unclosed-nested-layers.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/manual/layers/unclosed-nested-layers.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html class="reftest-wait">

<link rel="match" href="unclosed-nested-layers-expected.html">

<title>Canvas test: unclosed-nested-layers</title>

<h1>unclosed-nested-layers</h1>

<p class="desc">Check that unclosed nested layers aren't rendered.</p>

<canvas id="canvas" width="1" height="1">

  <p class="fallback">FAIL (fallback content)</p>

</canvas>

<script>

  var placeholder = document.getElementById('canvas');

  var offscreen = placeholder.transferControlToOffscreen();

  const ctx = offscreen.getContext('2d');

  offscreen.width = offscreen.height = 200;

  ctx.fillStyle = 'rgba(0, 0, 255, 1)';

  ctx.fillRect(60, 60, 75, 50);

  ctx.beginLayer();

  ctx.fillStyle = 'rgba(225, 0, 0, 1)';

  ctx.fillRect(50, 50, 75, 50);

  ctx.beginLayer();

  ctx.fillStyle = 'rgba(0, 255, 0, 1)';

  ctx.fillRect(70, 70, 75, 50);

  ctx.endLayer();

  // Missing ctx.endLayer() here.

  function draw () {

    // Wait until frame propagates.

    if(placeholder.width != 200) {

      requestAnimationFrame(draw);

    } else {

      document.documentElement.classList.remove("reftest-wait");

  requestAnimationFrame(draw);

</script>