var app = vue({
el: '#app',
data: {
  message: ' Ravialdo!'
},
methods: {
  toUpper(){
    this.message =this.message.toUpperCase()
  },
  toLower(){
    this.message =this.message.toLowerCase()
  },
  changeMessage(text){
    this.message =text.target.value;
  }
 }
})