event vueks

new Vue({
  el: '#example-3',
  methods: {
    say: function (message) {
      alert(message)
    }
  }
})

<div id="example-3">
  <button v-on:click="say('salut')">Dire salut</button>
  <button v-on:click="say('quoi')">Dire quoi</button>
</div>