prototype.js

/***********************************************************    
// [ toString, valueOf, isPrototypeOf, hasOwnProperty,....]
//  obj ==> obj.prototype (Object prototype) ==> null
Object Prototypes in JavaScript  
***********************************************************/

let obj1 = {
    prop1: () => console.log('prop1')
};

let obj2 = {
    prop2: () => console.log('prop2')
}
Object.setPrototypeOf(obj2, obj1);
//
//obj2.prop2();
//obj2.prop1();
//obj2.toString();

//Object.getPrototypeOf(obj2).prop1();
console.log(Object.getOwnPropertyNames(obj2) )
console.log(Object.getOwnPropertyNames(obj1) )
console.log(Object.getOwnPropertyNames( Object.getPrototypeOf(obj1) ) )

for(let prop in obj2){
    console.log(prop);
}

//Object.create()
//Object.assign()