Question

I want to directly convert a javascript object to string. I used following code.

var foo = {};  
foo.test1 = test1;  
foo.test2 = test2;  
foo.test3 = test3;  

var jsonObj = JSON.stringify(foo); 

It works fine but it uses the json2 javascript library. However I need to do this in plain javascript without using any libraries. I know creating the json feed using passed parameters will work like this.

var jsonObj = "{\"test1\":\"" + test1+ "\",\"test2\":\"" + test2+ "\",\"test3\":\"" + test3+ "\"}";

However if the passed parameters(test1, test2 and test3) contains double quotes it will have issues.

What is the best approach to achieve this?

Thank you

Answer 1

You should escape the double quotes by performing a String.replace(/"/g, "\\\"") on each key and member. For this to work however, you need to guarantee that you will only have simple strings/ numbers in your JS object.

FYI, it should be noted that the json2 library will only be used when a native implementation of JSON does not exist; all modern browsers have JSON support build in (IE < 8 is the noticable exception).