JS method to convert key-value string to json string

This time I will bring you the key value String JS method to convert the key value string to json string, Precautions for converting the key value string to json string What are the following? This is a practical case, let’s take a look at it.

Key-value pair characters to be converted

 var respDesc=“cardid=64157001&cardnum=1&sporder_id=PD12160428120635001&sporder_time=20160526101552”；
 var newstr = respDesc.replace("=",":\""); 
 var stringObj= "{" +newstr.replace("&","\",") + "\"}";

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