.prettierrc.js

// https://prettier.io/
// http://json.schemastore.org/prettierrc
// https://github.com/prettier/prettier-atom
// https://prettier.io/docs/en/configuration.html
// https://github.com/obartra/prettierrc/blob/master/example/.prettierrc
module.exports = {
  "eslintIntegration": true,
  "bracketSpacing": true,
  "useTabs": false, // Indent lines with tabs instead of spaces.
  "printWidth": 80, // Specify the length of line that the printer will wrap on.
  "tabWidth": 2,    // Specify the number of spaces per indentation-level.
  "singleQuote": true, // Use single quotes instead of double quotes.
  /**
   * Print trailing commas wherever possible.
   * Valid options:
   *   - "none" - no trailing commas
   *   - "es5" - trailing commas where valid in ES5 (objects, arrays, etc)
   *   - "all" - trailing commas wherever possible (function arguments)
   */
  // "trailingComma": "none",
  "trailingComma": "es5",

  /**
   * Do not print spaces between brackets.
   * If true, puts the > of a multi-line jsx element at the end of the last line instead of being
   * alone on the next line
   */
  "jsxBracketSameLine": false,
  /**
   * Specify which parse to use.
   * Valid options:
   *   - "flow"
   *   - "babylon"
   */
  "parser": "babylon",
  /**
   * Do not print semicolons, except at the beginning of lines which may need them.
   * Valid options:
   * - true - add a semicolon at the end of every line
   * - false - only add semicolons at the beginning of lines that may introduce ASI failures
   */
  "noSemi": true,
  "semi": true,
  /**
   * Add additional logging from prettierrc (not prettier itself).
   * Defaults to false
   * Valid options:
   * - true - enable additional logging
   * - false - disable additional logging
   */
  "rcVerbose": true,

  // All files specified will be figured using the override values
  "overrides": [
    {
      "files": ["**/app/**/*", "**/spec/**/*"],
      "options": {
        "trailingComma": "all"
      }
    }
  ]
};