Prettier

Prettier is an opinionated code formatter that supports JavaScript, TypeScript, CSS, HTML, GraphQL, Markdown, and more. Current stable version is 3.x (npm package name 'prettier', not 'prettier-resolver'). Prettier is actively maintained with frequent releases. It differs from other formatters by being opinionated (few options), rewriting entire AST, and integrating into editors, pre-commit hooks, and CI. Available as CLI and API; ships as ESM-only since v3, requires Node >=18.