File: template-patchfor-innerHTML-outside.html

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<!DOCTYPE HTML>
<meta charset="utf-8" />
<title>HTML partial updates: patching via innerHTML</title>
<link rel=help href="https://github.com/WICG/declarative-partial-updates">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="placeholder">Old content in light DOM</div>
<div id="container"></div>
<script>
test(() => {
    const placeholder = document.getElementById("placeholder");
    const container = document.getElementById("container");
    assert_equals(placeholder.textContent, "Old content in light DOM");
    container.innerHTML = "<template patchfor=placeholder>New content</template>";
    assert_equals(placeholder.textContent, "New content");
    // The <template> element should not be inserted, so no child nodes.
    assert_false(container.hasChildNodes(), "container has child nodes");
}, "<template patchfor> in innerHTML patching outer element");
</script>