tsup

Rollup + ESBundle.

This library is intentionally kept simple, if you want customizations please use Rollup directly.

Why Rollup?

Rollup is at least an order of magnitude slower than ESBuild, why not use ESBuild directly?

Because ESBuild isn't mature enough, here we use Rollup to bundle .d.ts files, add code splitting support, import non-js assets etc.

Install it locally in your project folder:

npm i tsup -D
# Or Yarn
yarn add tsup --dev

You can also install it globally but it's not recommended.

tsup [...files]

Files are written into ./dist.

tsup index.ts --dts

This will emit ./dist/index.js and ./dist/index.d.ts.

tsup [...files] --bundle

dependencies in your packages.json are always excluded, you can also use --external <module> flag to mark specific package as external.

When you're bundling a lot files, this can be 10x~200x slower than ESBuild.

tsup run main.ts

For more details:

tsup --help