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Issue 2556243003:
IntersectionObserver: compute correct intersection ratio for 0x0 elements (Closed)
| Index: third_party/WebKit/LayoutTests/intersection-observer/zero-area-element-hidden.html |
| diff --git a/third_party/WebKit/LayoutTests/intersection-observer/zero-area-element-hidden.html b/third_party/WebKit/LayoutTests/intersection-observer/zero-area-element-hidden.html |
| new file mode 100644 |
| index 0000000000000000000000000000000000000000..26c8ccd3398cac7be21c4c8fef76cc3ad6ce0f54 |
| --- /dev/null |
| +++ b/third_party/WebKit/LayoutTests/intersection-observer/zero-area-element-hidden.html |
| @@ -0,0 +1,24 @@ |
| +<!DOCTYPE html> |
| +<script src="../resources/js-test.js"></script> |
|
foolip
2016/12/08 16:28:59
It looks like this test doesn't depend on any inte
Sami
2016/12/09 17:24:36
I'll give it a shot. This was just a carbon copy o
|
| +<script src="../resources/intersection-observer-helper-functions.js"></script> |
| +<div id='target' style='width:0px; height:0px; position: fixed; top: -1000px'</div>" |
| +<script> |
| +description("Ensure that a hidden zero-area element is treated correctly."); |
|
foolip
2016/12/08 16:28:59
With testharness.js this can go in <title>, if the
|
| + |
| +var entries = []; |
| +var target; |
| + |
| +onload = function() { |
|
foolip
2016/12/08 16:28:59
Does the test need to wait for the window load eve
Sami
2016/12/09 17:24:36
You're right -- there's no need to wait for anythi
|
| + target = document.getElementById("target"); |
| + new IntersectionObserver((changes) => { |
| + entries.push(...changes); |
| + }).observe(target); |
| + waitForNotification(step0); |
|
foolip
2016/12/08 16:28:59
With testharness.js, this would be:
waitForNotific
Sami
2016/12/09 17:24:36
Done.
|
| +}; |
| + |
| +function step0() { |
| + // Since the element is initially assumed to be hidden, there are no entries. |
| + shouldBeEqualToNumber("entries.length", 0); |
| + finishJSTest(); |
| +} |
| +</script> |
