Function normalizeValue

src/directive/ngModel.js:225–227

* Casting all null-like values to actual null for guaranteed comparison. * * @param {*} value * * @returns {*}

(value)

   * @returns {*}
   */
  function normalizeValue (value) {
    return (undefined === value || '' === value ? null : value);
  }

})(window, angular);