vuejs-no-side-effects-in-computed-properties

watch: {
  totalCount: function() {
    if (!this.totalCount) {
      this.fold = false;
      return false;
    }
  },
  fold: function(totalCount) {
    let show = this.fold;
    if (show) {
      this.$nextTick(() => {
        if (!this.scroll) {
          this.scroll = new BScroll(this.$refs.listContent, {
            click: true
          });
        } else {
          this.scroll.refresh();
        }
      });
    }
    return show;
  }
},