Implementation

Boxes are checked when the implementation is usable, if it’s not complete but checked, should be in the skipped section along with possibly the reason for skipping.

• HTTP API’s

  • HTTP server
    • Bun.serve(), serve.fetch() and alike
      • Server type methods
    • WebSocket server
      • WebSocket event handlers (message, open, close, drain)
      • Pub/Sub functionality (subscribe, publish, unsubscribe)
      • Compression support (perMessageDeflate)
      • WebSocket client (new WebSocket())
  • HTTP client
    • Bun.fetch()

• Bundler

  • Bun.build() (new bundler API)

• Workers

  • Worker constructors
  • Worker posting & receiving messages
  • Worker termination

• Binary data

  • Types
    • ArrayBuffer support
    • TypedArray variants (Uint8Array, etc.)
    • DataView support
    • Buffer compatibility
    • Blob support
    • BunFile type (extending Blob) with specific methods
    • File type (extending Blob)

• Streams

  • Stream types
    • ReadableStream support
    • WritableStream support
    • Direct ReadableStream (optimized version)
    • Async generator streams support
  • Stream API’s
    • Bun.ArrayBufferSink for fast incremental buffer writing
    • Stream conversion utilities (Bun.readableStreamTo* methods)

• File I/O

  • Bunfile type
  • Reading (Bun.file() …)
    • Bun.file(), Bun.text(), Bun.json() …
    • Bun.stdin
    • Bun.stdout
    • Bun.stderr
  • Writing (Bun.write())

• import.meta

  • import.meta.dir
  • import.meta.path
  • import.meta.url
  • import.meta.main
  • import.meta.resolve

• SQL & Databases

  • SQLite
    • new()
    • query()
    • prepare()
    • run()
    • exec()
    • get()
    • all()
    • iterate()
    • values()
    • finalise()
    • close()
  • Redis client
    • Connection methods
    • Commands & operations
  • S3 Object Storage
    • Bun:s3 client
    • Operations (get, put, list, etc.)

• FileSystemRouter

  • Next.js-style routing with Bun.FileSystemRouter
  • Route matching with URLs and paths

• Globals

• $ Shell – if possible to implement

• Child processes

  • Bun.spawn()
    • Bun.spawn() with stdin option.
    • Bun.spawn() with IPC communication
  • Bun.spawnSync()
    • Bun.spawnSync() with stdin option.

• TCP & Network

  • Bun.listen() (TCP server)
  • Bun.connect() (TCP client)
  • UDP sockets

• Transpiler

  • Bun.Transpiler for code transformation

• Hashing

  • Bun.password_hash() and Bun.password_verify()
  • Bun.hash()
  • Bun.CryptoHasher

• HTMLRewriter

  • HTML transformation API
  • Element handlers

• Cookie

  • Bun.CookieMap for parsing and manipulating cookies

• FFI

  • Foreign Function Interface for calling native code
  • C Compiler integration

• Testing

  • Test runner utilities
  • Assertion helpers
  • Mock functionality

• Glob

  • Bun.Glob for file pattern matching

• Utilities

  • Bun.version
  • Bun.revision
  • Bun.env
  • Bun.main
  • Bun.sleep()
  • Bun.sleepSync()
  • Bun.which()
  • Bun.randomUUIDv7()
  • Bun.peek()
  • Bun.openInEditor()
  • Bun.deepEquals()
  • Bun.escapeHTML()
  • Bun.stringWidth()
  • Bun.fileURLToPath()
  • Bun.pathToFileURL()
  • Bun.gzipSync()
  • Bun.gunzipSync()
  • Bun.deflateSync()
  • Bun.inflateSync()
  • Bun.inspect()
  • Bun.nanoseconds()
  • Bun.readableStreamTo*() methods for stream conversion
  • Bun.resolveSync()
  • serialize & deserialize in bun:jsc

• DNS

  • DNS resolver utilities

• Semver

  • Semantic versioning utilities

• Color

  • Terminal color utilities

Skipped

Some implementations were skipped for now. Here is a little list of what I skipped. If you want to help, feel free to implement them and make a PR, or wait until I get to them :)

• Utilities -> Bun.gzipSync: Not sure how to implement this yet.
• Utilities -> Bun.gunzipSync: Not sure how to implement this yet.
• Utilities -> Bun.deflateSync: Not sure how to implement this yet.
• Utilities -> Bun.inflateSync: Not sure how to implement this yet.
• Utilities -> Bun.readableStreamTo*(): Not sure how to implement this.
• Utilities -> serialize & deserialize in bun:jsc: Not sure how to implement this yet.
• DNS: Not stable enough yet.
• import.meta: Gleam modules are not accessible from Bun API’s, maybe through source maps in the future.
• Workers: Not stable enough yet.
• Color: Not implementing because there are enough other packages that implement terminal colors.
• Globals: Not relevant to the scope of this library. (Mostly contains browser-related globals. Some Bun ones, but those ought to be implemented elsewhere.)
• SQLite
  • Query.as(): I don’t think this would fit into the Gleam language.

Workarounds

No documented workarounds right now.