Evgeny Kulakov

computed: {
  styleObject: function() {
   return {
     background: `url(${this.photos[this.currentSlide]})`
   }
  }
}

<a v-on:click="click_page" href="javascript:void(0)">{{page.page}}</a>

<a v-on:click="click_page(arguments[0])" href="javascript:void(0)">{{page.page}}</a>

<a v-on:click="click_page($event)" href="javascript:void(0)">{{page.page}}</a>

props: {
    age: {
      type: Number,
      default: 0,
      required: true,
      validator: function (value) {
        return value >= 0
      }
    }
  }