<!DOCTYPE HTML>
<html class="reftest-wait">
<head>
<meta charset="utf-8">
<title>Testcase for bug 1010538 - Dynamically change scroll-behavior</title>
<style type="text/css">
html,body {
color: black;
background-color: white;
font-size: 16px;
padding: 0;
margin: 0;
}
.a_box {
position: relative;
left: 0px;
top: 0px;
width: 20px;
height: 20px;
background: blue;
}
.another_box {
position: relative;
left: 2000px;
top: 2000px;
width: 20px;
height: 20px;
background: green;
}
.scroll_box {
width: 150px;
height: 150px;
overflow: scroll;
}
#scroll_2 {
scroll-behavior: auto;
}
#scroll_3 {
scroll-behavior: smooth;
}
</style>
</head>
<body>
<div id="scroll_1" class="scroll_box">
<div id="box1a" class="a_box"></div>
<div id="box1b" class="another_box"></div>
</div>
<div id="scroll_2" class="scroll_box">
<div id="box2a" class="a_box"></div>
<div id="box2b" class="another_box"></div>
</div>
<div id="scroll_3" class="scroll_box">
<div id="box3a" class="a_box"></div>
<div id="box3b" class="another_box"></div>
</div>
<script>
function doTest() {
if (document.location.search != '?ref') {
// Expect smooth scroll:
document.getElementById("scroll_1").style.scrollBehavior = "smooth";
document.getElementById("scroll_1").scrollTo({left: 0, top: 0});
document.getElementById("scroll_2").style.scrollBehavior = "smooth";
document.getElementById("scroll_2").scrollTo({left: 0, top: 0});
// Expect instant scroll:
document.getElementById("scroll_3").style.scrollBehavior = "auto";
document.getElementById("scroll_3").scrollTo({left: 0, top: 0});
} else {
document.getElementById("scroll_1").scrollTo({left: 0, top: 0, behavior: "smooth"});
document.getElementById("scroll_2").scrollTo({left: 0, top: 0, behavior: "smooth"});
document.getElementById("scroll_3").scrollTo({left: 0, top: 0, behavior: "instant"});
}
// Interrupt any smooth scrolling
for (var i=1; i <= 3; i++) {
document.getElementById("scroll_" + i).scrollTo();
}
document.documentElement.removeAttribute("class");
}
for (var i=1; i <= 3; i++) {
document.getElementById("box" + i + "b")
.scrollIntoView({block: "start", behavior: "instant"});
}
window.addEventListener("MozReftestInvalidate", doTest);
</script>
</body>
</html>