Bun v0.0.42

[Jarred-Sumner]

To upgrade:

bun upgrade

bun run

bun run now has tab completions for zsh and fish that show scripts from package.json and bins from node_modules/.bin.

Install:

bun upgrade
bun completions 

Going forward, bun upgrade also updates completions, so you shouldn't have to do that again.

Bun.js

Bun now has a builtin "supports-color" polyfill, the package used by chalk to detect ANSI color support.

The TypeScript in this screenshot runs 2x faster in Bun.js than in Node.js:

Other stuff:

• node-fetch & isomorphic-fetch polyfills work now. When an npm package imports node-fetch, Bun.js will automatically replace it with Bun's native implementation.
• Bun.sleep(ms) lets you synchronously sleep. No promises
• Fixed an edgecase with the CommonJS transform that affected export default (thank you @evanwashere for flagging)
• Several more encoding issues specific to the JavaScriptCore integration were found & fixed, though there are a couple more I still need to fix.

JavaScript Lexer

• Fixed a regression with \0 (and added an integration test)

Misc

• --version now prints a newline at the end
• -v is now shorthand for --version
• Fixed spacing with the CLI help menu (thanks @KishanBagaria for flagging)
• -u is now shorthand for --origin. Might rename that to --url in a future release.

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This discussion was created from the release Bun v0.0.42.