Safari iOS Full support 8	Samsung Internet Android Full support 1.5
`WebGL2`	Chrome Full support 56	Edge Full support 79	Firefox Full support 51	IE No support No	Opera Full support 43	Safari No support No	WebView Android Full support 58	Chrome Android Full support 58	Firefox Android Full support 51	Opera Android Full support 43	Safari iOS No support No	Samsung Internet Android Full support 7.0

Legend

Full support: Full support
No support: No support