vuetify v-slider在单击滑块后无法获取新位置

更改幻灯片位置后无法获得值;-)

      <v-slider @change="setPosition()" :value="trackProgress" :v-model="percentage" thumb-label></v-slider>


    data() {
      return {
        percentage: 0
      };
    },
    computed: {
        trackProgress: function() {
          return this.progress * 100;
        }
      },
    methods: {
        setPosition() {
          console.log("SET POSITION: ", this.percentage); // always 0 !!!
          // this.setProgress(this.percentage / 100);
          // this.togglePlayback();
        }
    },