2.4.0 (2022-04-15)

Downloads

Added

• Missing parentheses around a self-invoked arrow function are now reported as
  E0211. (Implemented by Sarah Schulte.)
• E0179 is now reported if a JSX element such as <div /> follows return
  (implemented by Rob Miner).

Fixed

• <div> <> </> </div> (a JSX fragment inside a JSX element) no longer reports
  a syntax error.

Changed

• Windows builds (x86, x64, ARM, and ARM64) are now built with MinGW's C and C++
  runtime libraries instead of Microsoft's. This fixes a compliance issue with
  GPLv3.

2.3.1 (2022-03-24)

Downloads

Added

• Windows: The 32-bit x86 builds are now code-signed.
• Windows: Tab-completion now works in PowerShell. (Completion needs to be
  installed manually.) (Implemented by Tony
  Sathre.)

Fixed

• The executable files shared between the npm packages and the static builds are
  now identical. (Previously, the files sometimes differed because they were
  code-signed independently. Code signing is non-deterministic.)

2.3.0 (2022-02-24)

Downloads

Added

• An incomplete class now reports E0199 instead of failing with the
  catch-all E0054. (Thanks to Dave Churchill for reporting.)
• Statements before the first case in a switch now report E0198
  (implemented by Himanshu).
• When building from source, you can tell quick-lint-js to use your copy of
  third-party dependencies instead of quick-lint-js' bundled
  dependencies:
  • -DQUICK_LINT_JS_USE_BUNDLED_BOOST=OFF: Use your own copy of Boost.
  • -DQUICK_LINT_JS_USE_BUNDLED_GOOGLE_BENCHMARK=OFF: Use your own copy of Google Benchmark (benchmarks only).
  • -DQUICK_LINT_JS_USE_BUNDLED_GOOGLE_TEST=OFF: Use your own copy of Google Test (tests only).
  • -DQUICK_LINT_JS_USE_BUNDLED_SIMDJSON=OFF: Use your own copy of simdjson.

2.2.0 (2022-02-17)

Downloads

Fixed

• x && <Element/> no longer falsely reports E0026 (missing operand for
  operator). (Thanks to Piotr Dąbrowski for reporting.)
• In top-level code, await <x/> is now parsed as the await operator followed
  by a JSX element (rather than await less-than-compared to x, followed by
  jibberish).

Changed

• Homebrew: Emacs Lisp files are now installed in
  <brew>/share/emacs/site-lisp/quick-lint-js (per brew audit's
  recommendation) instead of in share/emacs/site-lisp.

[E038...

2.1.0 (2022-02-09)

Downloads

Fixed

• Curried arrow functions like a => b => { a; b; } no longer falsely reports
  E0057. (Thanks to Christian Mund for reporting.)

2.0.0 (2022-02-08)

Downloads

Added

• quick-lint-js now supports JSX syntax in both .js and .jsx files.
• New diagnostics for JSX: E0019, E0181, E0182, E0183,
  E0186, E0187, E0189, E0191, E0192, E0193
• if (...) {...} else (...) {...} now reports E0184 ('missing if after
  else') (implemented by Himanshu).
• if (x = "") now reports E0188 ('= changes variables; to compare, use
  === instead').
• if (a == "X" || "Y") now reports E0190 ('missing comparison; === does
  not extend to the right side of ||').
• async (param1, param2) {} now reports E0176 ('missing arrow operator for
  arrow function'). (E0176 was previously reported only for non-async
  arrow functions.)
• let x = 'nah'; if (y) { let x = 'yah'; } now reports E0196 ('new
  variable shadows existing variable'). This warning is reported only when an
  assignment (instead of a new variable declaration) was intended.
• console.log(“hello world”); now reports E0197 (''“' is not allowed for
  strings; use " instead').
• -1 ** 2 now reports E0194 (missing parentheses around left-hand side of
  **).
• typeof 10 ** 7 now reports E0195 (missing parentheses around operand of
  typeof).

Fixed

• LSP: When responding to unsupported methods with error code -32601,
  quick-lint-js now includes the request ID. (Previously, the "id" field was
  always null.)
• CLI: If a crash occurs due to E0054 or E0203, the CLI no longer
  crashes (e.g. with an illegal instruction error).
• quick-lint-js no longer ignores elements of assigned arrays. For example,
  [fisrt, second] = s.split(' '); will now report E0057 for fisrt (if
  fisrt is not declared).
• quick-lint-js no longer incorrectly reports E0176 (missing arrow operator
  for arrow function) if the extends clause for a class is parenthesized
  and contains commas (e.g. class A extends (B, C) {}).
• quick-lint-js no longer incorrectly reports E0016, E0038, E0060,
  or E0207 in tagged template literals. (These errors are still reported for
  untagged template literals and for string literals.)

Changed

• Assigning to an imported variable now reports E0185 ('assignment to
  imported variable') instead of E0003 ('assignment to const variable')
  (implemented by Matheus de Sousa).

1.0.0 (2021-12-13)

Downloads

Added

• Windows: Clang-cl is now able to compile quick-lint-js for Windows.
• E0176 is now reported if the desired arrow function has more than zero
  parameters.
• E0178 is now reported if the arrow function appears in top-level code or
  inside a non-async function.

Fixed

• Arch Linux: The quick-lint-js package now installs correctly if you have
  another Vim plugin package installed. The installation error was: "error: failed
  to commit transaction (conflicting files)"
• (typeof x)=>{} and similar code now reports E0151 (invalid function
  parameter) instead of E0019 (invalid binding in let statement).
• ([(x,)] => {}) now declares x as a parameter instead of ignoring x
  entirely. (It still produces E0180).
• \u0 at the end of a file now reports E0016 (expected hexadecimal digits
  in Unicode escape sequence) instead of E0038 (unclosed identifier escape
  sequence)
• "\u{00a0:" now reports only one error (E0038 (unclosed identifier escape
  sequence)) instead of two (E0038 and E0040 (unclosed string literal)).
• After reporting E0178, the arrow function is parsed as if it was async,
  allowing the body to use await as an operator without error.

Changed

• E0013 is no longer reported for identifiers such as bird\u{360000}.
  E0207 is reported instead.

Optimized

• The Windows .exe is 51% smaller (2.30 MiB -> 1.14 MiB) by making a hash table
  used for translations compile-time-only. See the patch
  here.

0.7.1 (2021-12-06)

Beta release.

Downloads

Added

• npm: The npm package now installs on Windows when using the x86 (32-bit)
  version of Node.js.
• E0036 is now reported in more situations.

Fixed

• npm: The npm package now installs on macOS Apple silicon when using the
  AArch64 (native) version of Node.js. (The package previously worked only on
  macOS Intel, or when using x86_64 Node.js with Rosetta.)

0.7.0 (2021-12-05)

Beta release.

Downloads

Security

• The source archive (quick-lint-js-*.tar.gz) is now signed with our GPG key.
• Arch Linux: The release package on AUR now verifies that the source archive is
  signed with our GPG key.

Added

• New diagnostics: E0053, E0179
• Improve error reporting of console.("hello") and similar code.
• Reported errors now include a link to the website for a detailed explanation
  (implemented by Amir).
• CLI: New --diagnostic-hyperlinks option (implemented by Amir).
• CLI: Fish and Zsh completions for the --output-format option now include
  documentation for each value (implemented by Amir).

Fixed

• Reporting E0144 no longer also reports E0057.
• Variables can be named according to Unicode 14 (previously Unicode 13).
• void 0?a:b=c no longer reports E0020.
• Vim: The Debian package, the Arch Linux package, and the Homebrew package now
  install the coc.nvim plugin and the plugin documentation.
• Neovim: Fixed with newer versions of nvim-lspconfig
  (since commit
  97da7ed12e
  published November 25, 2021).

Optimized

• Identifier parsing is now SIMD-optimized for ARM systems, including Apple
  silicon. See the patch
  here.
• Diagnostic message translations consume less space in executables and also
  take less time to process. See the patch
  here.
• Expression ASTs are now garbage-collected during parsing, reducing peak memory
  usage (and as a side effect making parsing faster). See the patch
  here.

[E0278]...

0.6.0 (2021-11-20)

Beta release.

Downloads

Added

• Various new diagnostics (implemented by Himanshu and Matheus de
  Sousa).
• VS Code: The new quick-lint-js.logging setting allows you to show
  quick-lint-js' internal log messages in an Output window.
• VS Code: Apple silicon (e.g. M1) (ARM64) is now supported.
• VS Code: Linux ARM (32-bit) is now supported.
• Vim: Improved performance for ALE versions v2.5.0 and newer (and v3.0.0 and
  newer). You should configure g:ale_lint_on_text_changed to 'always' for
  the best experience.
• Vim: Improved performance of the ALE plugin by using the LSP server by
  default.
• The macOS and Windows binaries are now code-signed.
• Emacs (Eglot): You no longer need to type M-x eglot in order to start
  linting. Apply this fix by adding (eglot-ensure) to your init
  file.
• quick-lint-js now understands the AggregateError, FinalizationRegistry,
  and WeakRef ECMAScript global variables by default.
• The macOS and Windows executables now include embedded code signatures. These
  signatures are made with a self-signed certificate.
• The Linux executables are now signed with a GPG signature (.asc files).
• Vim: coc.nvim is now supported.
• quick-lint-js has a new mascot, Dusty. Say hello! (Artwork by Jenny
  "Jennipuff" Wheat).
• Translations: German (implemented by Nico Sonack)

Fixed

• macOS: quick-lint-js no longer hangs if a file is changed in your home
  directory or project directory.
• Various crashes on invalid code have been fixed.
• quick-lint-js consumes less memory for pathological code patterns.
• VS Code: The extension no longer tries to load an ARM64 DLL on Windows x64.
• The npm package and the manual builds are now much smaller and faster. (They
  were previously compiled in debug, unoptimized mode.)
• delete x no longer reports a warning if x is a global variable.
• JSX: Instead of reporting a bunch of errors, quick-lint-js now tells you that
  JSX syntax is not yet supported.
• FreeBSD: Fixed build.
• E0073, E0094, E0104, E0106, E0111, and E0119 now point
  to a more helpful place (implemented by strager and Amir).
• for (let x = a in b; c; d) {} now reports E0108 instead of reporting
  E0173, E0110, and E0110 again.

Changed

• Error codes now have four decimal digits instead of three. For example, E001
  is now called E0001.
• LSP benchmarks have been rewritten. The new benchmarks should produce more
  stable numbers and be fairer to linters with a high start-up time such as
  Flow.

Removed

• quick-lint-js no longer looks for files named .quick-lint-js.config. To
  configure quick-lint-js, name your file quick-lint-js.config instead.