"new js" Code Answer's

new keyword in js

By Wandering Wolf on May 22, 2020

ObjMaker = function() {this.a = 'first';};
// ObjMaker is just a function, there's nothing special about it that makes 
// it a constructor.

ObjMaker.prototype.b = 'second';
// like all functions, ObjMaker has an accessible prototype property that 
// we can alter. I just added a property called 'b' to it. Like 
// all objects, ObjMaker also has an inaccessible [[prototype]] property
// that we can't do anything with

obj1 = new ObjMaker();
// 3 things just happened.
// A new, empty object was created called obj1.  At first obj1 was the same
// as {}. The [[prototype]] property of obj1 was then set to the current
// object value of the ObjMaker.prototype (if ObjMaker.prototype is later
// assigned a new object value, obj1's [[prototype]] will not change, but you
// can alter the properties of ObjMaker.prototype to add to both the
// prototype and [[prototype]]). The ObjMaker function was executed, with
// obj1 in place of this... so obj1.a was set to 'first'.

obj1.a;
// returns 'first'
obj1.b;
// obj1 doesn't have a property called 'b', so JavaScript checks 
// its [[prototype]]. Its [[prototype]] is the same as ObjMaker.prototype
// ObjMaker.prototype has a property called 'b' with value 'second'
// returns 'second'

Source: stackoverflow.com

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keyword new js

By Happy Hyena on Jan 22, 2020

function Car(make, model, year) {
  this.make = make;
  this.model = model;
  this.year = year;
}
//create a object with three keys, make, model, and year

var myCar = new Car('Eagle', 'Talon TSi', 1993);
// use the new operator to create any number of car objects with this template object Car above

Source: developer.mozilla.org

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new js

By Smoggy Swiftlet on Apr 16, 2021

The new operator lets developers create an instance of a user-defined object type or of one of the built-in object types that has a constructor function.

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