The read-only WebGLContextEvent.statusMessage property contains additional event status information, or is an empty string if no additional information is available.

The statusMessage property can contain a platform dependent string with details of an event. This can occur, for example, if the webglcontextcreationerror event is fired.

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

canvas.addEventListener(
  "webglcontextcreationerror",
  (e) => {
    console.log(
      `WebGL context creation failed: ${e.statusMessage || "Unknown error"}`,
    );
  },
  false,
);

• webglcontextcreationerror