Content - 48c9aa4d535fa0b65c04cf2622e471cbade224b4 - bb5ccf5/intersection-observer/empty-root-margin.html

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Tip revision: 6881c71edb4a38f1299ae978db951ba0971e3461 authored by Xianzhu Wang on 20 December 2018, 18:18:36 UTC
[CI] Use LayoutBox::ShouldClipOverflow() for LayoutReplaced

Tip revision: 6881c71

empty-root-margin.html

<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<style>
#target {
  width: 100px;
  height: 100px;
  background-color: green;
}
</style>

<div id="target"></div>

<script>
var target = document.getElementById("target");
async_test((t) => {
    var observer = new IntersectionObserver(t.step_func_done((entries) => {
        var rootBounds = entries[0].rootBounds;
        assert_equals(rootBounds.left, 0);
        assert_equals(rootBounds.right, document.documentElement.clientWidth);
        assert_equals(rootBounds.top, 0);
        assert_equals(rootBounds.bottom, document.documentElement.clientHeight);
        observer.disconnect();
    }), { rootMargin: "" });
    observer.observe(document.getElementById("target"));
}, "An empty rootMargin string is interpreted as a margin of size zero");
</script>

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