intersection-observer) Import web-platform tests. Upstreamed from https://bugzilla.mozilla.org/show_bug.cgi?id=1358666 [ci skip]
diff --git a/intersection-observer/zero-area-element-visible.html b/intersection-observer/zero-area-element-visible.html new file mode 100644 index 0000000..6bf1297 --- /dev/null +++ b/intersection-observer/zero-area-element-visible.html
@@ -0,0 +1,39 @@ +<!DOCTYPE html> +<script src="/resources/testharness.js"></script> +<script src="/resources/testharnessreport.js"></script> +<script src="./resources/intersection-observer-test-utils.js"></script> + +<style> +pre, #log { + position: absolute; + top: 0; + left: 200px; +} +#target { + width: 0px; + height: 0px; +} +</style> + +<div id='target'></div> + +<script> +var entries = []; + +runTestCycle(function() { + var target = document.getElementById('target'); + assert_true(!!target, "target exists"); + var observer = new IntersectionObserver(function(changes) { + entries = entries.concat(changes) + }); + observer.observe(target); + entries = entries.concat(observer.takeRecords()); + assert_equals(entries.length, 0, "No initial notifications."); + runTestCycle(step0, "First rAF should generate a notification."); +}, "Ensure that a zero-area target intersecting root generates a notification with intersectionRatio == 1"); + +function step0() { + assert_equals(entries.length, 1, "One notification."); + assert_equals(entries[0].intersectionRatio, 1, "intersectionRatio == 1"); +} +</script> 