115 lines
5.4 KiB
Markdown
115 lines
5.4 KiB
Markdown
# JavaScript contribution layer for Spacemacs
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<!-- markdown-toc start - Don't edit this section. Run M-x markdown-toc/generate-toc again -->
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**Table of Contents**
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- [JavaScript contribution layer for Spacemacs](#javascript-contribution-layer-for-spacemacs)
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- [Description](#description)
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- [Install](#install)
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- [Key Bindings](#key-bindings)
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- [js2-mode](#js2-mode)
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- [Folding (js2-mode)](#folding-js2-mode)
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- [Refactoring (js2-refactor)](#refactoring-js2-refactor)
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- [Auto-complete and documentation (tern)](#auto-complete-and-documentation-tern)
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<!-- markdown-toc end -->
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## Description
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This layer adds support for the JavaScript language using [js2-mode][].
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Main features:
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- Smart code folding
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- Refactoring: done using [js2-refactor][].
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- Auto-completion and documentation: provided by [tern][]
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- CoffeeScript support
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## Install
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To use this contribution add it to your `~/.spacemacs`
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```elisp
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(setq-default dotspacemacs-configuration-layers '(javascript)
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"List of contribution to load."
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)
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```
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You will also need to install `tern` to use the auto-completion and
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documentation features:
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```shell
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$ npm install -g tern
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```
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## Key Bindings
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### js2-mode
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Key Binding | Description
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--------------------|------------------------------------------------------------
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<kbd>SPC m w</kbd> | toggle js2-mode warnings and errors
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### Folding (js2-mode)
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Key Binding | Description
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----------------------|------------------------------------------------------------
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<kbd>SPC m z c</kbd> | hide element
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<kbd>SPC m z o</kbd> | show element
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<kbd>SPC m z r</kbd> | show all element
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<kbd>SPC m z e</kbd> | toggle hide/show element
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<kbd>SPC m z F</kbd> | toggle hide functions
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<kbd>SPC m z C</kbd> | toggle hide comments
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### Refactoring (js2-refactor)
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Bindings should match the plain emacs assignments.
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Key Binding | Description
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------------------------|------------------------------------------------------------
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<kbd>SPC x m j</kbd> | move line down, while keeping commas correctly placed
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<kbd>SPC x m k</kbd> | move line up, while keeping commas correctly placed
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<kbd>SPC m k</kbd> | deletes to the end of the line, but does not cross semantic boundaries
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<kbd>SPC m r 3 i</kbd> | converts ternary operator to if-statement
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<kbd>SPC m r a g</kbd> | creates a `/* global */` annotation if it is missing, and adds var to point to it
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<kbd>SPC m r a o</kbd> | replaces arguments to a function call with an object literal of named arguments
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<kbd>SPC m r b a</kbd> | moves the last child out of current function, if-statement, for-loop or while-loop
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<kbd>SPC m r c a</kbd> | converts a multiline array to one line
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<kbd>SPC m r c o</kbd> | converts a multiline object literal to one line
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<kbd>SPC m r c u</kbd> | converts a multiline function to one line (expecting semicolons as statement delimiters)
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<kbd>SPC m r e a</kbd> | converts a one line array to multiline
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<kbd>SPC m r e f</kbd> | extracts the marked expressions into a new named function
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<kbd>SPC m r e m</kbd> | extracts the marked expressions out into a new method in an object literal
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<kbd>SPC m r e o</kbd> | converts a one line object literal to multiline
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<kbd>SPC m r e u</kbd> | converts a one line function to multiline (expecting semicolons as statement delimiters)
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<kbd>SPC m r e v</kbd> | takes a marked expression and replaces it with a var
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<kbd>SPC m r i g</kbd> | creates a shortcut for a marked global by injecting it in the wrapping immediately invoked function expression
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<kbd>SPC m r i p</kbd> | changes the marked expression to a parameter in a local function
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<kbd>SPC m r i v</kbd> | replaces all instances of a variable with its initial value
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<kbd>SPC m r l p</kbd> | changes a parameter to a local var in a local function
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<kbd>SPC m r l t</kbd> | adds a console.log statement for what is at point (or region)
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<kbd>SPC m r r v</kbd> | renames the variable on point and all occurrences in its lexical scope
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<kbd>SPC m r s l</kbd> | moves the next statement into current function, if-statement, for-loop, while-loop
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<kbd>SPC m r s s</kbd> | splits a `String`
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<kbd>SPC m r s v</kbd> | splits a `var` with multiple vars declared into several `var` statements
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<kbd>SPC m r t f</kbd> | toggle between function declaration and function expression
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<kbd>SPC m r u w</kbd> | replaces the parent statement with the selected region
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<kbd>SPC m r v t</kbd> | changes local `var a` to be `this.a` instead
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<kbd>SPC m r w i</kbd> | wraps the entire buffer in an immediately invoked function expression
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<kbd>SPC m r w l</kbd> | wraps the region in a for-loop
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### Auto-complete and documentation (tern)
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Key Binding | Description
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<kbd>SPC m c</kbd> | rename variable under the cursor using tern
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<kbd>SPC m d</kbd> | find docs of the thing under the cursor. Press again to open the associated URL (if any)
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<kbd>SPC m g</kbd> | jump to the definition of the thing under the cursor
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<kbd>SPC m G</kbd> | jump to definition for the given name
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<kbd>SPC m C-g</kbd> | brings you back to last place you were when you pressed M-..
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<kbd>SPC m t</kbd> | find the type of the thing under the cursor
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[js2-mode]: https://github.com/mooz/js2-mode
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[js2-refactor]: https://github.com/magnars/js2-refactor.el
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[tern]: http://ternjs.net/
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