computed as watcher vue code example

Example 1: computed vue

// ...
computed: {
  fullName: {
    // getter
    get: function () {
      return this.firstName + ' ' + this.lastName
    },
    // setter
    set: function (newValue) {
      var names = newValue.split(' ')
      this.firstName = names[0]
      this.lastName = names[names.length - 1]
    }
  }
}
// ...

Example 2: vue watch

// in component
methods: {
  reverseMessage: function () {
    return this.message.split('').reverse().join('')
  }
}