A method for recursively freezing nested objects, for use with vuex store

deepFreeze.js

function deepFreeze (object) {
    if (object) {
      // Retrieve the property names defined on object
      var propNames = Object.getOwnPropertyNames(object)

      // Freeze properties before freezing self
      for (let name of propNames) {
        let value = object[name]

        object[name] = value && typeof value === 'object' ? DataMigration.deepFreeze(value) : value
      }

      object = Object.freeze(object)
    }

    return object
  }