prettier

Prettier is an opinionated code formatter that enforces a consistent code style across your entire codebase by parsing and re-printing code with its own rules. Unlike linters that warn about style issues, Prettier automatically reformats code, eliminating all style-related discussions in code reviews. Prettier supports JavaScript, TypeScript, JSX, TSX, CSS, SCSS, Less, HTML, JSON, GraphQL, Markdown, YAML, and more through its built-in parsers and community plugins. The tool deliberately offers few configuration options — print width, tab width, tabs vs spaces, semicolons, quotes, trailing commas, bracket spacing, and a few others — enforcing a consistent style that most teams can agree on without debate. Prettier integrates with all major editors through extensions that format on save, and with CI pipelines through the --check flag that verifies formatting without modifying files. Prettier works alongside ESLint using eslint-config-prettier to disable ESLint style rules that conflict with Prettier's formatting. The tool has become essentially universal in the JavaScript ecosystem, with most popular open-source projects and companies adopting it as their standard formatter.