Delete Null Values In Nested Javascript Objects

I have a nested object and want to remove all key/value pairs if the value is null or undefined. I've managed to get the below code working but it doesn't check the nested key/valu

Solution 1:

You're already almost there. Just have the function recurse if the property is another object:

var myObj = {
  fName:'john',
  lName:'doe',
  dob:{
    displayValue: null, 
    value: null
  },
  bbb:null
};

function clean(obj) {
  for (var propName in obj) { 
    if (obj[propName] === null || obj[propName] === undefined || obj[propName] === '') {
      delete obj[propName];
    } else if (typeof obj[propName] === "object") {
      // Recurse here if the property is another object.
      clean(obj[propName])
    }
  }
  return obj;
}
console.log(clean(myObj));