.jshintrc

/**
 *  JSHint settings (for use anywhere that JSHint is supported)
 */
{
  /*
   * ENVIRONMENT OPTIONS
   * ===================
   */
  // define globals exposed by modern browsers.
  "browser": true,

  // define globals exposed by jQuery.
  "jquery": true,

  // define globals exposed by Node.js.
  "node": false,

  // add predefined variables specific to an application here
  "predef": [],

  // allow development statement usage (eg. console.log()) - don't forget to switch off for PROD linting
  "devel": true,

  /*
   * ENFORCEMENT OPTIONS
   * ===================
   */
  // require {} for every new block or scope
  "curly": true,

  // allow mixed whitespace only when used for alignment
  "smarttabs": true,

  // tolerate multi-line strings
  "multistr": false,

  // tolerate functions being defined in loops
  "loopfunc": false,

  // strictly prohibit use of == and != in favor of === and !==.
  "eqeqeq": true,

  // Suppress warnings about == null comparisons.
  "eqnull": true,

  // Enforce tab width of 4 spaces.
  "indent": 4,

  // Prohibit use of a variable before it is defined.
  "latedef": true,

  // Require capitalized names for constructor functions.
  "newcap": true,

  // Enforce use of single quotation marks for strings.
  "quotmark": "single",

  // Prohibit trailing whitespace.
  "trailing": true,

  // Prohibit use of explicitly undeclared variables.
  "undef": true,

  // Warn when variables are defined but never used.
  "unused": true
}