oven-sh/bun bun-v0.0.22

Bun v0.0.22

on GitHub

Features

• Support resolving "exports" field in package.json. Webpack's guide does a great job explaining the "exports" field.
• Add parsed lines of code counter to bun bun
• Support importing files above the project root. HTTP Requests above the project root are allowlisted to specific file extensions to prevent common webserver security vulnerabilities like reading /etc/passwd. Absolute file path imports always start with abs:. The security questions aren't as relevant for localhost development, but still worth thinking about.
• Support bundling symlinked workspace packages via bun bun. To use this, set "bun": { "alwaysBundle": ["packageName"] } in the project's package.json.
• When bundling JSON, print the output as JSON.parse(jsonString) when the JSON is ASCII. JSON.parse is much faster for JavaScript engines to parse.

Bun.js

• Implement console.time, console.timeEnd
• Implement Bun.readFileBytes() to get a Uint8Array of the file's contents without copying.

Bug fixes

• Fix handling when file metadata store exceeds statically allocated count (at time of writing, 16k)
• Always log errors when generating node_modules.server.bun
• Fix how error lines with strings are highlighted
• Fix parsing/printing JavaScript unicode identifiers
• Slightly improve .env loader string detection
• More correct export default transform for bundled code
• Fix a JavaScript simplification bug involving ternaries
• Fix a JavaScript parsing bug with arrays in function arguments that have default values
• Fix edgecase with bare imports inside .bun
• Fix edgecase with whether to wrap arrow expressions in parentheses when printing
• Fix edgecase when a bundled module with multiple-levels of nested exports have a boolean value for the default export
• Globally define require() so that UMD modules which check for the existence of require() to determine if it's CommonJS use the CommonJS code path instead of the globalThis code path. This is not great.
• Embed regeneratorRuntime so that modules which expect it to be a global work
• Fix crash when loading JS fails really quickly

Misc

• Begin adding integration tests with snapshots that run with HMR disabled & HMR enabled
• Add comment explaining failed package.json parsing optimization
• Elaborate on bun bun in the readme
• Switch to UTF-8 for prefilled strings, remove eagerly loading identifier_name
• Symlinks work but the readme wasn't updated
• Add skeleton code for macros but do not execute them yet