tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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scroll-button-display-none.html (1263B)

      1 <!DOCTYPE html>
      2 <meta charset="utf-8">
      3 <title>CSS Overflow Test: focused ::scroll-button() does not crash after becoming display none</title>
      4 <link rel="help" href="http://crbug.com/402673873">
      5 <script src="/resources/testharness.js"></script>
      6 <script src="/resources/testharnessreport.js"></script>
      7 <script src="/resources/testdriver.js"></script>
      8 <script src="/resources/testdriver-actions.js"></script>
      9 <script src="/resources/testdriver-vendor.js"></script>
     10 <style>
     11  #scroller::scroll-button(left) {
     12    content: "";
     13    background-color: red;
     14    height: 100px;
     15    width: 100px;
     16    top: 0;
     17    left: 0;
     18    position: absolute;
     19  }
     20 
     21  #scroller.hide::scroll-button(left) {
     22    display: none;
     23  }
     24 
     25  #scroller {
     26    width: 300px;
     27    height: 300px;
     28    overflow: auto;
     29  }
     30 
     31  #filler {
     32    height: 20000x;
     33  }
     34 </style>
     35 <div id="scroller">
     36  <div id="filler"></div>
     37 </div>
     38 <script>
     39  promise_test(async t => {
     40    await new test_driver.Actions()
     41      .pointerMove(15, 15)
     42      .pointerDown()
     43      .pointerUp()
     44      .send();
     45    scroller.className = "hide";
     46    document.documentElement.offsetTop;
     47    await new test_driver.Actions()
     48      .pointerMove(15, 15)
     49      .pointerDown()
     50      .pointerUp()
     51      .send();
     52    assert_true(true);
     53  });
     54 </script>