The WEBGL_lose_context.restoreContext() method is part of the WebGL API and allows you to simulate restoring the context of a WebGLRenderingContext object.
The WebGL2RenderingContext.beginQuery() method of the WebGL 2 API starts an asynchronous query. The target parameter indicates which kind of query to begin.
The WebGL2RenderingContext.bindBufferRange() method of the WebGL 2 API binds a range of a given WebGLBuffer to a given binding point (target) at a given index.
The WebGL2RenderingContext.clientWaitSync() method of the WebGL 2 API blocks and waits for a WebGLSync object to become signaled or a given timeout to be passed.
The WebGL2RenderingContext.compressedTexSubImage3D() method of the WebGL API specifies a three-dimensional sub-rectangle for a texture image in a compressed format.
The WebGL2RenderingContext.copyTexSubImage3D() method of the WebGL API copies pixels from the current WebGLFramebuffer into an existing 3D texture sub-image.
The WebGL2RenderingContext.createQuery() method of the WebGL 2 API creates and initializes WebGLQuery objects, which provide ways to asynchronously query for information.