oxlint v0.0.21

What's Changed

Features

Read eslint JSON configuration (experimental)

Added the configuration flag -c .eslintrc.json.

Oxlint will override all the enabled rules to what's specified in rules, e.g.

{
    "rules": {
        "eqeqeq": "off",
        "curly": "error",
        "quotes": ["error", "double"]
    }
}

• Parse eslint configuration by @camc314 in #1146
• Read jsx-a11y settings by @msdlisper in #1668

New Rules

• eslint-plugin-jsx-a11y: no-access-key (correctness) by @yoshi2no in #1708
• eslint-plugin-jsx-a11y: tabindex-no-positive (correctness) by @yoshi2no in #1677
• eslint-plugin-import: export rule (nursery) by @mysteryven in #1654
• eslint-plugin-unicorn: no-null (style) by @Ken-HH24 in #1705
• eslint-plugin-unicorn: prefer-dom-node-text-content (style) by @Ken-HH24 in #1658
• eslint-plugin-unicorn: prefer-prototype-methods (pedantic) by @haocheng6 in #1660

vscode

• use icon to represent enabled status by @IWANABETHATGUY in #1675
• add option to control enable/disable oxc linter by @IWANABETHATGUY in #1665
• report problem more accurately by @IWANABETHATGUY in #1681

Fixes

• fix(parser): false postive for "Missing initializer in const declaration" in declare + namespace by @Boshen in #1724
• convert catch error name to a warning by @camc314 in #1700
• Don't check for multiple bits at once. by @AndyA in #1688
• Fix false positives in prefer string start, ends with, port more test cases by @camc314 in #1689
• Panic in prefer string starts, ends with by @camc314 in #1684
• excape_case by @RiESAEX in #1673
• false positive in jsx key by @camc314 in #1686
• improve diagnostic for no useless spread by @camc314 in #1698
• perf(linter): find class node by symbols in get_parent_es6_component by @Dunqing in #1657
• refactor(linter): make some jest rules report more detailed by @mysteryven in #1666

New Contributors

• @HerringtonDarkholme made their first contribution in #1680
• @yoshi2no made their first contribution in #1677
• @fireairforce made their first contribution in #1682
• @AndyA made their first contribution in #1688

Full Changelog: oxlint_v0.0.20...oxlint_v0.0.21

oxlint v0.0.20

What's Changed

• eslint-plugin-unicorn: prefer-modern-dom-apis (style) by @Ken-HH24 in #1646
• eslint-plugin-react: react-in-jsx-scope by @camc314 in #1025
• eslint plugin unicorn: prefer array flat by @camc314 in #1650
• vscode: add a option to control oxc lint timing by @IWANABETHATGUY in #1659
• improve span for no accumulating spread by @camc314 in #1644

Full Changelog: oxlint_v0.0.19...oxlint_v0.0.20

oxlint v0.0.19

Try it out!

• Run npx --yes oxlint@latest from your terminal
• Install the Vscode extension https://marketplace.visualstudio.com/items?itemName=oxc.oxc-vscode

New Rules

Performance

This is a new category turned off by default. See it in action with

npx --yes oxlint@latest -D perf

• no accumulating spread by @DonIsaac in #1607

Did you know that the reudce + ...spread combo is an O(n^2) operation?

Read https://prateeksurana.me/blog/why-using-object-spread-with-reduce-bad-idea/ for detailed explaination.

noAccumulatingSpread is also part of Biome since v1.

Correctness

• eslint-plugin-unicorn: no-useless-length check by @radu2147 in #1541
• eslint-plugin-unicorn: no-useless-spread by @camc314 in #1638
• eslint-plugin-unicorn: prefer-set-size by @camc314 in #1508
• eslint-plugin-jsx-a11y: anchor-is-valid for by @msdlisper in #1477
• eslint-plugin-jsx-a11y: heading-has-content for by @Ken-HH24 in #1501
• eslint-plugin-jsx-a11y: iframe-has-title rule by @Shinyaigeek in #1589
• eslint-plugin-jsx-a11y: img-redundant-alt by @Shinyaigeek in #1571
• eslint-plugin-jsx-a11y: no-autofocus by @msdlisper in #1641
• eslint-plugin-jsx-a11y: scope by @Shinyaigeek in #1609
• eslint-plugin-react: no-is-mounted for by @Ken-HH24 in #1550

Pedantic

• eslint-plugin-unicorn: prefer-native-coercion-functions (pedantic) by @camc314 in #1507
• eslint-plugin-unicorn: no-unreadable-iife by @haocheng6 in #1572
• eslint-plugin-unicorn: escape-case by @RiESAEX in #1495
• eslint-plugin-unicorn: explicit-length-check by @RiESAEX in #1617

Suspicious

• eslint: no-empty-static-block by @radu2147 in #1543

Restriction

• eslint-plugin-unicorn: no-array-foreach by @camc314 in #1613
• eslint-plugin-unicorn: no-array-reduce by @camc314 in #1610
• eslint-plugin-unicorn: prefer number properties by @camc314 in #1614

Style

• eslint-plugin-unicorn: no-await-expression-member by @Ken-HH24 in #1569
• eslint-plugin-unicorn: no-unreadable-array-destructuring (style) by @Ken-HH24 in #1594
• eslint-plugin-unicorn: numeric-separators-style (style) by @sirreal in #1490
• eslint-plugin-unicorn: prefer-node-protocol by @IWANABETHATGUY in #1618
• eslint-plugin-unicorn: prefer-reflect-apply(style) by @Ken-HH24 in #1628
• eslint-plugin-unicorn: require-array-join-separator(style) by @Ken-HH24 in #1608

Fixes

• feat(ast): implement new proposal-import-attributes by @magic-akari in #1476
• fix(linter): fix panic in no hex escape by @camc314 in #1540

New Contributors

• @JonaAnders made their first contribution in #1496
• @Shinyaigeek made their first contribution in #1571
• @milesj made their first contribution in #1510

Full Changelog: oxlint_v0.0.18...oxlint_v0.0.19

oxlint v0.0.18

Try it out!

• Run npx --yes oxlint@latest from your terminal
• Install the Vscode extension https://marketplace.visualstudio.com/items?itemName=oxc.oxc-vscode

oxlint has 78 correctness rules turned on by default, with 164 rules in total.

What's Changed

Features

• Add --deny-warnings flag by @shannonrothe in #1452

If you wish to fail CI with exit code 1, pin oxlint to a version and use the --deny-warnings flag:

npx oxlint@0.0.18 --deny-warnings

Notice $? prints 1.

New Rules

Correctness

• eslint-plugin-unicorn: no document cookie by @camc314 in #1255
• eslint-plugin-unicorn: prefer string starts ends with by @camc314 in #1246
• eslint-plugin-jsx-a11y: anchor-has-content by @msdlisper in #1431
• eslint-plugin-jsx-a11y: html-has-lang for by @Ken-HH24 in #1436

Pedantic

• eslint-plugin-unicorn: no lonely if by @camc314 in #1252
• eslint-plugin-unicorn: no negated condition by @camc314 in #1253
• eslint-plugin-unicorn: no this assignment by @camc314 in #1250
• eslint-plugin-unicorn: no typeof undefined by @camc314 in #1251
• eslint-plugin-unicorn: no useless promise resolve reject by @camc314 in #1254
• eslint-plugin-unicorn: prefer array some by @camc314 in #1467
• eslint-plugin-unicorn: prefer dom node append by @camc314 in #1256
• eslint-plugin-unicorn: prefer dom node dataset by @camc314 in #1257
• eslint-plugin-unicorn: prefer dom node remove by @camc314 in #1472
• eslint-plugin-unicorn: prefer event target by @camc314 in #1465
• eslint-plugin-unicorn: prefer math trunc by @camc314 in #1466
• eslint-plugin-unicorn: prefer string replace all by @camc314 in #1248
• eslint-plugin-unicorn: no useless switch case by @camc314 in #1463
• eslint-plugin-unicorn: no-hex-escape by @RiESAEX in #1410

Restriction

• eslint: no-regex-spaces by @ivov in #1129
• eslint-plugin-unicorn: no-abusive-eslint-disable by @haocheng6 in #1125
• eslint-plugin-unicorn: no-nested-ternary by @haocheng6 in #1417

Style

• eslint plugin unicorn: empty-brace-spaces by @radu2147 in #1249
• eslint plugin unicorn: no zero fractions by @camc314 in #1464
• eslint plugin unicorn: prefer includes by @camc314 in #1471
• eslint-plugin-unicorn: prefer string slice by @camc314 in #1247
• eslint-plugin-unicorn: number-literal-case by @haocheng6 in #1271
• eslint-plugin-jest: max_expects by @eryue0220 in #1239
• eslint-plugin-jest: no-deprecated-function by @eryue0220 in #1316

Fixes

• eslint(for-direction): add check for condition in reverse order by @ild0tt0re in #1418
• Fix catch error name with parenthesis by @camc314 in #1242
• Fix no instanceof array with parenthesis by @camc314 in #1243
• Fix no object as default param with parenthesis by @camc314 in #1244
• Fix prefer date now with parenthesis by @camc314 in #1245
• Fix prefer logical operator error with parenthesis by @camc314 in #1241
• Fix prefer type error with parenthesis by @camc314 in #1240
• fix(parser): Disallow ReservedWord in NamedExports by @magic-akari in #1230

Misc

• Rust v1.74.0 by @Boshen in #1357

New Contributors

• @msdlisper made their first contribution in #1223
• @radu2147 made their first contribution in #1249
• @sirreal made their first contribution in #1416
• @Ken-HH24 made their first contribution in #1436

Full Changelog: oxlint_v0.0.17...oxlint_v0.0.18

oxlint v0.0.17

Try it out!

• Run npx --yes oxlint@latest from your terminal
• Install the Vscode extension https://marketplace.visualstudio.com/items?itemName=oxc.oxc-vscode

What's Changed

Features

The final dot is no longer required by the CLI #1201:

npx oxlint@latest

This is the same as npx oxlint@latest ., where the current working directory will be scanned.

This is an alignment with ESLint v9, see https://eslint.org/blog/2023/11/whats-coming-in-eslint-9.0.0/#running-eslint-with-no-file-arguments

What's Changed

New rules by category

Style

• eslint-plugin-unicorn: prefer-optional-catch-binding by @camc314 in #1188
• eslint-plugin-unicorn: prefer-spread by @camc314 in #1186

Fixes

• fix(linter): fix handling of repeated eslint-disable comments by @haocheng6 in #1200

Full Changelog: oxlint_v0.0.16...oxlint_v0.0.17

oxlint v0.0.16

Try it out!

• Run npx --yes oxlint@latest . from your terminal
• Install the Vscode extension https://marketplace.visualstudio.com/items?itemName=oxc.oxc-vscode

What's Changed

Features

Use the following cli flags to enable the import / jest / jsx-a11y plugins

Enable Plugins
        --import-plugin       Enable the experimental import plugin and detect ESM problems
        --jest-plugin         Enable the Jest plugin and detect test problems
        --jsx-a11y-plugin     Enable the JSX-a11y plugin and detect accessibility problems

New rules by category (19 in total)

Correctness (turned on by default)

• eslint-plugin-unicorn: no-invalid-remove-event-listener by @camc314 in #1147
• eslint-plugin-unicorn: no-useless-fallback-in-spread @camc314 in #1176
• eslint-plugin-jsx-a11y: alt-text by @manzt in #1126

Suspicious

• eslint-plugin-unicorn: no-new-array by @camc314 in #1160
• eslint-plugin-unicorn: prefer-add-event-listener by @camc314 in #1175

Pedantic

• eslint-plugin-unicorn: prefer-type-error by @camc314 in #1149
• eslint-plugin-unicorn: new-for-builtins by @camc314 in #1159
• eslint-plugin-unicorn: no-new-buffer by @camc314 in #1174
• eslint-plugin-unicorn: prefer-date-now by @camc314 in #1150
• eslint-plugin-unicorn: prefer-regex-test by @camc314 in #1187
• eslint-plugin-unicorn: no-static-only-class by @camc314 in #1161
• eslint-plugin-unicorn: prefer-blob-reading-methods by @camc314 in #1168
• eslint-plugin-unicorn: prefer-code-point by @camc314 in #1167
• eslint-plugin-unicorn: no-object-as-default-parameter by @camc314 in #1162

Style

• eslint-plugin-unicorn: prefer-string-trim-start-end by @camc314 in #1148
• eslint-plugin-jest: prefer-todo rule by @eryue0220 in #1065
• eslint-plugin-react(jsx_key): ignore ObjectProterty nodes by @yesmeck in #1139
• eslint: default-case-last by @PerfectPan in #1156

Nursery

• eslint-plugin-import: no-amd by @qinyuhang in #1171
• eslint-plugin-jest: no-hooks by @eryue0220 in #1172

Fixes

• reduce the lookup times of Call Expression in Jest rules by @mysteryven in #1184
• parse configuration for unicorn/filename-case by @camc314 in #1145
• fix covered span of eslint-disable-next-line comments by @haocheng6 in #1128

New Contributors

• @Ubugeeei made their first contribution in #1136
• @PerfectPan made their first contribution in #1156
• @qinyuhang made their first contribution in #1171

Full Changelog: oxlint_v0.0.15...oxlint_v0.0.16

oxlint v0.0.15

What's Changed

• fix(linter) Improve span for jsx key by @camc314 in #1040
• feat(linter): eslint-plugin-react/no-find-dom-node by @haocheng6 in #1031
• reactor(linter): Refactor jsx key rule to use static_property_info by @camc314 in #1043
• feat(linter): eslint-plugin-react(no-unescaped-entities) by @camc314 in #1044
• feat(linter): support react/no-render-return-value by @Dunqing in #1042
• feat(linter): eslint-plugin-react no-string-refs by @manzt in #1053
• feat(linter): eslint-plugin-unicorn - no-empty-file by @camc314 in #1052
• feat(linter) eslint-plugin-unicorn - text-encoding-identifier-case by @camc314 in #1051
• feat(linter): support react/no-string-refs by @Dunqing in #1055
• feat(linter) eslint-plugin-unicorn - prefer-logical-operator-over-ternary by @camc314 in #1064
• fix(linter): noTemplateLiterals configuration in no_string_refs rule not working by @Dunqing in #1063
• fix(linter) fix incorrect reporting for no_useless_escape by @camc314 in #1062
• feat(linter): eslint-plugin-unicorn switch-case-braces by @Dywanoid in #1054
• feat(linter): eslint-plugin-unicorn require-number-to-fixed-digits-argument by @Dywanoid in #1073
• fix(linter) Fix panic on no_mixed_operators rule by @camc314 in #1094
• fix(linter) Fix panic on no useless escape by @camc314 in #1092
• fix(linter) Fix panic when using ban ts comment on conformace tests by @camc314 in #1097
• fix(linter) Report error instead of panicing if the file fails to open by @camc314 in #1098
• fix(linter): revert changes to JSX attribute strings by @Boshen in #1101
• fix(linter): fix panic in no_unescaped_entities by @Boshen in #1103
• fix(linter/no_empty_file): point to start of file instead of the entire file by @Boshen in #1105
• feat(linter/no_children_prop): point the span to "children" by @Boshen in #1106
• feat(linter): support unicorn/prefer-query-selector by @Dunqing in #1068
• feat(linter): demote prefer_array_flat_map to style by @Boshen in #1108
• fix(linter/no_render_return_value): fix false positive when nested inside an arrow expression by @Boshen in #1109
• chore(linter/no_unescaped_entities): demote to pedantic by @Boshen in #1110
• fix(linter/no-render-return-value): remove duplicate test case by @Dunqing in #1111
• feat(linter): change some rules pedantic and improve help message by @Boshen in #1112
• chore(linter): move all import plugin rules to nursery by @Boshen in #1113

New Contributors

• @Dywanoid made their first contribution in #1054
• @ivov made their first contribution in #1096

Full Changelog: oxlint_v0.0.14...oxlint_v0.0.15

oxlint v0.0.14

Try it out!

Run

• npx --yes oxlint@latest . in your JavaScript / TypeScript codebase and see it complete in milliseconds. No configurations required.
• npx oxlint@latest --help for usage instructions.
• npx oxlint@latest --rules for list of rules.

What's Changed

Linter

New Rules

• typescript-eslint: ban-types by @camc314 in #953
• eslint-plugin-jest: valid-expect by @mysteryven in #941
• eslint-plugin-jest: no-identical-title by @mysteryven in #957
• eslint-plugin-jest: valid-title by @mysteryven in #966
• eslint-plugin-jest: no-confusing-set-timeout by @eryue0220 in #938
• eslint-plugin-unicorn: filename-case by @Boshen in #978
• eslint-plugin-unicorn: catch-error-name by @camc314 in #984
• eslint-plugin-unicorn: no-console-spaces by @camc314 in #991
• eslint-plugin-unicorn: error-message by @camc314 in #992
• eslint-plugin-unicorn: prefer-array-flat-map by @camc314 in #997
• eslint-plugin-unicorn: throw-new-error by @camc314 in #1005
• eslint-plugin-react: jsx-key by @camc314 in #1016
• eslint-plugin-react: no-children-prop by @camc314 in #1015
• eslint-plugin-react: no-useless-fragment by @camc314 in #1021
• eslint-plugin-react: jsx-no-duplicate-props by @camc314 in #1024
• eslint-plugin-react: no-dangerously-set-inner-html by @camc314 in #1029
• eslint-plugin-react: jsx-no-comment-text-nodes by @camc314 in #1027

Fixes

• fix panic when no paths are provided by @camc314 in #944
• Fix oxlint --quiet suppressing errors by @developit in #1008
• fix panic with strip_prefix by @Boshen in #1013
• fix panic when linting declaration files by @camc314 in #1014
• incorrect reporting for jsx_key by @camc314 in #1020

Parser

• feat(parser): TypeScript 5.2 by @camc314 in #811
• fix(lexer) Fix spans for jsx children by @camc314 in #1030

New Contributors

• @camc314 made their first contribution in #944

Full Changelog: oxlint_v0.0.13...oxlint_v0.0.14

oxlint v0.0.13

What's Changed

• feat(linter): add typescript/no-explicit-any by @DonIsaac in #881
• feat(linter): eslint-plugin-import(no-cycle) by @Boshen in #890
• feat(linter): add eslint-plugin-import/default by @mysteryven in #895
• feat(linter): add no-console rule by @todor-a in #887
• feat(linter): implement eslint-plugin-unicorn/no-thenable rule by @Devin-Yeung in #910
• Fix: return 0 exit code when warnings<max_warnings by @developit in #933

Performance

• perf(cli): force terminal_links to reduce sys calls by @Boshen in #911
• perf(lexer): remove an extra branch from identifier_name_handler by @Boshen in #912
• perf(lexer): only check the first lower case for match_keyword by @Boshen in #913
• perf(parser): remove an extra branch from parse_member_expression_rhs hot path by @Boshen in #896
• perf(lexer): reduce an extra branch from peek by @Boshen in #841
• perf(linter): swap the order of checks for no_caller by @Boshen in #844
• perf(linter): parse ts-directive manually by @Devin-Yeung in #845

Parser Fixes

• fix(parser): parse [+In] in object binding initializer by @Boshen in #874
• fix: ts parsing error by @IWANABETHATGUY in #940

New Contributors

• @todor-a made their first contribution in #887
• @IWANABETHATGUY made their first contribution in #927
• @developit made their first contribution in #933
• @eryue0220 made their first contribution in #683

Full Changelog: oxlint_v0.0.12...oxlint_v0.0.13

oxlint v0.0.12

New Rules

• feat(linter): implement unicorn/no-unnecessary-await (#856)

What's Changed

• fix(linter): no-var-requires not warning if has bindings in ancestors (#799)
• feat(linter): eslint-plugin-jest/expect-expect (#802)
• feat(linter): add eslint-plugin-jest/no_alias_method rule (#818)
• feat(linter): add eslint-plugin-jest/no-conditional-expect rule (#832)
• fix(linter): fix incorrect behaviour for "-D correctness -A rule-name"

Performance

• perf(linter): swap the order of checks for no_caller (#844)
• perf(linter): parse ts-directive manually (#845)

Full Changelog: oxlint_v0.0.11...oxlint_v0.0.12