What is Constructor Functions:
You often need to create multiple objects with the same structure. Instead of writing objects repeatedly, JavaScript provides Constructor Functions to make object creation easier and reusable.
Explanation
function Person() → Constructor function (capital letter by convention)
this.name → property of the object
this.age → another property
At this stage no object is created yet.
The function only defines how objects should be built
What Happens When new is Used ?
Step 1 — Create Empty Object
Step 2 — this Points to the Object
Step 3 — Add Properties
Step 4 — Return the Object
Then
Role of this in Constructor Functions:
In a constructor function, the keyword this refers to the new object that is being created.
When you create an object using the new keyword, JavaScript automatically creates an empty object and sets this to that object inside the constructor.
Modern Alternative — ES6 Classes:
ES6 Classes are the modern way to create objects in JavaScript, introduced in ECMAScript 2015 (ES6).
Before ES6, developers used constructor functions to create objects.
Now JavaScript provides classes, which make the code cleaner and easier to read.
Simple to Understand:
Top comments (0)