40 lines
1.0 KiB
HTML
40 lines
1.0 KiB
HTML
<!DOCTYPE html>
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<script src="../resources/testharness.js"></script>
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<script src="../resources/testharnessreport.js"></script>
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<script>
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if (window.internals) {
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// Disable timers that trigger delayed flushes, since these will make
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// this test pass spuriously, even if IntersectionObserver never
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// schedules any rendering updates.
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internals.setSpeculativeTilingDelayDisabledForTesting(true);
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internals.disableTileSizeUpdateDelay();
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}
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window.onload = function() {
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async_test((t) => {
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var observer = new IntersectionObserver(t.step_func_done(() => {
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observer.disconnect();
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}));
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requestAnimationFrame(() => {
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requestAnimationFrame(() => {
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setTimeout(() => {
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observer.observe(document.getElementById("target"));
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}, 0);
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});
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});
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}, "An initial observation is fired even when nothing else triggers rendering");
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};
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</script>
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<style>
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#target {
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width: 100px;
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height: 100px;
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background-color: green;
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}
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</style>
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<div id="target"></div>
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