appverse

The applet command for making apps for Appverse: small web apps (plain HTML, CSS and JavaScript) that run safely in the browser, in a sandbox with no network access, packed as .applet files.

Needs Node.js 20 or newer.

npx appverse new my-app          start an app from the starter template
cd my-app
npx appverse dev                 run it in the browser sandbox, reloading each time you save a file
npx appverse check               look for mistakes and warnings (--strict makes warnings fail)
npx appverse pack                build my-app.applet
npx appverse inspect app.applet  list a package's manifest and files
npx appverse unpack app.applet   extract a package

Install it once with npm install -g appverse and the command is just applet (for example applet dev).

applet check finds what would stop an app from working in the sandbox: files or URLs that are not in the package, network calls, localStorage and cookies, a bridge call without its permission, ES module imports. Drop the packed file on https://appverse.lol to run it.

• Guide: https://appverse.lol/make.html
• Specification: https://appverse.lol/spec.html
• Pack and test in the browser, no install: https://appverse.lol/pack.html

MIT licensed.