79 lines
2.9 KiB
HTML
79 lines
2.9 KiB
HTML
<!DOCTYPE HTML>
|
|
<meta charset=utf-8>
|
|
<title>Element Timing: invisible images are not observable</title>
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<style>
|
|
#opacity0 {
|
|
opacity: 0;
|
|
}
|
|
#visibilityHidden {
|
|
visibility: hidden;
|
|
}
|
|
#displayNone {
|
|
display: none;
|
|
}
|
|
</style>
|
|
<script>
|
|
async_test(function (t) {
|
|
assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented");
|
|
const observer = new PerformanceObserver(
|
|
t.step_func_done((entries) => {
|
|
// The image should not have caused an entry, so fail test.
|
|
assert_unreached('Should not have received an entry! Received one with identifier '
|
|
+ entries.getEntries()[0].identifier);
|
|
})
|
|
);
|
|
observer.observe({entryTypes: ['element']});
|
|
// We add the images during onload to be sure that the observer is registered
|
|
// in time for it to observe the element timing.
|
|
window.onload = () => {
|
|
const img = document.createElement('img');
|
|
img.src = 'resources/square100.png';
|
|
img.setAttribute('elementtiming', 'my_image');
|
|
img.setAttribute('id', 'opacity0');
|
|
document.body.appendChild(img);
|
|
|
|
const img2 = document.createElement('img');
|
|
img2.src = 'resources/square20.png';
|
|
img2.setAttribute('elementtiming', 'my_image2');
|
|
img2.setAttribute('id', 'visibilityHidden');
|
|
document.body.appendChild(img2);
|
|
|
|
const img3 = document.createElement('img');
|
|
img3.src = 'resources/circle.svg';
|
|
img3.setAttribute('elementtiming', 'my_image3');
|
|
img3.setAttribute('id', 'displayNone');
|
|
document.body.appendChild(img3);
|
|
|
|
const div = document.createElement('div');
|
|
div.setAttribute('id', 'opacity0');
|
|
const img4 = document.createElement('img');
|
|
img4.src = '/images/blue.png';
|
|
img4.setAttribute('elementtiming', 'my_image4');
|
|
div.appendChild(img4);
|
|
document.body.appendChild(div);
|
|
|
|
const div2 = document.createElement('div');
|
|
div2.setAttribute('id', 'visibilityHidden');
|
|
const img5 = document.createElement('img');
|
|
img5.src = '/images/blue.png';
|
|
img5.setAttribute('elementtiming', 'my_image5');
|
|
div.appendChild(img5);
|
|
document.body.appendChild(div2);
|
|
|
|
const div3 = document.createElement('div');
|
|
div3.setAttribute('id', 'displayNone');
|
|
const img6 = document.createElement('img');
|
|
img6.src = '/images/blue.png';
|
|
img6.setAttribute('elementtiming', 'my_image6');
|
|
div.appendChild(img6);
|
|
document.body.appendChild(div3);
|
|
// Images have been added but should not cause entries to be dispatched.
|
|
// Wait for 500ms and end test, ensuring no entry was created.
|
|
t.step_timeout(() => {
|
|
t.done();
|
|
}, 500);
|
|
};
|
|
}, 'Images with opacity: 0, visibility: hidden, or display: none are not observable.');
|
|
</script>
|