React layer

ES6 and JSX ready configuration layer for React It will automatically recognize .jsx files and files with react imported.

To use this configuration layer, add it to your ~/.spacemacs. You will need to add react to the existing dotspacemacs-configuration-layers list in this file.

React layer uses the same backend defined in javascript layer. Options are tern and lsp.

React layer also uses the same import backend defined in javascript layer.

To use the on-the-fly syntax checking, install eslint with babel and react support:

$ npm install -g eslint babel-eslint eslint-plugin-react

If your project do not use a custom .eslintrc file I strongly advice you to try out this one by Airbnb: .eslintrc

When lsp is set as the backend, but you don't want to use lsp as the linter, set the variable javascript-lsp-linter to nil in the Javascript layer.

React layer uses the same formatter defined in javascript layer. Options are web-beautify and prettier. To use automatic code formatting you need to install js-beautify or prettier with:

$ npm install -g js-beautify prettier

If you install these in non-standard locations, then add the following to your dotspacemacs/user-init function:

(add-to-list 'exec-path "/path/to/node/bins" t)

Be sure to have the e4x option set to true on your .jsbeautifyrc here it is my configuration as an example:

{
  "indent_size": 2,
  "indent_char": " ",
  "eol": "\n",
  "indent_level": 0,
  "indent_with_tabs": false,
  "preserve_newlines": true,
  "max_preserve_newlines": 2,
  "jslint_happy": false,
  "space_after_anon_function": false,
  "brace_style": "collapse",
  "keep_array_indentation": false,
  "keep_function_indentation": false,
  "space_before_conditional": true,
  "break_chained_methods": true,
  "eval_code": false,
  "unescape_strings": false,
  "wrap_line_length": 80,
  "wrap_attributes": "auto",
  "wrap_attributes_indent_size": 2,
  "e4x": true,
  "end_with_newline": true,
  "brace_style": "collapse-preserve-inline"
}

You may refer to the web-mode configuration for fine tuning the indenting behaviour.

For example to have a consistent 2 spaces indenting both on js and jsx you may use these settings:

(setq-default
 ;; js2-mode
 js2-basic-offset 2
 ;; web-mode
 css-indent-offset 2
 web-mode-markup-indent-offset 2
 web-mode-css-indent-offset 2
 web-mode-code-indent-offset 2
 web-mode-attr-indent-offset 2)

And if you want to have 2 space indent also for element's attributes, concatenations and contiguous function calls:

(with-eval-after-load 'web-mode
  (add-to-list 'web-mode-indentation-params '("lineup-args" . nil))
  (add-to-list 'web-mode-indentation-params '("lineup-concats" . nil))
  (add-to-list 'web-mode-indentation-params '("lineup-calls" . nil)))