已經實現了

cancel(e) {
      let element = e.currentTarget;      if (element.classList.contains('active')) {
        element.classList.toggle('active');
      }
    },    toggle(e) {
      let element = e.currentTarget;      if (!element.classList.contains('active')) {
        element.classList.toggle('active');
      }
    }

html代碼

<button v-for = "item in months16"
                      @dblclick.prevent="cancel($event)"
                      @click.prevent="toggle($event)"
              >{{item}}</button>