Js2-mode
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| Description | major mode for JavaScript programming |
|---|---|
| Author | Steve Yegge |
| Maintainer | FSF |
| Source | http://bzr.savannah.gnu.org/lh/emacs/elpa/annotate/head:/packages/js2-mode/js2-mode.el |
| Part of Emacs | no |
js2-mode provides Emacs font-lock, indentation, and navigation for the JavaScript programming language. It also features an advanced JavaScript parser.
The original repository (at Google Code) seems to be outdated and https://github.com/mooz/js2-mode#readme seems to be a maintained fork. It includes several changes.
Basic setup
(package-install "js2-mode")
(require 'js2-mode)
Features
- accurate syntax highlighting using a recursive-descent parser
- on-the-fly reporting of syntax errors and strict-mode warnings
- undeclared-variable warnings using a configurable externs framework
- "bouncing" line indentation to choose among alternate indentation points
- smart line-wrapping within comments and strings
- code folding:
- show some or all function bodies as {...}
- show some or all block comments as /*...*/
- context-sensitive menu bar and popup menus
- code browsing using the Imenu package
- many customization options
- strict recognition of the Ecma-262 language standard
- support for most Rhino and SpiderMonkey extensions from 1.5 and up
- parsing support for ECMAScript for XML (E4X, ECMA-357)
Common Customization
See Also
- js2-refactor - A refactoring library based on js2-mode.
- Swank-js (homepage) - A REPL to interact with the browser.