clear the properties of an object in js code example

Example 1: js remove undefined from object

Object.keys(obj).forEach(key => obj[key] === undefined && delete obj[key])

Example 2: javscript remove a property

var myObject = {
    "name": "jon",
    "gender": "male",
    "registered": "yes"
};
delete myObject.gender;

console.log(myObject);

//other methods
delete myObject.gender;
// or,
delete myObject['gender'];
// or,
var prop = "gender";
delete myObject[prop];