Wechat applet returns to the previous page and transfers parameters

     itemClick: function(e) {
          let pages = getCurrentPages();
          let prevPage = pages[pages.length - 2];
          prevPage.setData({
               message: e.currentTarget.dataset.msg,
          })
          wx.navigateBack({
               delta: 1,
          })
     },

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• getCurrentPages() Function to get an instance of the current page stack , Given as an array in the order of stacks
• pages[pages.length - 2] It's the last page ,-1 It's the current page
• Then directly call the... On the previous page setData Method
• message Is the variable defined on the previous page ,e.currentTarget.dataset.msg Data to be transferred for the current page
• And then call wx.navigateBack return ,delta Indicates the number of pages returned , If delta Greater than the number of existing pages , Then go back to the home page .

Wechat applet Close current page