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javascriptjsondefaultoverridingstringify

How to ignore .toJSON function when using JSON.stringify()?

I found out that if you define .toJSON() function for an object, then it's used to stringify an object, rather than default. Is there a way to ignore this overridden function and run the default stringify process?

Solution

  • Redefine the toJSON method in the specified object. For example:

        function kryptonite(key)
       {
       var replacement = {};
       for(var __ in this)
         {
         if(__ in alias)
           replacement[__] = this[__]
         }
    
       return replacement;
       }
    
    var foo, bar;
    var alias = {"Clark":"","phone":""};
    var contact = {
                   "Clark":"Kent",
                   "Kal El":"Superman",
                   "phone":"555-7777"
                  }
    
    contact.toJSON = kryptonite;

    foo = JSON.stringify(contact);

    contact.toJSON = undefined;
    
    bar = JSON.stringify(contact);

    console.log("foo: ", foo);
    console.log("bar: ", bar);

    References