toDataURL-alpha.html | Explore in Territory

<!DOCTYPE html> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<title>canvas toDataURL alpha png bug</title> 
<script type="text/javascript"> 
  function load() {
      var context = document.getElementById("c").getContext("2d");
      context.fillStyle = "rgba(200, 255, 200, 0.7)";
      context.fillRect(0, 0, context.canvas.width, context.canvas.height);
      document.getElementById("d").style.backgroundImage = ["url(", context.canvas.toDataURL("image/png"), ")"].join("");
  }
</script> 
</head> 
<body onload="load()"> 
    <p>The test passes if both boxes below have the same color.</p>
    <canvas id="c" width="200" height="100"></canvas>
    <div id="d" style="width:200px;height:100px"></div>
</body> 
</html>

chromium/third_party/blink/web_tests/fast/canvas/toDataURL-alpha.html