nextjournal / clojure-mode

Clojure/Script mode for CodeMirror 6

Clojure/Script mode for CodeMirror 6

Enabling a decent Clojure/Script editor experience in the browser. Built for and by Nextjournal.

• 🤹‍♀️ Live demo with in-browser eval
• 🐢 Try it in Nextjournal
• 📦 Use it in your project

✨ Features

⚡️ Lightning-fast thanks to lezer incremental parsing

• Try pasting clojure/core.clj into the live demo.

🥤 Slurping & 🤮 Barfing

• Forward: Ctrl + ← / → or Mod + ⇧ + J / K
• Backward: Ctrl + Alt + ← / →

💗 Semantic Selections

• Expand/Contract: Alt + ↑ / ↓ or Mod + 1 / 2

🧙 Prepared for evaluation

• At Cursor: Mod + ⏎
• Top-level form: Mod + ⇧ + ⏎
• Cell: Alt + ⏎

🧹 Autoformatting following Tonsky’s Better Clojure Formatting

🎹 And lots of more useful key bindings

📦 Use it in your project

Include it in your deps.edn

{:deps {io.github.nextjournal/clojure-mode {:git/sha "<SHA>"}}}

Use it from NPM

import { default_extensions, complete_keymap } from '@nextjournal/clojure-mode';
import { EditorView, drawSelection, keymap } from  '@codemirror/view';
import { EditorState } from  '@codemirror/state';

let extensions = [keymap.of(complete_keymap),
                  ...default_extensions
                 ];

let state = EditorState.create({doc: "... some clojure code...",
                                 extensions: extensions });
let editorElt = document.querySelector('#editor');
let editor = new EditorView({state: state,
                             parent: editorElt,
                             extensions: extensions });

🛠 Development Setup

• Install JS dependencies: yarn install
• Start dev server: yarn watch
• Open the demo page at http://localhost:8002/

⚖️ License

Licensed under the EPL License, Copyright © 2020-present Nextjournal GmbH.

See LICENSE for more information.