error content: 
 SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data 
 Technology used in the project 
 node+webpack+vue+vue-router 
 reproduction process: 
 the opening page looks like this: 
 
"" id 
 
 the address bar remains unchanged after closing the pop-up window. Refresh the page at this time, and the error will be reported when you open the pop-up window 
 excuse me: 
 (1) how is this error caused? 
 is it because I use the JSON.parse method? 
 (2) how to correct the address bar without parameters after closing the pop-up window 
