offscreencanvas-worker-font-load-crash.html

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas-worker-font-load-crash.html - WPT Dashboard Interop Dashboard

<!doctype html>

<html class="test-wait reftest-wait">

<script>

  let url = URL.createObjectURL(new Blob([`

    let font = new FontFace('Ahem', 'url(/fonts/Ahem.ttf)');

    self.fonts.add(font);

    let canvas = new OffscreenCanvas(100, 100);

    let ctx = canvas.getContext('2d');

    ctx.font = "10px Ahem";

    ctx.fillText('Hello', 0, 10);

    postMessage('done');

  `], { type: "application/javascript" }));

  var worker = new Worker(url);

  worker.onmessage = function() {

    worker.terminate();

    URL.revokeObjectURL(url);

    document.documentElement.className = "";

};

</script>