tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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browser_bug585785.js (1147B)

      1 var tab;
      2 
      3 function test() {
      4  waitForExplicitFinish();
      5 
      6  // Force-enable tab animations
      7  gReduceMotionOverride = false;
      8 
      9  tab = BrowserTestUtils.addTab(gBrowser);
     10  isnot(
     11    tab.getAttribute("fadein"),
     12    "true",
     13    "newly opened tab is yet to fade in"
     14  );
     15 
     16  // Try to remove the tab right before the opening animation's first frame
     17  window.requestAnimationFrame(checkAnimationState);
     18 }
     19 
     20 function checkAnimationState() {
     21  is(tab.getAttribute("fadein"), "true", "tab opening animation initiated");
     22 
     23  info(window.getComputedStyle(tab).maxWidth);
     24  gBrowser.removeTab(tab, { animate: true });
     25  if (!tab.parentNode) {
     26    ok(
     27      true,
     28      "tab removed synchronously since the opening animation hasn't moved yet"
     29    );
     30    finish();
     31    return;
     32  }
     33 
     34  info(
     35    "tab didn't close immediately, so the tab opening animation must have started moving"
     36  );
     37  info("waiting for the tab to close asynchronously");
     38  tab.addEventListener(
     39    "TabAnimationEnd",
     40    function listener() {
     41      executeSoon(function () {
     42        ok(!tab.parentNode, "tab removed asynchronously");
     43        finish();
     44      });
     45    },
     46    { once: true }
     47  );
     48 }