参考:https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/webglcontextlost_event
const canvas = document.getElementById('canvas');
const gl = canvas.getContext('webgl');
canvas
参考:https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/webglcontextlost_event
const canvas = document.getElementById('canvas');
const gl = canvas.getContext('webgl');
canvas