Ezno is work in progress. It doesn't currently support all the features of JavaScript and TypeScript but it has a fairly large specification of features that it supports today.
While it is not worth it trying it on existing codebases at this time (as it likely will blow up 💥), you can try out the snippets in the specification and other small pieces of code today.
The best way to try the type checker is on the web playground.
Alternative you can try the checker locally using the check command of ezno binary. The simplest way is using npx
npx ezno check file.tsYou can also download the binary with npm install ezno. Or for the native (non WASM version) you can get it with cargo install ezno or on GitHub releases.
You can use the print_type function to see the type of expressions.
const x = 6;
print_type(x + 8)If you find any unexpected exceptions, please leave an issue 😁