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<!DOCTYPE html>
<meta charset="utf-8">
<title>Reference for backdrop-filter with invalid mask-image URL</title>
<style>
body {
background-color: yellow;
}
/* Reference for backdrop-filter only - should show inverted background */
.backdrop-filter {
backdrop-filter: invert(1);
background-color: rgba(255, 255, 255, 0.5);
}
</style>
<p class="backdrop-filter double-mask">Backdrop-filter with double mask-image</p>