src/webgpu/web_platform/reftests/ref/canvas_clear-ref.html

<!DOCTYPE html>
<html>
  <title>WebGPU canvas_clear (ref)</title>
  <meta charset="utf-8" />
  <link rel="help" href="https://gpuweb.github.io/gpuweb/" />
  <canvas id="cvs0" width="20" height="20" style="width: 20px; height: 20px;"></canvas>
  <canvas id="cvs1" width="20" height="20" style="width: 20px; height: 20px;"></canvas>
  <canvas id="cvs2" width="20" height="20" style="width: 20px; height: 20px;"></canvas>
  <script>
    function draw(canvas) {
      var c = document.getElementById(canvas);
      var ctx = c.getContext('2d');
      ctx.fillStyle = '#66FF00';
      ctx.fillRect(0, 0, c.width, c.height);
    }

    draw('cvs0');
    draw('cvs1');
    draw('cvs2');

 </script>
</html>