| <body style="margin:0"> |
| <canvas style="display:block;" id="canvas"></canvas> |
| <script> |
| if (window.testRunner) |
| testRunner.waitUntilDone(); |
| canvas.addEventListener('webglcontextlost', e => { |
| e.preventDefault(); |
| setTimeout((e) => { |
| ext.restoreContext(); |
| }, 100); |
| }); |
| canvas.addEventListener('webglcontextrestored', e => { |
| gl.clearColor(0, 1, 0, 1); |
| gl.clear(gl.COLOR_BUFFER_BIT); |
| if (window.testRunner) |
| testRunner.notifyDone(); |
| }); |
| let gl = canvas.getContext("webgl"); |
| let ext = gl.getExtension("WEBGL_lose_context"); |
| window.requestAnimationFrame(() => { |
| ext.loseContext(); |
| }); |
| </script> |
| </body> |
