зеркало из https://github.com/mozilla/gecko-dev.git
68 строки
1.3 KiB
HTML
68 строки
1.3 KiB
HTML
<!DOCTYPE html>
|
|
<html lang="en" class="reftest-wait">
|
|
<meta charset="utf-8">
|
|
<title>Starting to scroll the nested scrollbox shouldn't invalidate the fixed layer</title>
|
|
|
|
<style>
|
|
|
|
.content {
|
|
box-sizing: border-box;
|
|
width: 200px;
|
|
height: 200px;
|
|
border: 1px solid black;
|
|
}
|
|
|
|
.fixed {
|
|
position: fixed;
|
|
top: 20px;
|
|
left: 240px;
|
|
}
|
|
|
|
.reftest-no-paint {
|
|
border-color: lime;
|
|
}
|
|
|
|
.scrollable {
|
|
overflow: auto;
|
|
padding: 10px;
|
|
}
|
|
|
|
.scrolled {
|
|
border: 1px solid gray;
|
|
height: 400px;
|
|
}
|
|
|
|
body {
|
|
margin: 0;
|
|
padding: 20px;
|
|
height: 3000px;
|
|
}
|
|
|
|
</style>
|
|
|
|
<div class="scrollable content" id="aboutToScroll">
|
|
<!--
|
|
This scrollbox starts out without active scrolling and is going to become
|
|
actively scrolled.
|
|
-->
|
|
<div class="scrolled"></div>
|
|
</div>
|
|
|
|
<div class="fixed reftest-no-paint content">
|
|
<!--
|
|
This fixed layer gets its own PaintedLayer above the rest.
|
|
When the contents of .scrollable require their own PaintedLayer, that
|
|
should not cause .fixed to change layers.
|
|
-->
|
|
</div>
|
|
|
|
<script>
|
|
|
|
function doTest() {
|
|
document.querySelector("#aboutToScroll").scrollTop = 50 - document.querySelector("#aboutToScroll").scrollTop;
|
|
document.documentElement.removeAttribute("class");
|
|
}
|
|
document.addEventListener("MozReftestInvalidate", doTest);
|
|
|
|
</script>
|