Note: This feature is available in Web Workers.
The WebGLRenderingContext.getAttachedShaders() method of the WebGL API returns a list of WebGLShader objects attached to a WebGLProgram.
getAttachedShaders(program)programA WebGLProgram object to get attached shaders for.
An Array of WebGLShader objects that are attached to the given WebGLProgram.
const program = gl.createProgram();
// Attach pre-existing shaders
gl.attachShader(program, vertexShader);
gl.attachShader(program, fragmentShader);
gl.linkProgram(program);
gl.getAttachedShaders(program);