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<!DOCTYPE html>
<meta charset="utf-8" >
<meta name="author" title="Di Zhang" href="mailto:dizhangg@chromium.org">
<meta name="assert" content="Modify slot fallback contents, when dynamically created.">
<title>Shadow DOM: Slots and fallback contents</title>
<link rel="match" href="slot-fallback-content-003-ref.html">
<p>Test passes if there are two lines of text "SLOT1", "A" below.</p>
<div id="host1"><slot id="slot1">SLOT1</slot></div>
<p>Test passes if there is one line of text "C" below.</p>
<div id="host2"><slot id="slot2">
<div id="B">FAIL</div>
<div id="C">C</div>
</slot></div>
<p>Test passes if empty.</p>
<div id="host3">
<slot id="slot3">
<div id="D">FAIL</div>
</slot>
</div>
<script>
// Content added to existing fallback content will be rendered
const shadowRoot1 = host1.attachShadow({ mode: "open" });
shadowRoot1.appendChild(slot1);
const A = document.createElement('div');
A.innerText = 'A';
shadowRoot1.getElementById('slot1').appendChild(A);
// Remove some content from existing slot fallback will render the leftover fallback
const shadowRoot2 = host2.attachShadow({ mode: "open" });
shadowRoot2.appendChild(slot2);
const B = shadowRoot2.getElementById('B');
B.remove();
// // Remove all content from existing slot fallback will render no fallback
const shadowRoot3 = host3.attachShadow({ mode: "open" });
shadowRoot3.appendChild(slot3);
const D = shadowRoot3.getElementById('D');
D.remove();
</script>
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