JavaScript code intelligence for atom with Tern. Adds support for ES5, ES6 (JavaScript 2015), Node.js, jQuery, Angular and more. Extendable via plugins. Uses suggestion provider by autocomplete-plus.

Configure your project

• Navigate to Packages -> Atom Ternjs -> Configure project
• The config view appears.
• Hit "Save & Restart Server" to create/update the .tern-project file

Configure project doesn't support the plugins-section (yet). Please add plugins manually by editing the .tern-project file as shown below.

In order to use third party plugins read the Third party plugins section!

In order to use third party plugins from within your project's node_modules read the Third party plugins local section! This is also an alternative if Third party plugins aren't working.

If configure project does not work for you

• In your project root create a file named .tern-project. See docs @ http://ternjs.net/doc/manual.html#configuration.
• Check path in loadEagerly
• Restart the server via Packages -> Atom Ternjs -> Restart server

Example .tern-project file (customize to your own needs):

{
  "ecmaVersion": 6,
  "libs": [
    "browser",
    "jquery"
  ],
  "loadEagerly": [
    "path/to/your/js/**/*.js"
  ],
  "dontLoad": [
    "path/to/your/js/**/*.js"
  ],
  "plugins": {
    "complete_strings": {},
    "node": {},
    "lint": {},
    "angular": {},
    "requirejs": {},
    "modules": {},
    "es_modules": {},
    "doc_comment": {
      "fullDocs": true
    }
  }
}

• 5: use ECMAScript5
• 6: use ECMAScript6 (default)

• browser: completion for vanilla js (optional)
• jquery: completion for jQuery (optional)

• loadEagerly: provide the path to your projects js. For relative paths do not use ./ as a prefix. This sometimes leads to an unexpected behaviour.
• loadEagerly is expensive. Do not add paths like node_modules.
• dontLoad: can be used to prevent Tern from loading certain files. It also takes an array of file names or glob patterns.

• complete_strings: When enabled, this plugin will gather (short) strings in your code, and completing when inside a string will try to complete to previously seen strings. Takes a single option, maxLength, which controls the maximum length of string values to gather, and defaults to 15. (optional)
• doc_comment: tern will look for JSDoc-style type declarations. Returns the full comment text instead of the first sentence. (optional)
• node: NodeJS (optional)
• lint: angelozerr/tern-lint is a tern plugin which is able to validate JavaScript files to collect semantic errors. Linter is used to display these errors and warnings (optional)
• angular: AngularJS (optional)
• requirejs: RequireJS (optional, understand RequireJS-style dependency management)
• modules: This is a supporting plugin to act as a dependency for other module-loading and module-resolving plugins. (optional, required by es_modules)
• es_modules: Builds on top of the modules plugin to support ECMAScript 6’s import and export based module inclusion. (optional, requires modules)
• For a list of possible plugins goto http://ternjs.net/doc/manual.html#plugins

In order to use third party plugins (e.g. tern-node-express):

$ cd ~/.atom/packages/atom-ternjs
$ npm install tern-node-express

Add the plugin to your .tern-project file:

{
  "ecmaVersion": 6,
  "libs": [
    "browser"
  ],
  "loadEagerly": [
    "app/**/*.js"
  ],
  "plugins": {
    "node-express": {}
  }
}

Third party plugins are still an issue and sometimes do not work as expected. This will be fixed in future release. Restart the server: Packages -> Atom Ternjs -> Restart server

• After the file was created or has been modified, restart the server via Packages -> Atom Ternjs -> Restart server

• Completion (autocompletion triggers automatically), or via the keybindings:
  • strg+space
  • ctrl+alt+space (force autocompletion in any context)

• Find references (set your cursor position to one of variable, function or instance -> open context-menu and trigger "Find references" or use the keybindings:
  • ctrl+shift+r (mac, windows)
  • ctrl+alt+shift+e (linux)

Click any item in the generated reference-list and navigate directly to file and position

• Documentation

  • Show documentation for the thing under the cursor via alt+o (mac, windows, linux)
  • Also displayed if a suggestion with a valid documentation is selected in the autocomplete-plus select-list

• Find definition (set your cursor position to one of variable, function or instance -> open context-menu and trigger "Find definition") or use the keybindings:

  • alt+click (mac, windows, linux)
  • ctrl+alt+d (mac, windows)
  • ctrl+alt+shift+d (linux)

• Back from definition

  • ctrl+alt+z (mac, windows)
  • ctrl+alt+shift+z (linux)

• Rename variable (set your cursor position to a variable -> open context-menu and trigger "Rename") or use the keybindings:

  • ctrl+alt+c (mac, windows)
  • ctrl+alt+shift+c (linux)