biomejs/biome @biomejs/biome@2.6.6 on GitHub

2.6.6

Patch Changes

#12887 da0422e Thanks @dyc3! - Added the new nursery rule noArrayMethodsOnArguments. It reports calls to array methods on the arguments object, which isn't an array, so these calls throw a TypeError when the code runs.
```
function sum() {
  return arguments.reduce((total, value) => total + value, 0);
}
```
#12877 cd9e10f Thanks @dyc3! - Added the nursery rule noConstantComparisons, which reports && and || conditions that can never be true, are always true, or contain a check with no effect.
```
if (statusCode <= 400 && statusCode > 500) {}
```
#12876 a7c9586 Thanks @dyc3! - Added the nursery rule noErasingOperation, which disallows operations with 0 that always result in zero: multiplying by 0, a bitwise AND with 0, and dividing 0 by a number. The other value in these operations has no effect on the result, which usually means the code has a mistake.
```
const total = price * 0;
```
#12841 e954f55 Thanks @dyc3! - Added the nursery rule noNegatedArrayPredicate, which reports negated calls to Array#some() and Array#every() and suggests moving the negation into the callback function.
```
// Invalid: use `array.every((item) => !isUnicorn(item))` instead.
const isMissing = !array.some((item) => isUnicorn(item));
```
#12888 15039f7 Thanks @dyc3! - Added the new nursery rule noNumberArgumentOutOfRange, which reports number literal arguments of toString(), toFixed(), toExponential() and toPrecision() that are outside the range the method accepts. These calls throw a RangeError at runtime.
```
value.toString(64);
```
#12889 1cd7520 Thanks @dyc3! - Added the nursery rule noSharedBranchCode, which reports code that is repeated at the start or end of every branch of an if statement. That code runs no matter which branch is taken, so it can be moved before or after the if statement.
```
if (condition) {
  doSomething();
  cleanup();
} else {
  doSomethingElse();
  cleanup();
}
```
#12842 d47fcfd Thanks @dyc3! - Added the new nursery rule noSubtractionComparison, which reports subtracting two values only to compare the difference with 0, and suggests comparing the values directly.
```
if (a - b > 0) {}
```
#12866 7c1cd5f Thanks @dyc3! - Added the nursery rule noSvelteIgnoredUnsubscribe, which reports calls to a store's subscribe() method when the returned function is ignored. Without that function, the subscription can never be stopped, which causes a memory leak.
```
<script>
  import { count } from "./stores.js";

  count.subscribe((value) => console.log(value));
</script>
```
#12890 6b73fcf Thanks @dyc3! - Added the new nursery rule noUninvokedArrayCallback, which reports array methods such as map() and forEach() called with a callback on an array that only has empty slots. The callback never runs in this case.
```
const list = new Array(5).map(() => createElement());
```
#12886 3bb18d8 Thanks @dyc3! - Added the nursery rule useNextScriptForGoogleAnalytics, which reports <script> elements that load Google Analytics or Google Tag Manager. Use the GoogleAnalytics and GoogleTagManager components from @next/third-parties/google instead, which load these scripts after the page becomes interactive.
```
<script async src="https://www.googletagmanager.com/gtag/js?id=G-XYZ" />
```
The rule belongs to the next domain.
#12309 0538e30 Thanks @dyc3! - Added the new nursery rule usePackageJsonCpu, which reports package.json files that have no cpu field. The cpu field lists the processor types that the package supports.
The following package.json file satisfies the rule:
```
{
  "name": "my-package",
  "version": "1.0.0",
  "cpu": ["x64", "arm64"]
}
```
#12310 191111d Thanks @dyc3! - Added the nursery rule usePackageJsonEngines, which reports package.json files that have no engines field.
A package.json passes the rule once it declares the field:
```
{
  "name": "my-package",
  "engines": {
    "node": ">=20"
  }
}
```
#12986 cc929af Thanks @dyc3! - Fixed #12954, where configuring rules in groups with more than 256 rules could enable or disable the wrong rule.
#12931 fe9248e Thanks @dyc3! - Improved the performance of linting. Each lint pass now spends less time stepping over syntax nodes that no enabled rule looks at.
#12969 22d27e8 Thanks @vibbix! - Improved the performance of CSS linting. Rules that compare selectors, such as noDescendingSpecificity and noDuplicateSelectors, now make fewer memory allocations.
#12973 5a06df5 Thanks @vibbix! - Fixed useGenericFontNames reporting font-family inside @font-palette-values. There, font-family names the font families the palette applies to, so it doesn't take a generic family.
```
@font-palette-values --palette {
  font-family: Bixa;
  override-colors: 0 red;
}
```
#12930 ce71284 Thanks @dyc3! - Fixed #12073: useExhaustiveSwitchCases now reports non-exhaustive switches over values read from for...of loops over Array.prototype.entries(), Map, and Set, and over properties of array elements indexed by a number variable.
noMisusedPromises now also reports Promise-returning callbacks passed to array methods such as find and every.
#12983 2987b54 Thanks @ashokram-si! - Fixed #12957: Biome now correctly parses SCSS negative interpolation list items as separate values instead of an invalid subtraction operator.
```
-margin: -#{$s} - #{$s} - #{$s} auto;
+margin: -#{$s} -#{$s} -#{$s} auto;
```

What's Changed

test(cli): fix flaky symlink test by @dyc3 in #12929
fix(type_inference): remove lowering override for Array type by @dyc3 in #12930
perf(rowan): skip childless nodes and avoid segment copies in the kind-filtered walk by @dyc3 in #12931
chore: fix skill in Zed by @arendjr in #12949
refactor: extract JS extent detection into biome_js_extent by @ematipico in #12830
feat(markdown_parser): parse MDX ESM blocks and expressions by @ematipico in #12831
feat(markdown_parser): parse MDX JSX tags by @ematipico in #12832
docs: improve Biome description in README by @Netail in #12978
chore(deps): update dependency vite to v7.3.7 [security] by @renovate[bot] in #12491
fix(deps): update dependency happy-dom to v21 [security] by @renovate[bot] in #12641
chore(deps): update rust crate globset to 0.4.21 by @renovate[bot] in #12848
chore(deps): update rust crate jiff to 0.2.39 by @renovate[bot] in #12448
chore(deps): update rust crate schemars to 1.2.3 by @renovate[bot] in #12452
fix(lint/css): skip @font-palette-values in useGenericFontNames by @vibbix in #12973
chore(deps): update rust crate libc to 0.2.191 by @renovate[bot] in #12449
perf(css_semantic): store selector ranges and borrow resolved selectors by @vibbix in #12969
fix(css_parser): correctly parse SCSS negative interpolation list items by @ashokram-si in #12983
feat(lint): add noNegatedArrayPredicate by @dyc3 in #12841
feat(lint): add noSubtractionComparison by @dyc3 in #12842
feat(lint): add noSvelteIgnoredUnsubscribe by @dyc3 in #12866
feat(lint): add noErasingOperation by @dyc3 in #12876
feat(lint): add noConstantComparisons by @dyc3 in #12877
feat(lint): add useNextScriptForGoogleAnalytics by @dyc3 in #12886
feat(lint): add noArrayMethodsOnArguments by @dyc3 in #12887
feat(lint): add noNumberArgumentOutOfRange by @dyc3 in #12888
feat(lint): add noSharedBranchCode by @dyc3 in #12889
feat(lint): add noUninvokedArrayCallback by @dyc3 in #12890
feat(lint): add usePackageJsonCpu by @dyc3 in #12309
feat(lint): add usePackageJsonEngines by @dyc3 in #12310
chore: update rule metadata by @dyc3 in #12921
fix(configuration): avoid overflowing rule indices by @dyc3 in #12986
ci: release by @github-actions[bot] in #12938

New Contributors

@ashokram-si made their first contribution in #12983

Full Changelog: https://github.com/biomejs/biome/compare/@biomejs/biome@2.6.5...@biomejs/biome@2.6.6

biomejs/biome @biomejs/biome@2.6.6 Biome CLI v2.6.6 on GitHub

2.6.6

Patch Changes

What's Changed

New Contributors

biomejs/biome @biomejs/biome@2.6.6
Biome CLI v2.6.6

on GitHub