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f55533615b
Instead of hard-cording the root scroll frame id, get the value from WebRender. This was previously hard-coded to 0, so when WebRender switched to using 1 for the root scroll frame id, the positioning of sticky frames were broken in subtle ways. This happened because they were being parented to a root reference frame (which now uses the 0 id) instead of the root scroll frame. MozReview-Commit-ID: 66ArgKHGpWE --HG-- extra : rebase_source : ff6937bf7fc8d4472eb074d0466c8dcd6fba54a8
37 lines
600 B
HTML
37 lines
600 B
HTML
<!DOCTYPE html>
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<html>
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<head>
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<style>
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#container {
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float: left;
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position: sticky;
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top: 0;
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margin-top: -20px;
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z-index: 100;
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}
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#target {
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margin-top: 80px;
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width: 20px;
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height: 20px;
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background: green;
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}
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#necessary-fixed-box {
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position: fixed;
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top: 0;
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width: 20px;
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height: 20px;
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}
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</style>
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</head>
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<body style="height: 10000px;">
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<div id="container">
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<div id="target"></div>
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<div id="necessary-fixed-box"></div>
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</div>
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</body>
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</html>
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