I found that for linting purposes. This article provides an overview of Biomejs and usage in t3-env.

Biome.js

Biome.js is a toolchain for your web project. It helps with formatting and linting your project.

Quick start

1. Installation
   

npm install - save-dev - save-exact @biomejs/biome

2. Configuration

npx @biomejs/biome init

When you run the above command, it automatically creates biome.json file. Below is the code generated by default when you run


the above command in biome.json.

{

 "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",

 "vcs": {

 "enabled": false,

 "clientKind": "git",

 "useIgnoreFile": false

 },

 "files": { "ignoreUnknown": false, "ignore": [] },

 "formatter": { "enabled": true, "indentStyle": "tab" },

 "organizeImports": { "enabled": true },

 "linter": {

 "enabled": true,

 "rules": { "recommended": true }

 },

 "javascript": { "formatter": { "quoteStyle": "double" } }

}

The linter.enabled: true enables the linter and rules.recommended: true enables the recommended rules. This corresponds to the default settings.

Formatting is enabled by default, but you can disable it by explicitly using formatter.enabled: false.

3. Biome commands

a. format

You can format files and directories using the format command with the — write option:

npx @biomejs/biome format - write <files>

b. lint

You can lint and apply safe fixes to files and directories using the lint command with the — write option:

npx @biomejs/biome lint - write <files>

c. check

You can run both, format and link, by leveraging the check command:

npx @biomejs/biome check - write <files>

Biome.js usage in t3-env

1. Scripts in package.json
   

"lint": "biome check .",

"lint:fix": "biome check . - apply",

This is found to be using the check CLI command that applies formatting and linting. There’s a variation though, lint only checks the linting issues but when you do lint:fix, it is executed with — apply.

— apply — Alias for — write, writes safe fixes, formatting and import sorting (deprecated, use — write)

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