<!DOCTYPE html><!-- webkit-test-runner [ useFlexibleViewport=true ] -->
<html>
<head>
<title>This tests the case when visible content change happens through transition and there's a pending style update.</title>
<script src="../../../../../resources/ui-helper.js"></script>
<style>

#tapThis {
    width: 400px;
    height: 400px;
    border: 1px solid green;
    -webkit-user-modify: read-write;
}

#becomesVisible {
    visibility: hidden;
    opacity: 0.8;
    width: 100px;
    height: 100px;
    background-color: green;
    transition: opacity 1ms;
}
</style>
<script>
async function test() {
    if (!window.testRunner || !testRunner.runUIScript)
        return;
    if (window.internals)
        internals.settings.setContentChangeObserverEnabled(true);

    testRunner.waitUntilDone();
    testRunner.dumpAsText();

    await UIHelper.activateElement(tapThis);
}
</script>
</head>
<body onload="test()">
<div id=tapThis>PASS if no crash or assert.</div>
<div id=becomesVisible></div>
<script>
tapThis.addEventListener("touchstart", function( event ) {
    becomesVisible.style.visibility = "visible";
    becomesVisible.style.opacity = "1";
}, false);

tapThis.addEventListener("click", function( event ) {
    if (window.testRunner)
        testRunner.notifyDone();
}, false);
</script>
</body>
</html>