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<!DOCTYPE html>
<meta charset=utf-8>
<title>cssom-view - scrollingElement</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
function makeDescription(rootDisplay, bodyDisplay) {
let a = [];
if (rootDisplay) {
a.push(`root ${rootDisplay}`);
}
if (bodyDisplay) {
a.push(`body ${bodyDisplay}`);
}
let s = a.join(", ");
if (s) {
s = ` (${s})`;
}
return s;
}
function quirksTest(rootDisplay, bodyDisplay) {
async_test(function() {
let quirksFrame = document.createElement("iframe");
quirksFrame.onload = this.step_func_done(function() {
var quirksDoc = quirksFrame.contentDocument;
assert_equals(quirksDoc.compatMode, "BackCompat", "Should be in quirks mode.");
assert_not_equals(quirksDoc.body, null, "Should have a body element");
quirksDoc.documentElement.style.display = rootDisplay;
quirksDoc.body.style.display = bodyDisplay;
// Tests for quirks mode document.
assert_equals(quirksDoc.scrollingElement, quirksDoc.body,
"scrollingElement in quirks mode should default to body element.");
quirksDoc.documentElement.style.overflow = "clip";
quirksDoc.body.style.overflow = "auto";
assert_equals(quirksDoc.scrollingElement, null);
quirksDoc.body.style.overflow = "hidden";
assert_equals(quirksDoc.scrollingElement, null);
quirksDoc.body.style.overflow = "scroll";
assert_equals(quirksDoc.scrollingElement, null);
quirksDoc.body.style.overflow = "visible";
assert_equals(quirksDoc.scrollingElement, quirksDoc.body);
quirksDoc.body.style.overflow = "clip";
assert_equals(quirksDoc.scrollingElement, quirksDoc.body);
quirksDoc.documentElement.style.overflow = "scroll";
quirksDoc.body.style.overflow = "scroll";
assert_equals(quirksDoc.scrollingElement, null,
"scrollingElement in quirks mode should be null if overflow of body and root element isn't visible.");
quirksDoc.documentElement.style.overflow = "visible";
assert_equals(quirksDoc.scrollingElement, quirksDoc.body);
quirksDoc.documentElement.style.overflow = "scroll";
quirksDoc.body.style.overflow = "visible";
assert_equals(quirksDoc.scrollingElement, quirksDoc.body);
quirksDoc.documentElement.style.overflow = "visible";
assert_equals(quirksDoc.scrollingElement, quirksDoc.body);
quirksDoc.body.style.display = "none";
assert_equals(quirksDoc.scrollingElement, quirksDoc.body)
quirksDoc.body.style.display = "block";
assert_equals(quirksDoc.scrollingElement, quirksDoc.body);
quirksDoc.documentElement.appendChild(quirksDoc.createElement("body"));
assert_equals(quirksDoc.scrollingElement, quirksDoc.body);
assert_equals(quirksDoc.scrollingElement, quirksDoc.getElementsByTagName("body")[0]);
quirksDoc.documentElement.removeChild(quirksDoc.documentElement.lastChild);
assert_equals(quirksDoc.scrollingElement, quirksDoc.body);
quirksDoc.documentElement.removeChild(quirksDoc.body);
assert_equals(quirksDoc.scrollingElement, null);
quirksDoc.documentElement.appendChild(quirksDoc.createElementNS("foobarNS", "body"));
assert_equals(quirksDoc.scrollingElement, null);
quirksDoc.removeChild(quirksDoc.documentElement);
assert_equals(quirksDoc.scrollingElement, null);
quirksDoc.appendChild(quirksDoc.createElementNS("foobarNS", "html"));
quirksDoc.documentElement.appendChild(quirksDoc.createElement("body"));
assert_equals(quirksDoc.scrollingElement, null);
quirksDoc.removeChild(quirksDoc.documentElement);
quirksDoc.appendChild(quirksDoc.createElement("body"));
assert_equals(quirksDoc.scrollingElement, null);
quirksFrame.remove();
});
quirksFrame.src =
URL.createObjectURL(new Blob([], { type: "text/html" }));
document.body.append(quirksFrame);
}, `scrollingElement in quirks mode${makeDescription(rootDisplay, bodyDisplay)}`);
}
function nonQuirksTest(rootDisplay, bodyDisplay) {
async_test(function() {
let nonQuirksFrame = document.createElement("iframe");
nonQuirksFrame.onload = this.step_func_done(function() {
var nonQuirksDoc = nonQuirksFrame.contentDocument;
assert_equals(nonQuirksDoc.compatMode, "CSS1Compat", "Should be in standards mode.");
assert_not_equals(nonQuirksDoc.body, null, "Should have a body element");
nonQuirksDoc.documentElement.style.display = rootDisplay;
nonQuirksDoc.body.style.display = bodyDisplay;
assert_equals(nonQuirksDoc.scrollingElement, nonQuirksDoc.documentElement,
"scrollingElement in standards mode should be the document element.");
for (let rootOverflow of ["", "clip", "scroll", "hidden", "visible"]) {
for (let bodyOverflow of ["", "clip", "scroll", "hidden", "visible"]) {
nonQuirksDoc.documentElement.style.overflow = rootOverflow;
nonQuirksDoc.body.style.overflow = bodyOverflow;
assert_equals(nonQuirksDoc.scrollingElement, nonQuirksDoc.documentElement);
}
}
nonQuirksDoc.removeChild(nonQuirksDoc.documentElement);
assert_equals(nonQuirksDoc.scrollingElement, null);
nonQuirksDoc.appendChild(nonQuirksDoc.createElement("foobar"));
assert_equals(nonQuirksDoc.scrollingElement.localName, "foobar");
nonQuirksFrame.remove();
});
nonQuirksFrame.src =
URL.createObjectURL(new Blob([`<!doctype html>`], { type: "text/html" }));
document.body.append(nonQuirksFrame);
}, `scrollingElement in no-quirks mode ${makeDescription(rootDisplay, bodyDisplay)}`);
}
for (let rootDisplay of ["", "table"]) {
for (let bodyDisplay of ["", "table"]) {
quirksTest(rootDisplay, bodyDisplay);
nonQuirksTest(rootDisplay, bodyDisplay);
}
}
</script>
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