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Test Info:

<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML Canvas Test: the 'direction' property</title>
<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
<link rel="match" href="reference/direction-rtl-ref.html">
<meta name="assert" content="text rendering respects the direction property">
<style>
canvas {
margin: 10px;
border: 1px solid gray;
}
</style>
<canvas id="c" width="300" height="300"></canvas>
<script>
let ctx = c.getContext("2d");
ctx.direction = "rtl";
ctx.font = "16px sans-serif";
ctx.textAlign = "left";
ctx.fillText("Hello World!", 150, 50);
ctx.textAlign = "right";
ctx.fillText("Hello World!", 150, 100);
ctx.textAlign = "start";
ctx.fillText("Hello World!", 150, 150);
ctx.textAlign = "end";
ctx.fillText("Hello World!", 150, 200);
ctx.textAlign = "center";
ctx.fillText("Hello World!", 150, 250);
</script>