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,        });      });    }  },