The WebGL2RenderingContext.getActiveUniformBlockName() method of the WebGL 2 API retrieves the name of the active uniform block at a given index within a WebGLProgram.
The WebGL2RenderingContext.getActiveUniformBlockParameter() method of the WebGL 2 API retrieves information about an active uniform block within a WebGLProgram.
The WebGL2RenderingContext.getBufferSubData() method of the WebGL 2 API reads data from a buffer binding point and writes them to an ArrayBuffer or SharedArrayBuffer.
The WebGL2RenderingContext.getInternalformatParameter() method of the WebGL 2 API returns information about implementation-dependent support for internal formats.
The WebGL2RenderingContext.getTransformFeedbackVarying() method of the WebGL 2 API returns information about varying variables from WebGLTransformFeedback buffers.