@biomejs/biome
Advanced tools
Biome is a performant toolchain for web projects, it aims to provide developer tools to maintain the health of said projects.
Biome is a fast formatter for JavaScript, TypeScript, JSX, JSON, CSS and GraphQL that scores 97% compatibility with Prettier.
Biome is a performant linter for JavaScript, TypeScript, JSX, CSS and GraphQL that features more than 270 rules from ESLint, typescript-eslint, and other sources. It outputs detailed and contextualized diagnostics that help you to improve your code and become a better programmer!
Biome is designed from the start to be used interactively within an editor. It can format and lint malformed code as you are writing it.
npm install --save-dev --save-exact @biomejs/biome
# format files
npx @biomejs/biome format --write ./src
# lint files and apply the safe fixes
npx @biomejs/biome lint --write ./src
# run format, lint, etc. and apply the safe fixes
npx @biomejs/biome check --write ./src
# check all files against format, lint, etc. in CI environments
npx @biomejs/biome ci ./src
If you want to give Biome a run without installing it, use the online playground, compiled to WebAssembly.
Check out our homepage to learn more about Biome, or directly head to the Getting Started guide to start using Biome.
Biome has sane defaults and it doesn't require configuration.
Biome aims to support all main languages of modern web development.
Biome doesn't require Node.js to function.
Biome has first-class LSP support, with a sophisticated parser that represents the source text in full fidelity and top-notch error recovery.
Biome unifies functionality that has previously been separate tools. Building upon a shared base allows us to provide a cohesive experience for processing code, displaying errors, parallelize work, caching, and configuration.
Read more about our project philosophy.
Biome is MIT licensed or Apache 2.0 licensed and moderated under the Contributor Covenant Code of Conduct.
You can fund the project in different ways
You can sponsor or fund the project via Open collective or GitHub sponsors
Biome offers a simple sponsorship program that allows companies to get visibility and recognition among various developers.
We use Polar.sh to up-vote and promote specific features that you would like to see and implement. Check our backlog and help us:
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v1.9.4 (2024-10-17)
Implement GraphQL suppression action. Contributed by @vohoanglong0107
Improved the message for unused suppression comments. Contributed by @dyc3
Fix #4228, where the rule a11y/noInteractiveElementToNoninteractiveRole incorrectly reports a role for non-interactive elements. Contributed by @eryue0220
noSuspiciousSemicolonInJsx now catches suspicious semicolons in React fragments. Contributed by @vasucp1207
The syntax rule noTypeOnlyImportAttributes now ignores .cts files (#4361).
Since TypeScript 5.3, type-only imports can be associated to an import attribute in CommonJS-enabled files. See the TypeScript docs.
The following code is no longer reported as a syntax error:
import type { TypeFromRequire } from "pkg" with {
"resolution-mode": "require"
};
Note that this is only allowed in files ending with the cts extension.
Contributed by @Conaclos
The --summary reporter now reports parsing diagnostics too. Contributed by @ematipico
Improved performance of GritQL queries by roughly 25-30%. Contributed by @arendjr
@charset dobule quote under any situation for css syntax rule. Contributed by @fireairforceBiome no longer crashes when it encounters a string that contain a multibyte character (#4181).
This fixes a regression introduced in Biome 1.9.3 The regression affected the following linter rules:
nursery/useSortedClassesnursery/useTrimStartEndstyle/useTemplatesuspicious/noMisleadingCharacterClassContributed by @Conaclos
Fix #4190, where the rule noMissingVarFunction wrongly reported a variable as missing when used inside a var() function that was a newline. Contributed by @ematipico
Fix #4041. Now the rule useSortedClasses won't be triggered if className is composed only by inlined variables. Contributed by @ematipico
useImportType and useExportType now report useless inline type qualifiers (#4178).
The following fix is now proposed:
- import type { type A, B } from "";
+ import type { A, B } from "";
- export type { type C, D };
+ export type { C, D };
Contributed by @Conaclos
useExportType now reports ungrouped export from.
The following fix is now proposed:
- export { type A, type B } from "";
+ export type { A, B } from "";
Contributed by @Conaclos
noVoidTypeReturn now accepts void expressions in return position (#4173).
The following code is now accepted:
function f(): void {
return void 0;
}
Contributed by @Conaclos
noUselessFragments now correctly handles fragments containing HTML escapes (e.g. ) inside expression escapes { ... } (#4059).
The following code is no longer reported:
function Component() {
return (
<div key={index}>{line || <> </>}</div>
)
}
Contributed by @fireairforce
noUnusedFunctionParameters and noUnusedVariables no longer reports a parameter as unused when another parameter has a constructor type with the same parameter name (#4227).
In the following code, the name parameter is no longer reported as unused.
export class Foo {
bar(name: string, _class: new (name: string) => any) {
return name
}
}
Contributed by @Conaclos
noUndeclaredDependencies now accepts dependency names with dots. Contributed by @Conaclos
useFilenamingConvention now correctly handles renamed exports (#4254).
The rule allows the filename to be named as one of the exports of the module.
For instance, the file containing the following export can be named Button.
class Button {}
export { Button }
The rule now correctly handles the renaming of an export.
For example, the file containing the following export can only be named Button.
Previously the rule expected the file to be named A.
class A {}
export { A as Button }
Contributed by @Conaclos
useConsistentMemberAccessibility now ignore private class members such as #property (#4276). Contributed by @Conaclos
noUnknownFunction correctly handles calc-size function (#4212).
The following code calc-size is no longer reported as unknown:
.a { height: calc-size(0px); }
Contributed by @fireairforce
useNamingConvention now allows configuring conventions for readonly index signatures.
Contributed by @sepruko
The CSS parser now accepts more emoji in identifiers (#3627).
Browsers accept more emoji than the standard allows. Biome now accepts these additional emojis.
The following code is now correctly parsed:
p {
--✨-color: red;
color: var(--✨-color);
}
Contributed by @Conaclos
Add support for parsing typescript's resolution-mode in Import Types(#2115)
export type Fs = typeof import('fs', { with: { 'resolution-mode': 'import' } });
export type TypeFromRequire =
import("pkg", { with: { "resolution-mode": "require" } }).TypeFromRequire;
export type TypeFromImport =
import("pkg", { with: { "resolution-mode": "import" } }).TypeFromImport;
Contributed by @fireairforce
FAQs
Biome is a toolchain for the web: formatter, linter and more
The npm package @biomejs/biome receives a total of 883,776 weekly downloads. As such, @biomejs/biome popularity was classified as popular.
We found that @biomejs/biome demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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