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<!DOCTYPE html>
<meta charset="utf-8">
<title>HTML OffscreenCanvas reference</title>
<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
<canvas id="c1"></canvas>
<br>
<canvas id="c2"></canvas>
<script>
for (let c = 1; c <= 2; ++c) {
let ctx = document.getElementById("c" + c).getContext("2d");
ctx.font = "32px serif";
ctx.fillText("Hello World", 20, 100);
}
</script>