JS handles the JSON "invalid label" error

JSON is a convenient data transmission method when you use Ajax.
However, for many people, the "invalid label" error is a very troublesome problem. It seems that the JSON string is correct. How can this problem be solved?

For exampleCode:

 
  
  


   
   
Function Handle_success(Response){

   
   
VaRJSON= Eval(Response); // Response = "{'foo': 'bar '}";

   
   
}

  
  
 

The browser will report that invalid label is incorrect because Eval will try to interpret your response as a label. When you directly write in the script:

 
  
  


   
   
<Script>

   
   
{'Foo' : 'Bar'};

   
   
</Script>

  
  
 

The principle of the error is the same.

There are two solutions:

 
  
  


   
   
VaRJSON= Eval('(' +Response+ ')'); // Response = "{'foo': 'bar '}";

   
   
 

  
  
 

Or

 
  
  


   
   
Eval('Var JSON =' +Response); // Response = "{'foo': 'bar '}";

   
   
// JSON is available now