小程序中点赞和收藏功能的实现代码

focusFavoriteTab: function (e) {
    var that = this;
    var isFocus = that.data.isFocus;
    console.log("isFocus", isFocus)
    var itemId = that.data.itemId;
    if (isFocus) {
      favoriteService.cancel(that, itemId).then((res) => {
        wx.showToast({
          title: "取消收藏",
          icon: 'success',
          duration: 1000
        });
        this.setData({
          isFocus: false,
        });
      })
    } else {
      favoriteService.add(that, itemId).then((res) => {
        wx.showToast({
          title: res.data == 1 ? "收藏成功" : "收藏失败",
          icon: 'success',
          duration: 1000
        });
        this.setData({
          isFocus: true,
        });
      });
    }
  },

focuslikeTab: function (e) {
    var that = this;
    var isLike = that.data.isLike;
    let itemDetail = this.data.itemDetail 
    var itemId = that.data.itemId;
    if (isLike) {
      itemService.cancellike(that, itemId).then((res) => {
        wx.showToast({
          title: "点赞取消",
          icon: 'success',
          duration: 1000
        });
        itemDetail.liked--;
        this.setData({
          itemDetail:itemDetail
        });
        this.setData({
          isLike: false,
        });
      })
    } else {
      itemService.addlike(that, itemId).then((res) => {
        wx.showToast({
          title: res.data == 1 ? "点赞成功" : "点赞失败",
          icon: 'success',
          duration: 1000
        });
        itemDetail.liked++;
        this.setData({
          itemDetail: itemDetail
        });
        this.setData({
          isLike: true,
        });
      });
    }
  },