TypeScript VS JavaScript
Tags: javascript, typescript
Published: 2022-12-22 12:53:45

**Introduction**

As a developer, you have probably heard of both JavaScript and TypeScript. But what's the difference between the two, and which one is right for your project? In this blog post, we'll take a closer look at the key differences between JavaScript and TypeScript and explore the pros and cons of each language.

**What is JavaScript?**

JavaScript is a programming language that is widely used on the web. It is used to add interactivity and functionality to websites, such as creating drop-down menus, form validation, and handling events like clicks and hover effects. JavaScript is a client-side language, meaning that it is executed by the user's web browser, rather than on the server.

**What is TypeScript?**

TypeScript is a programming language that is a superset of JavaScript, meaning that it includes all of the features of JavaScript and adds some additional ones. One of the main features of TypeScript is static typing, which allows you to specify the data type of a variable when you declare it. This can help catch errors in your code before you run it, as the type system can detect problems when you try to use a variable in a way that is not compatible with its type.

TypeScript also has improved support for object-oriented programming concepts, such as classes and interfaces, which can make it easier to write modular, reusable code.

Javascript was first conceived as a client-side language. But it was also used as a server-side later on.
Using it in the backend makes the code complex and full of bugs. Because of this reason Typescript was introduced.


**Pros and Cons of JavaScript**

**Pros:**

**Widely used and supported:** JavaScript is the most popular programming language on the web, so it is well-known and well-documented, with a large community of developers who can help answer questions and provide support.

**Versatility:** JavaScript can be used to build a wide variety of applications, from simple websites to complex web applications and even mobile apps.

**Easy to learn:** JavaScript is a relatively easy language to learn, especially for developers who are familiar with other programming languages.

**Interoperability:**Javascript can easily communicate with web building tools like HTML and CSS.

**Cons:**

**Lack of type safety:** Because JavaScript is a dynamically-typed language, it can be easy to make mistakes when using variables and functions. This can lead to runtime errors that can be difficult to debug.

**Poor scaling:** As a codebase grows, it can become difficult to maintain and understand without a clear structure. This can be especially challenging in JavaScript, as it does not have strong support for object-oriented programming concepts.

**Permissive nature:**Javascript is often described as a laid-back language that can cause different problems for programmers using it. Debugging can be particularly hard because of this.

**Pros and Cons of TypeScript**

**Pros:**

**Improved type safety:** The static typing system in TypeScript can help catch errors in your code before you run it, saving you time debugging and making it easier to spot problems early on.

**Better scaling:** The improved support for object-oriented programming concepts in TypeScript can make it easier to write modular, reusable code, which can make it easier to maintain and scale a large codebase.

**Compatibility:** Because TypeScript is a superset of JavaScript, any valid JavaScript code is also valid TypeScript code. This means that you can gradually introduce TypeScript into your project without having to completely rewrite your codebase.

**Increased team performance :*Typescript can eliminate a lot of bugs during the building process itself. This contributes to the increased performance of programmers.

**Cons:**

**Requires learning a new language:**If you are already familiar with JavaScript, you will need to learn the additional features of TypeScript before you can use it effectively.

**May not be necessary for all projects:** Depending on the size and complexity of your project, the additional features of TypeScript may not be worth the effort to learn and use.

**Overly Complicated typing system:**Typescript has an overly complicated typing system that can seem hard to learn especially to those programmers who don't have any background in statically typed languages like java,c++, etc.

**False sense of security:**Typescript checks types only during compilation. It is compiled to javascript which doesn't have type security. So typescript in a way creates a false sense of security because there can be type-related bugs even when we create an application in typescript.

**Conclusion**

Javascript and Typescript are both industry favorite technologies used to create mobile and web apps. Both are reliable tools and have a good future ahead.