Inheritance | Prototype

In javascript everything is an object.

    <script>

        let obj1 = {};

        obj1.name = "obj1";

        obj1.run = function (){

            console.log("Obj1 can run !");

        };

        let obj2 = {

            colour : "red"

        };

        console.log(obj1.__proto__.__proto__);

        obj2.__proto__ = obj1;    // obj1 stored in obj2's prototype object

        console.log(obj2.name);

        obj2.run();

    </script>

In example, obj1 is stored in prototype object of obj2 so it can accessible by obj2 methods.