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Add tree state functionality

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aaron.axvig
2026-07-11 21:46:23 -05:00
parent e812fe8b72
commit 20cd4ba6a0
6 changed files with 1435 additions and 6 deletions
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demo/index.html
+35 -1
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@@ -8,20 +8,25 @@
<style>
body { max-width: 40rem; margin: 2rem auto; padding: 0 1rem; font-family: system-ui, sans-serif; }
#selection { padding: 0.75rem; background: #f3f3f3; }
#share-status { min-height: 1.5em; }
</style>
</head>
<body>
<h1>Checkbox Tree</h1>
<p>A representative sample of countries, U.S. states, and North Dakota counties.</p>
<div id="tree"></div>
<p><button id="share" type="button">Copy shareable URL</button></p>
<p id="share-status" role="status"></p>
<h2>Selected places</h2>
<pre id="selection">[]</pre>
<script type="module">
import { CheckboxTree } from "../src/checkbox-tree.js";
import { CheckboxTree, loadManifest } from "../src/checkbox-tree.js";
const output = document.querySelector("#selection");
const manifest = loadManifest(await fetch("./manifest.json").then(response => response.json()));
const tree = new CheckboxTree(document.querySelector("#tree"), {
initiallySelected: true,
manifest,
onSelectionChange({ selectedIds }) {
output.textContent = JSON.stringify(selectedIds, null, 2);
},
@@ -72,6 +77,35 @@
{ id: "country:south-africa", label: "South Africa" },
]);
output.textContent = JSON.stringify(tree.getSelectedIds(), null, 2);
function updateUrl() {
const url = new URL(window.location.href);
url.hash = tree.serializeStateToFragment();
if (url.href !== window.location.href) history.pushState(null, "", url);
}
document.querySelector("#tree").addEventListener("change", updateUrl);
document.querySelector("#tree").addEventListener("click", event => {
if (event.target.closest('.checkbox-tree__toggle')) updateUrl();
});
window.addEventListener("popstate", () => {
tree.restoreStateFromLocation();
output.textContent = JSON.stringify(tree.getSelectedIds(), null, 2);
document.querySelector("#share-status").textContent = "";
});
document.querySelector("#share").addEventListener("click", async () => {
const url = new URL(window.location.href);
url.hash = tree.serializeStateToFragment();
const status = document.querySelector("#share-status");
try {
await navigator.clipboard.writeText(url.href);
status.textContent = "Shareable URL copied.";
} catch {
status.textContent = `Share this URL: ${url.href}`;
}
});
</script>
</body>
</html>