Important caveat of private fields: You can’t use them together with proxies.

Highlights:

• Test API:
  • test.skip('name', () => {}) is equivalent to
    test('name', {skip: true}, () => {})
  • test.only('name', () => {}) is equivalent to
    test('name', {only: true}, () => {})
  • test.todo('name', () => {}) is equivalent to
    test('name', {todo: true}, () => {})
• URLSearchParams:
  • It’s now possible to delete all entries that have both a given key and a given value (vs. only a given key): urlSearchParams.delete(key, value)
  • Similarly, we can check if an entry exists that has both a given key and a given value: urlSearchParams.has(key, value)

Highlights:

• New JavaScript bundler and minifier
• Standalone executables
• Use import.meta.main to check if the current file is the entry point that started bun.

Stage changes:

• Stage 4: The first ECMAScript 2024 features!
  • Well-formed unicode strings
  • Asynchronous atomic wait
  • RegExp v flag with set notation + properties of strings (blog post)
• Stage 3:
  • Decorator metadata
  • Float16Array
• Stage 2:
  • Uint8Array to/from base64 and hex
  • Promise.withResolvers()
  • Handling time zone canonicalization changes
  • Array grouping (blog post): temporarily demoted from stage 2 until web compatibility issues are solved

Tests how well legacy CommonJS modules interoperate with ECMAScript modules on various JavaScript platforms.

For more information on this topic, check out “How to write CommonJS exports that can be name-imported from ESM”.

“The year is 2023 and we’ve released Node.js v20. It’s a significant accomplishment, and this article aims to use scientific numbers to assess the state of Node.js’ performance.”

“Run your JavaScript on WebAssembly. Javy takes your JavaScript code, and executes it in a WebAssembly embedded JavaScript runtime. Javy can create very small Wasm modules in the 1 to 16 KB range with use of dynamic linking. The default static linking produces modules that are at least 869 KB in size.”