chromium/src/third_party/blink/web_tests/fast/canvas/no-alpha.html - manifest_repos/chromium_src - Git at Google

 <!DOCTYPE html>
 <canvas id="c"></canvas>
 <script type="text/javascript">
 /*
   A test to make sure drawing a canvas with alpha = false works appropriately.
 */
 const color = "rgba(120, 45, 200, 0.7)"; // A kind of half purple
 const canvas = document.getElementById("c");
 const ctx = canvas.getContext("2d", { alpha: false });
 ctx.fillStyle = color;
 ctx.fillRect(10, 10, 100, 100);
 </script>
 </html>
	<!DOCTYPE html>
	<canvas id="c"></canvas>
	<script type="text/javascript">
	/*
	A test to make sure drawing a canvas with alpha = false works appropriately.
	*/
	const color = "rgba(120, 45, 200, 0.7)"; // A kind of half purple
	const canvas = document.getElementById("c");
	const ctx = canvas.getContext("2d", { alpha: false });
	ctx.fillStyle = color;
	ctx.fillRect(10, 10, 100, 100);
	</script>
	</html>