s2 is a function for reactive web UI.

See the documentation page for usage details.

See js-framework-benchmark results table.

• s2.debug: turn on messages in the console. Warning: has a performance impact.
• s2.isDeferred (experimental): this will defer setting proxy values until the next frame. This might be preferable if there is significant blocking in between updates. However, it can break functionality in case there are updates that depend on a previous update in the same tick.
• s2.window: set a different global object for server-side rendering.

s2 is written in the Parenscript subset of Common Lisp.

• parenscript-builder: see instructions
• terser: npm i -g terser to add this executable to $PATH

Need to build the psbuild binary from parenscript-builder and put it here to compile with make. I couldn't figure out how to automate including this dependency yet.

Run automated tests with Deno:

make && deno test

Run a web server like http-server . and then navigate to the /test/ directory. HTTP is required for loading modules.

s2 is short for simulacra 2. Prior art: I wrote a similar library that is limited to ES5, so no proxies.

BSD 3-Clause