Constructors In JavaScript | Introduction To Constructors | JavaScript Tutorial | SimpliCode
This video on Constructors in JavaScript will take you through the basics of using constructors in JavaScript. This tutorial will take you through the introduction to constructor function and object constructor method. We’ll understand the two different ways of creating an object with the help of constructors. Below are the points we are going to discuss in this JavaScript tutorial for beginners’ video.
00:00:00 Introduction
00:01:30 Object Constructor.
00:06:35 Difference between Object Literal & Object Constructor.
00:07:30 Constructor Function.
00:13:35 Advantage of using Constructor Function
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What is a Constructor?
The constructor method is a special method for creating and initializing an object of that class. A constructor is basically a function that creates an instance of a class which is typically called an “object”. In JavaScript, a constructor gets called when we declare an object using the new keyword. The purpose of a constructor is to create an object and set values if there are any object properties present. The main advantage of using the constructor function method is we can add as many objects as we want without any problem.
Introduction to JavaScript:
JavaScript is a scripting language that is used to create and manage dynamic web pages, basically anything that moves on your screen without requiring you to refresh your browser. It can be anything from animated graphics to an automatically generated Facebook timeline. When most people get interested in web development, they start with good old HTML and CSS. From there, they move on to JavaScript, which makes sense, because, these three elements together form the backbone of web development. HTML is the structure of your page like the headers, the body text, any images you want to include. It basically defines the contents of a web page.CSS controls how that page looks (it’s what you’ll use to customize fonts, background colors, etc.). JavaScript is the third element. Once you’ve created your structure (HTML) and your aesthetic vibe (CSS), JavaScript makes your site dynamic (automatically updateable).
What is object literal method in JavaScript?
A JavaScript object literal is a comma-separated list of name-value pairs wrapped in curly braces. Constructors encapsulate data, enclosing it in a tidy package. This minimizes the use of global variables which can cause problems when combining code.Whenever we are working with a single object or when we know everything about the properties and the behaviour of an object. We should always use the object literal method.
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