One file, no network
clay.js is a 3 KB bootstrap that fetches the modules a page asked for. The standalone build is every one of those modules in a single readable file. Download it once, keep it beside your HTML, and the page loads with no connection at all.
clay.standalone.js
About 1 MB of readable source. MIT-0 for the clayjs code; the third-party notices for the libraries inside are on the first lines of the file. /v1/clay.standalone.js is the newest 1.x; /1.1.0/clay.standalone.js is that exact release, forever. The first line of the file names its version. It is also in the npm package, at dist/clay.standalone.js.
The same tag, pointed at the file
<script src="clay.standalone.js?plugins=sync"></script>Same query params as clay.js: plugins and exclude. Everything is inside the file, so plugins= decides what runs, not what downloads. The satellites are inside too: await clay.loaded.ui, clay.loaded.sap and the rest work without a tag of their own.
Always on means always on: the ui satellite's automatic Saved and Couldn't save toasts run on your page, and the element helpers (el.nearest, el.val and friends) are installed, whether or not you asked. Listen for the clay:save-* events yourself if you want your own feedback. If your page already had satellite tags, delete them: a second sap.js mounts a second runtime and every action runs twice.
The file never changes under you. A page depends on the bytes it has, not on a server. You can even paste the whole file into a <script> block; the query params then have nowhere to go, so the defaults apply.
Offline still needs a writer
The library is now on your disk. Saving is a separate job: something has to take the edited document and write the bytes. HTML Clay does that on the machine itself, with no network. It serves the file at 127.0.0.1, stamps the save token that switches clayjs into edit mode, and writes every save back to disk. Wi-Fi off, everything works.
A file opened straight from disk (file://) loads and renders, but has nowhere to post a save to. It stays in view mode unless you force edit mode, and then a save reports an error and your edits stay in the tab.
What still reaches out
Both are opt-in, and both fail soft.
| What | When | Offline |
|---|---|---|
| The CMS sidebar's font, from jsDelivr | plugins=cms | Falls back to your system monospace. The sidebar works the same. |
| A diff library, from esm.sh | Autosave debugging, switched on with localStorage.setItem("clay:debug:autosave", "true") | The debug log loses its diffs. Autosave itself is unaffected. |
When you want a newer clayjs
Download again and replace the file. Nothing else changes: the tag, the params and your document stay as they are. To see what you have, read the first line of the file.
The rolling /v1/ URL updates on its own for pages that load from the network. A file you downloaded does not, on purpose.