JavaScript is a bit confusing for developers coming from Java or C++, as it’s dynamic and does not provide a class implementation, although the keyword class is a reserved keyword and cannot be used as either a variable name or a property. JavaScript inheritance uses just three key ideas:

• An object’s methods (like all properties) are found by walking up the object’s prototype chain;
• The entries in the prototype chain are references to ordinary objects;
• Object.create() or the new operator creates objects with a longer prototype chain.

Here is a simple Javascript inheritance example to learn from:

var user;

function Person (name) {
  this.name = name;
}

Person.prototype.hello = function() {
  console.log('Hello', this.name);
};

// Student inherits from Person

function Student (name) {
  this.name = name;
}

Student.prototype = new Person;

user = new Student('George');

// This method was defined on Person

user.hello();

If you are interested to read more about prototype chains check here: Inheritance and the prototype chain.