<!DOCTYPEhtml>
<html>
<meta name="viewport" content="width=device-width; initial-scale=1.0">
<title>Test that touch scrolling keeps working with a smooth scroll operation by JS</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script src="apz_test_utils.js"></script>
<script src="apz_test_native_event_utils.js"></script>
<style> body {
margin: 0px;
padding: 0px;
}
</style>
<divstyle="width: 100vw; height: 300vh;"></div>
<script>
async function test() {
let scrollYInEventHandler;
window.addEventListener("scroll", () => {
scrollYInEventHandler = window.scrollY;
// Trigger a smooth scroll.
window.scrollTo({top: 0, behavior: "smooth"});
}, { once: true });
// Send touch events to scroll down the content.
// Note that each touch event needs to be sent in each frame to
// give a chance to receive a scroll event while sending the evets.
for (let y = 200; y > 0; y -= 10) {
await synthesizeNativeTouch(window, 100, y, SpecialPowers.DOMWindowUtils.TOUCH_CONTACT);
await promiseFrame();
}
ok(scrollYInEventHandler * 2 <= window.scrollY,
`The last scroll position ${window.scrollY} should be greater than the
double of the position in scroll event handler ${scrollYInEventHandler}`);
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.
