The ANGLE_instanced_arrays extension is part of the WebGL API
allows to draw the same object, or groups of similar objects
times, if they share the same vertex data, primitive count and

web.gl-ext interfaces.

The EXT_disjoint_timer_query extension is part of the WebGL API
provides a way to measure the duration of a set of GL commands,
stalling the rendering pipeline.

The OES_vertex_array_object extension is part of the WebGL API
provides vertex array objects (VAOs) which encapsulate vertex
states. These objects keep pointers to vertex data and provide
for different sets of vertex data.

The WEBGL_compressed_texture_astc extension is part of the WebGL
and exposes Adaptive Scalable Texture Compression (ASTC) compressed
formats to WebGL.

The WEBGL_debug_shaders extension is part of the WebGL API and
a method to debug shaders from privileged contexts.

The WEBGL_draw_buffers extension is part of the WebGL API and
a fragment shader to write to several textures, which is useful
deferred shading, for example.

The WEBGL_lose_context extension is part of the WebGL API and
functions to simulate losing and restoring a `web.gl.WebGLRenderingContext`.

web.gl interfaces.

The WebGL2RenderingContext interface provides the OpenGL ES 3.0
context for the drawing surface of an HTML `<canvas>` element.

The WebGLActiveInfo interface is part of the WebGL API and represents
information returned by calling the `WebGLRenderingContext.getActiveAttrib()`
`WebGLRenderingContext.getActiveUniform()` methods.

The WebContextEvent interface is part of the WebGL API and is
interface for an event that is generated in response to a status
to the WebGL rendering context.

The WebGLRenderingContext interface provides an interface to
OpenGL ES 2.0 graphics rendering context for the drawing surface
an HTML `<canvas>` element.

The WebGLShaderPrecisionFormat interface is part of the WebGL
and represents the information returned by calling the `WebGLRenderingContext.getShaderPrecisionFormat()`