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<!doctype html>
<meta charset="utf-8">
<title>Bug 1481500: mouse enter / leave events in slotted content</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css">
<script>
// We move the mouse from the #host to #target, then to #child-target.
//
// By the time we get to #child-target, we shouldn't have fired any mouseleave.
function runTests() {
let iframe = document.createElement('iframe');
iframe.style.width = "600px";
iframe.style.height = "600px";
document.body.appendChild(iframe);
iframe.onload = () => frameLoaded(iframe);
iframe.srcdoc = `
<style>
#child-target {
width: 80px;
height: 80px;
background: yellow;
}
</style>
<div id="host"><div id="target"><div id="child-target"></div></div></div>
`;
}
function frameLoaded(iframe) {
let host = iframe.contentDocument.getElementById('host');
let target = iframe.contentDocument.getElementById('target');
let childTarget = iframe.contentDocument.getElementById('child-target');
let sawHost = false;
let sawTarget = false;
let finished = false;
host.attachShadow({ mode: 'open' }).innerHTML = `
<style>
:host {
width: 500px;
height: 500px;
background: purple;
}
::slotted(div) {
width: 200px;
height: 200px;
background: green;
}
</style>
<slot></slot>
`;
host.addEventListener("mouseenter", e => {
if (finished)
return;
sawHost = true;
ok(true, "Should fire mouseenter on the host.");
});
host.addEventListener("mouseleave", e => {
if (finished)
return;
ok(false, "Should not fire mouseleave when moving the cursor to the slotted target");
});
target.addEventListener("mouseenter", () => {
if (finished)
return;
ok(sawHost, "Should've seen the hostmouseenter already");
sawTarget = true;
ok(true, "Moving the mouse into the target should trigger a mouseenter there");
});
target.addEventListener("mouseleave", () => {
if (finished)
return;
ok(false, "Should not fire mouseleave when moving the cursor to the slotted target's child");
});
childTarget.addEventListener("mouseenter", () => {
if (finished)
return;
ok(sawTarget, "Should've seen the target mouseenter already");
finished = true;
SimpleTest.finish();
});
synthesizeMouseAtCenter(host, { type: "mousemove" });
synthesizeMouseAtCenter(target, { type: "mousemove" });
synthesizeMouseAtCenter(childTarget, { type: "mousemove" });
}
SimpleTest.waitForExplicitFinish();
window.onload = () => {
SimpleTest.waitForFocus(runTests);
};
</script>
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