I am new to Nodejs and Express and want to search some results from mongoDB and show it on client browser, i can find the values from the mongoDB query but not able to send it to client js file, It says doc is not defined, any help will be appreciated.I am new to Nodejs and Express and want to sear
阅读背景：
如何使用Express和MongoDB将json从nodejs服务器发送到客户端js文件
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