Wechat applet browse docx, pdf and other files online preview using wx.openDocument

wx.downloadFile({ 
        url: fileUrl,//pdf链接
        success(res) {
          wx.openDocument({ //打开文档
            filePath: res.tempFilePath,
            fileType: "pdf",//文档类型
            showMenu: true,
            success: function (res) {
              wx.showToast({
                title: '打开文档成功',
              })
            },
            fail: function (res) {
              wx.showToast({
                title: '打开文档失败',
              })
            },
          })
        },
      })