js h2标签出现NaN错误

一开始以为是我的数据有问题 结果一看是+号拼接问题

 

修改之前代码

let list=data;
let div = '';
for (let i=0;i"+"机器人id:"+list[i].robotId+" "+
          +"

"+"地址:"+list[i].msgId+"

" + +"

"+"状态:"+list[i].status+"

" + +"

"+"温度:"+list[i].temp+'℃   '+'湿度:'+list[i].humidity+'%'+ "

"+ "
" } $('#robot').prepend(div)

修改之后代码

let list=data;
let div = '';
for (let i=0;i"+"机器人id:"+list[i].robotId+" "+
          "

"+"地址:"+list[i].msgId+"

" + "

"+"状态:"+list[i].status+"

" + "

"+"温度:"+list[i].temp+'℃   '+'湿度:'+list[i].humidity+'%'+ "

"+ "
" } $('#robot').prepend(div)

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