Version History

Version 2.5.9 Latest

Patch Changes

#11321 41386f3 Thanks @dyc3! - Fixed #11315: The CSS parser now recovers at declaration boundaries after bogus declarations, allowing subsequent valid declarations to be parsed.
#11248 57b197e Thanks @yanthomasdev! - Expanded the environment variable metadata used by biome rage to include BIOME_BINARY, BIOME_LOG_FILE, and RUST_BACKTRACE as well as reworded explanations for better readability.
#11377 a8798ea Thanks @Netail! - Added a new nursery rule useNamedLayer which disallows anonymous cascade layers.
```
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@layer {
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  a {
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    color: red;
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  }
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}
```
#11327 6771cf5 Thanks @dyc3! - The HTML formatter now preserves meaningful blank lines in HTML, including spacing after elements with trailing spaces and blank lines between comment groups.
```
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<div>
2
  
3

4
  
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</div>
```
#10312 ba8aa18 Thanks @dyc3! - Added the nursery rule useTailwindShorthandClasses, which suggests shorter Tailwind utility classes. For example, the rule suggests replacing w-4 h-4 with size-4.
#11333 715e0cd Thanks @kkkhs! - Fixed #11328: lint/nursery/useExpect now recognizes Vitest Browser Mode expect.element() calls as assertions.
#11343 9b98211 Thanks @johncarmack1984! - Fixed #11311: the CSS parser now accepts Tailwind container-query variant names in @variant, such as @xl and @max-xl. These previously produced a parse error and a noUnknownAtRules diagnostic.
```
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@variant @xl {
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  div {
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    background: red;
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  }
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}
```
#11220 3e8c488 Thanks @santichausis! - Fixed #9541: noUndeclaredVariables, noUnusedImports, and noUnusedVariables now correctly recognise exported variables and functions declared in one embedded <script> block as usable from a sibling <script> block, in Svelte’s <script module>/<script> pair and Vue’s non-setup <script> blocks.

For example, Biome no longer reports greet as undeclared in the following Svelte component:
```
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<script module>
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  export function greet() {
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    console.log("Hello!");
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  }
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</script>
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<script>
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  greet();
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</script>
```
#11300 36430eb Thanks @dyc3! - Fixed the HTML formatter’s whitespace handling for marquee, noscript, video, audio, and object elements.
```
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<marquee behavior="alternate"> This text will bounce </marquee>
2
<marquee behavior="alternate">This text will bounce</marquee>
```
#11299 6559e6c Thanks @jp-knj! - Added the nursery rule useAstroClientOnlyDirectiveValue, which reports Astro client:only directives without an initializer.

For example, <Component client:only /> triggers the rule.
#11365 7529811 Thanks @MHJahanbakhsh! - Fixed #11229: The useGenericFontNames rule now treats math as a valid generic font family.

#11346 674f5f4 Thanks @Jayllyz! - Fixed #11335: noComponentHookFactories now reports a use-prefixed variable only when a function is assigned to it directly.

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function factory() {
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  const useColors = true; // no longer reported
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  const useStore = createStore({ count: 0 }); // no longer reported
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  const useData = () => useState(null); // still reported
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  return useColors;
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}

#11334 c87c46a Thanks @zkasuran! - Fixed #11317: noSvgWithoutTitle no longer reports an svg that uses the boolean shorthand aria-hidden (equivalent to aria-hidden={true} in React).
#11364 13853b1 Thanks @ematipico! - Fixed a bug where useJsxKeyInIterable incorrectly flagged Astro files.
#11321 41386f3 Thanks @dyc3! - Fixed #11315: Invalid CSS declarations in HTML style attributes now produce parser diagnostics instead of causing a panic.
#11325 67c3bf0 Thanks @dyc3! - Fixed HTML text wrapping to account for the width of an adjacent closing tag, avoiding lines that exceed the configured width when the final word and tag must move together.
```
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<a-long-long-long-element
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  >foo bar foo bar foo bar foo bar foo bar foo bar foo bar</a-long-long-long-element
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  >foo bar foo bar foo bar foo bar foo bar foo
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  bar</a-long-long-long-element
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>
```
#11367 fe5b5d4 Thanks @ematipico! - Fixed TypeScript compilerOptions.paths resolution when mapping targets omit ./. Biome now resolves these targets relative to their configured path base.
#11316 17e48d6 Thanks @wanxiankai! - Fixed #11289: the safe fix for noExtraBooleanCast now preserves parentheses around nested conditional expressions.
#11254 d25d113 Thanks @dyc3! - Fixed #11242: Biome no longer crashes with an access violation when analysing files on Windows ARM64.
#11221 85aac73 Thanks @freeatnet! - Added the nursery rule noUnsafeTypeAssertion, which disallows TypeScript type assertions while allowing const assertions.
```
1
const value = input as SomeType;
```
#11314 7ffb677 Thanks @ematipico! - Fixed #11310: Restored the performance of noMisusedPromises and noFloatingPromises when analyzed expressions share deep imported type paths.
#11356 6cd3263 Thanks @johncarmack1984! - The Tailwind parser now understands modifiers on bare utilities (@container/sidebar, shadow/50).
#11318 76059e9 Thanks @johncarmack1984! - The Tailwind parser now understands container-query variants (@sm:, @max-lg:, @min-[400px]:) and child and descendant variants (*:, **:).
#11357 faa2074 Thanks @johncarmack1984! - The Tailwind parser now accepts the legacy leading ! important marker (!flex, hover:!p-4).
#11344 f34e15c Thanks @johncarmack1984! - The Tailwind parser now understands combinator selectors in arbitrary variants (has-[>svg]:, has-[+p]:), modifiers on variants (group-hover/menu:, @sm/main:), and arbitrary container-query sizes (@[400px]:).
#11324 2f5d452 Thanks @dyc3! - Fixed HTML formatting that inserted rendered whitespace between an element and touching text when the line wrapped.
```
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<div>
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  before<meter value=".5"></meter>
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  after
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  before<meter value=".5"></meter
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  >after
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</div>
```
#11312 e65f07e Thanks @xosnos! - Added a new nursery rule useControlLabel for both HTML and JSX, which reports interactive control elements (button, menuitem) without an accessible label.
```
1
<button />
```
#11364 13853b1 Thanks @ematipico! - Fixed SVG parsing for files with an XML declaration followed by a PUBLIC doctype, such as <?xml version="1.0"?><!DOCTYPE svg PUBLIC "a" "b">.

#11301 610ee28 Thanks @dyc3! - Fixed parent tag wrapping when an HTML element starts or ends with a block-like or hidden child such as source, track, or param.

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<video src="brave.webm"><track kind="subtitles" src="brave.en.vtt"></video>
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<video src="brave.webm">
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  <track kind="subtitles" src="brave.en.vtt">
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</video>