tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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effect-on-marquee-parent-crash.html (637B)

      1 <!DOCTYPE html>
      2 <title>Animating marquee's parent inside display:none</title>
      3 <link rel="help" href="https://drafts.csswg.org/web-animations-1/">
      4 <link rel="help" href="https://crbug.com/1290016">
      5 <div id=container></div>
      6 <script>
      7  let outer = document.createElement('div');
      8  outer.style.display = 'none';
      9  let inner = document.createElement('div');
     10  let marquee = document.createElement('marquee');
     11 
     12  let effect = new KeyframeEffect(inner, [{'width': '1px'}], 1);
     13  let anim = new Animation(effect, null);
     14  anim.pause();
     15 
     16  document.body.append(outer);
     17  outer.append(inner);
     18  inner.append(marquee);
     19 
     20  // Don't crash.
     21 </script>