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<!DOCTYPE HTML>
<meta charset="utf-8" />
<title>HTML partial updates</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</div>
<template patchfor="placeholder">New content</template>
<script>
test(() => {
assert_equals(document.querySelector("#placeholder").innerText, "New content");
assert_equals(document.querySelector("template[patchfor]"), null, "<template patchfor> with a match should not attach");
}, "<template patchfor> should apply directly to its target");
test(() => {
const doc = document.implementation.createHTMLDocument();
doc.write('<div id="placeholder">Old content</div>');
assert_equals(doc.querySelector("#placeholder").innerText, "Old content");
doc.write('<template patchfor="placeholder">');
assert_equals(doc.querySelector("template"), null);
assert_equals(doc.querySelector("#placeholder").innerText, "");
doc.write('<span>New</span>');
assert_equals(doc.querySelector("#placeholder").innerText, "New");
doc.write('<span> content</span></template>');
assert_equals(doc.querySelector("#placeholder").innerText, "New content");
assert_equals(doc.querySelector("template"), null);
}, "<template patchfor> should work when chunked");
test(() => {
const doc = document.implementation.createHTMLDocument();
doc.write('<div id="placeholder">Old content</div>');
assert_equals(doc.querySelector("#placeholder").textContent, "Old content");
doc.write('<template patchfor="placeholder">');
doc.write('<div id=main>Hello ');
doc.write('main</div></template>');
assert_equals(doc.querySelector("#placeholder #main").textContent, "Hello main");
}, "<template patchfor> should work when elements are sliced in the middle");
</script>
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