The WebGLRenderingContext.getExtension() method enables a WebGL extension.

name

A String for the name of the WebGL extension to enable.

A WebGL extension object, or null if name does not match (case-insensitive) to one of the strings in WebGLRenderingContext.getSupportedExtensions.

Once a WebGL extension is enabled, you are able to use the methods, properties or constants that this extension object provides.

const canvas = document.getElementById("canvas");
gl = canvas.getContext("webgl");

gl.getExtension("WEBGL_lose_context").loseContext();

Extensions for the WebGL API are registered in the WebGL Extension Registry. They are also listed here.

• WebGLRenderingContext.getSupportedExtensions()
• webglreport.com