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tern-context-coloring

v1.0.1

Published

Tern plugin adding scope coloring

Downloads

4

Readme

tern-context-coloring Build Status

Use Tern as a back-end for context coloring.

Determines the lexical scope of functions and variables, and returns that information to a Tern editor plugin which can translate it into code coloring.

Emacs

This repository provides an Emacs plugin which collects scope data from Tern. It uses the Emacs plugin context-coloring to color buffers, which see.

Installation

Install the npm package globally:

npm i -g tern-context-coloring

Enable the plugin in ~/.tern-config (recommended) or in .tern-project:

{
  "plugins": {
    "context-coloring": {
      "charOffset": 1
    }
  }
}

("charOffset": 1 is for Emacs compatibility. Consult the documentation of your editor's context coloring plugin for the proper value of this option.)

Configure Melpa in Emacs and install the plugin: M-x package-install tern-context-coloring. Enable the Tern context coloring Emacs plugin:

(eval-after-load 'context-coloring
  '(tern-context-coloring-setup))

Also enable tern-mode and then context-coloring-mode when opening JavaScript files:

(add-hook 'js-mode-hook (lambda ()
                          (unless (eq major-mode 'json-mode)
                            (tern-mode)
                            (context-coloring-mode))))

Configuring

By default, only function scopes are recognized in the scope hierarchy. Use "blockScope": true to also recognize blocks (i.e. let and const scopes).

Tern usually treats all files as scripts, and thus top-level variables and global variables are colored the same (as they share the same scope). If the Tern modules plugin is enabled (e.g. via the es_modules or node plugin), then top-level variables will be colored indicating they are local to the module.