Are you feeling overwhelmed with Javascript? Do you feel confused about which features you should focus on? With multiple powerful features, Javascript can make people confuse sometimes!
Having a complete understanding of the different programming languages is considered to be extremely rewarding for someone looking to start their career in the programming field. This multidisciplinary field offers a lot of new opportunities.
In this article, I will shed some light on the 10+ key features of Javascript, along with its types. I will also define this programming language in detail below. If you are a developer or newbie looking to start a career in programming, joining a Full-Stack Web Development Course can add some brownie points.
These features not only help you write better code but boost your overall performance, therefore leading to an increase in your confidence level.
Let’s learn more about Javascript by learning its exclusive features below!
Learn Full-stack Web Development designed by industry experts with strategical planning that makes the way simpler for newbies.
What is JavaScript?
Javascript is one of the most dynamic and powerful programming languages. Websites have become highly intuitive and engaging by using this language. Web pages may have features like forms, animations, and buttons with the help of JavaScript. It uses HTML and CSS to develop dynamic and responsive web pages.
The two major web browsers that support Javascript are Chrome and Firefox. It makes it simple for users to easily interact with websites. It may be employed to develop applications, catchy games, and even complex servers. It is primarily utilized by developers and is easy to access and apply.
JavaScript is popularly employed by large websites like Facebook and Google. Developing stunning, dynamic, and modern websites is more straightforward with the application of JavaScript programming language. It is considered a significant and most effective skill for the one who wants to thrive in web development!
Table of Contents
Types of Javascript Programming Language
Javascript is the most demanding and versatile programming language. There are eight different types of Javascript programming languages, including Number, Boolean, Bigint, Object, Undefined, Null, and Symbol.
I have tried to discuss each type in detail in the below section.
Let’s get started;
1. Undefined
One of the most common types in Javascript is Undefined value. A variable that is declared already but yet does not offer a value is known as undefined. If the variables are not configured, there exists the default value. A function provides undefined values if it does not return any value.
One instance is;
let z;
Console.log (z); //Output: undefined
2. Number
Numbers in Javascript can be saved in decimal format. It can also be written without or with decimals. Both the integer and floating-point numbers are highlighted by the Number type of JavaScript. Decimal, negative, and positive numbers are stored in Javascript. Unique numeric values such as NaN (Not-a-Number) and Infinity are also there in JavaScript.
One instance is;
let num = 100;
let price = 999.99;
Console.log (num, price);
3. Null
Another primary type of Javascript is Null. This highlights a value that is unknown or empty. It is possibly allocated to a specific variable while there exists no value. It is opposed to the undefined value of Javascript.
The null values are falsy which is only evaluating to a condition that is false. Null and Undefined values are quite interrelated to each other. And none of them are falsy values.
One example is,
let value= null;
console.log(value); //Output: null
4. Boolean
A boolean type is another major type of Javascript. This only offers 2 values, and they are either true or false. This type of Javascript is especially applied in logical functions or tasks, making vital decisions and conditions. The boolean value checking is quite simple and easier as compared to other types of Javascript.
One example is,
let isFunny= true;
console.log(isFunny); //Output: true
5. Bigint
This is referred to as a new data type, which is generally employed to save large or impossible-to-represent integer values by a general Javascript number. All the Javascript values are saved in a format that is 64-bit floating point. This is usually made just by inserting n after a number.
An example of BigInt is as follows;
let bigInt = 123456789012345678901234567890n
consol. log (bigNumber);
6. Object
Object-oriented programming contains both the in-built object datatypes and user-type object data types. This type of Javascript helps to gather multiple values in the form of key-value pairs. These object datatypes are often applied to collect complex data with the help of employing curly braces “{}”
One instance is,
let person = { name: “Paul”, age: 40};
console.log(person.name); //Output: Paul
7. String
Strings in Javascript highlight texts. These are developed within either double (“), single (‘), quotes or backticks.
One instance is;
let text= “Hello, World!”;
console.log(text);
8. Symbol
The symbol in Javascript is considered as the unique value which is employed as object keys. Symbols assist to limit the conflicts associated with naming.
One example is let id = Symbol (“id”);
console.log(id);
What are the Features of Javascript Programming Language?
I have crafted a list of the top 10+ features of the Javascript programming language below and tried to state them in a detailed manner.
Here are those;
1. Interpreter
One central among other popular features of Javascript is better interpretation. This removes the demand for an additional compilation phase and enables the source code to be executed by line. The code is run automatically by the in-built engines of JavaScript in browsers. As the application does not require to be compiled prior to testing, development may continue more easily. The script interrupts at that line and highlights the error in the console if there is an issue. This specific feature makes it simple for developers to detect and address errors in their code quickly.
2. Dynamic Typing
The dynamic typing nature of JavaScript is considered to be another significant one so that you don’t have to hurry to enter the type of a variable. Highly relying on the value that is saved in the variable, the specific type is immediately assigned. Coding gets easier and more flexible as an outcome. A variable can have a range of values at various stages in time. For example, a variable can contain a number primarily and then a string. Dynamic typing, although, can often lead to unexpected issues if data types are modified improperly.
3. Async Processing
Several functions can run together without waiting for previous tasks to be completed due to the specific asynchronous processing feature of JavaScript. Performance is boosted by this, specially the ones in web applications. Asynchronous operations are managed smoothly by tasks such as ‘setTimeout,’ ‘Promises,’ and ‘setInterval.’
Writing and handling asynchronous code gets more straightforward and more transparent with keywords like await and async. Functions like reading files, handling user interfaces, and retrieving data from a server without stopping the program benefit from this specific feature.
4. Light-weight Scripting Language
Javascript is a popular scripting language that is considered one of the key features. This is viewed as one of the crucial features of Javascript. This scripting language makes use of small storage and offers ease of access. It is primarily used for adding live content updates, form animations, and validations to web pages. JavaScript performs without the demand for any additional software, in contrast to other programming languages. It is an excellent choice for web development due to its clean syntax and fast completion.
5. Arrow Functions
Developing tasks in JavaScript can be simplified with the specific arrow functions. They do not require the function keyword, and rather, they use the => (arrow) sign. Code that is simpler and more easy to comprehend can be written with the assistance of arrow functions. They are ideal for working with callbacks and objects as they also manage this independently. As an example,
const add = (a, b) => a+b;
console.log(add(6, 5)); //Output: 11
6. Server-side Support
JavaScript allows server-side programming along with front-end development. Database connections, API development, and file management are some specific instances of server-side operations that JavaScript can handle easily through the application of Node.js. This is viewed as one of the crucial features of Javascript.
Due to this, JavaScript is a full-stack programming language, allowing developers to develop entire web applications in only one programming language. As server-side JavaScript removes the requirement to move among programming languages, development can proceed more quickly and effectively.
7. Prototype Based
JavaScript makes use of an inheritance system depending on prototypes instead of the traditional class-based procedure. In JavaScript programming language, every object can apply prototypes to get properties and methods from additional objects.
Due to this, object-oriented programming is highly dynamic and helpful. JavaScript allows the direct development and design of objects from other objects as compared to the formulation of classes. As various examples share procedures and features, prototypes help in saving memory conservation.
8. DOM Manipulation
Professionals or random users can perform with and adjust the Document Object Model with the application of JavaScript. DOM, or the Document Oriented Model, is responsible for highlighting the components and content of a web page.
Programmers can actively modify text, graphics, and styles, even include or delete elements with JavaScript. This specific feature boosts the responsiveness and engagement of web pages. Tasks such as getElementById, querySelector and more allow real-time component use and adjustment.
9. Cross-browser Compatibility
JavaScript programming language is supported with Chrome, Safari, and Firefox, among other excellent and highly functioning web browsers. By performing so, web applications are ensured to perform separately over different devices and platforms. This is one of the key features of Javascript.
Yet, specific features might act independently, relying on the web browser. Extensive libraries like polyfills and Babel are applied highly by programmers to make JavaScript code supported with obsolete web browsers. A smooth user experience relies highly on cross-browser compatibility.
10. Event Handling
The robust event-handling mechanism offered by JavaScript enables developers to react to user input. Mouse movements, keystrokes, clicks, and form submissions are examples of events. Event handlers can be attached to components by developers using functions like addEventListener. This enhances the interactivity of web apps. Managing several events well with event delegation enhances performance and lowers code complexity. This is one of the significant features of Javascript.
11. Object-oriented Programming
Elements of object-oriented programming (OOP) like encapsulation, polymorphism, and inheritance are made possible by the dynamic programming language JavaScript. Large programs are simple to manage when data and procedures are saved as objects.
The class The keyword class was included by JavaScript to make object development more simpler. While being a programming language that is prototype-led, it allows developers to arrange and use their code by applying OOP or object oriented principles.
12. Single-threaded
One task at a time is executed in a single execution thread offered by JavaScript, which is a single-threaded programming language. However, it can seamlessly handle various jobs with asynchronous programming. Through the handling of background tasks without disrupting the main run flow, the event loop ensures that JavaScript stays highly user-intuitive. Due to this feature, JavaScript is highly recommended and crucial for web development, but in order to restrict lagging, large functions should be managed precisely.
Final Thoughts,
In this versatile world of programming, Javascript has modified itself a lot and completely changed into a more powerful language. If you gather in-depth knowledge about this specific programming language, such as features of Javascript, types, and more, as a developer, it will be easy for you to handle complex development tasks.
Hope I have highlighted the stunning and unique features of Javascript in the aforementioned sections in very simple and easy terms. In addition to this, I have also included the definition of Javascript and it’s types above.
Whether you are a newbie or a developer, getting to know these exclusive features of Javascript will help you to work freely on challenging development projects. So, don’t hesitate to join a Certification in Full-Stack Web Development Course and unleash the opportunities of this excellent programming language.
Happy reading.