New JS rule: useBigintLiterals (
241b861)
Biome now flags BigInt() calls with literal arguments and suggests bigint literals like 1n or 0xFFn instead. This is a new nursery rule with autofix support and migration/configuration updates, so it expands lint coverage in a meaningful way.
New JS rule: noZeroFractions (241b861)
This rule disallows redundant numeric forms such as 1.0 and 1., simplifying them to shorter equivalents. It also ships with migration wiring and rule/schema registration, making it broadly usable in existing configs.
New Vue rule: noVueBooleanDefault (1a6fb41)
Biome added a Vue-specific nursery rule that forbids default values for Boolean props, since Vue already treats missing Boolean props as false. The same change also updates Vue prop detection so rules like noVueReservedProps can see props declared inside withDefaults().
noUnknownAttribute now accepts React 19 transition events (
dba2a37)
The JSX attribute checker now recognizes onTransitionCancel, onTransitionRun, onTransitionStart, and their capture variants when the React dependency range allows React 19 or later. That removes false positives for newer React apps without weakening the rule for older projects.
noDuplicateFontNames exempts monospace, monospace (
dd96b11)
The CSS linter now allows the specific font-family: monospace, monospace pattern because it preserves the inherited font size in browsers. This is a targeted bug fix that prevents a legitimate font stack from being flagged as a duplicate.
Svelte snippet formatting is less noisy (6e2ee70)
The formatter now keeps {#snippet} parameters on one line when they fit, instead of forcing unnecessary line breaks. This improves readability for small snippets while still wrapping long parameter lists appropriately.
Other misc changes
- Documentation/configuration rework for the linter/assist settings (
8cfb219) - Dependency/migration/schema updates for the new rules
- Minor test and snapshot additions across CSS, JS, Vue, and HTML formatters