elm-format vs Prettier
elm-format
github.com
Prettier
prettier.ioSide by side
| Figure | elm-format | Prettier |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | Yes |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 2 |
| Spec score · Code formatters | 7.8 (#5) | 8.5 (#2) |
| Spec score · Code Formatting Tools | 7.9 (#11) | 8.5 (#2) |
| Command line | The command line can format a single Elm file or all Elm files in a directory, and can overwrite files with the --yes option. | The install guide documents running `prettier --write` to rewrite files and `prettier --check` in CI to detect unformatted files. |
| Editor integrations | The README lists integrations for Atom, Light Table, Vim, Emacs, Visual Studio Code, Sublime Text, JetBrains IDEs, and TextMate. | The official site lists integrations or support for VS Code, WebStorm, Visual Studio, Vim, Emacs, Sublime Text, Nova and Espresso. |
Plans
In their own words
Prettier
Prettier is an open-source code formatter that parses source files and prints them in a consistent style while accounting for line length. Its built-in languages include JavaScript, JSX, Angular, Vue, Flow, TypeScript, CSS, Less, SCSS, HTML, JSON, GraphQL, Markdown, YAML, LWC, and MJML. The command-line interface can write formatted files with --write or check formatting with --check in continuous integration. Listed editor integrations include VS Code, Emacs, Vim, Helix, Sublime Text, JetBrains IDEs, Visual Studio, and Espresso; formatting can run from a shortcut or on save. Prettier has configuration options but keeps them limited. Plugins can add languages and formatting rules, and languages outside the built-in set require a plugin. For ESLint integration, the installation guidance recommends eslint-config-prettier to disable rules that are unnecessary or may conflict. Prettier supports browser and JavaScript API use, along with Linux, macOS, and Windows. The listed plan is free. Commercial support and maintenance are available through the Tidelift Subscription.