Version History

Version 2.5.8 Latest

Patch Changes

#10710 0a0fbc1 Thanks @dyc3! - Added a new nursery rule useReactCompiler, which reports diagnostics from React Compiler lint mode.
#11251 ea9dd8a Thanks @dyc3! - Improved performance of noImportCycles.

#11247 52b44d6 Thanks @dyc3! - Added the nursery rule noSvelteLegacyConst, which disallows legacy Svelte {@const} tags and recommends declaration tags with $derived().

Invalid:

1
{#each boxes as box}
2
  {@const area = box.width * box.height}
3
  <p>{area}</p>
4
{/each}

Valid:

1
{#each boxes as box}
2
  {const area = $derived(box.width * box.height)}
3
  <p>{area}</p>
4
{/each}

#11252 d5f5704 Thanks @Turtle-Hwan! - Fixed #11250: useAwait no longer reports async functions that contain an await using declaration.
#11143 6be7be1 Thanks @vznh! - Fixed #11017: noUselessUndefined no longer reports return undefined when the enclosing function has a return type annotation other than undefined or void.
#11234 caefe39 Thanks @subotac! - Fixed #11228: CSS block comments between a declaration colon and value now preserve their source indentation.
```
1
:root {
2
  --font-stack:
3
/* comment */
4
    /* comment */
5
    system-ui;
6
}
```
#11285 bca1f73 Thanks @denbezrukov! - Fixed #11280: CSS formatting keeps comments inside functional pseudo-classes and pseudo-elements instead of moving them before the function name.
```
1
:/* comment */ where(div) {}
2
:where(/* comment */ div) {}
```
#11080 af16a0b Thanks @dyc3! - HTML style attribute values are now parsed as CSS. All Biome CSS lint rules are applied to the style attributes.
#11195 6a85588 Thanks @dyc3! - Fixed Svelte files failing to parse when an expression begins with an object literal.

Now the following snippet is correctly parsed:
```
1
<p>{{ a: true }}</p>
2
<div class={{ active: isActive }}></div>
```
#11173 481d008 Thanks @Austin1serb! - Fixed #10242: JavaScript GritQL patterns with multiple metavariables now match snippets consistently in WebAssembly.
#11187 23c0369 Thanks @ematipico! - Added the nursery rule noInvalidPropertyInitValue, which reports an @property whose initial-value does not match its syntax descriptor. For example, the following declaration triggers the rule because red is not a <length>:
```
1
@property --size {
2
  syntax: "<length>";
3
  inherits: false;
4
  initial-value: red;
5
}
```
#11272 73896e6 Thanks @ematipico! - Improved the diagnostic emitted by noRootType.
#11240 bd0b68d Thanks @ematipico! - Fixed #11223: Improved the performance of noMisusedPromises when analyzing async class methods that call other methods through this.
#11172 4a0bc5c Thanks @saberoueslati! - Fixed #10806: noUselessFragments no longer causes Biome to panic when its unsafe fix removes a fragment used as a JSX attribute value.
#11227 4d603b0 Thanks @saberoueslati! - Fixed #11178: noUndeclaredVariables no longer reports Vue’s built-in instance properties, such as $slots and $attrs, in template expressions or $event in inline event-handler expressions. The instance properties are still reported inside <script setup>, where they are not defined.
#11187 23c0369 Thanks @ematipico! - Fixed CSS parsing of registered custom properties: Biome now correctly validates the syntax descriptor of @property rules.