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Mo~Jasim

·June 22, 2025

Choosing TypeScript Over JavaScript: A Smarter Move for Modern Web Development

For a long time, JavaScript has been the major language used to make websites. But as apps got more intricate, developers started to have challenges like runtime errors, code inconsistencies, and problems with scaling massive codebases. Microsoft built TypeScript, a tightly typed superset of JavaScript, to solve these concerns. In the past several years, TypeScript has become a common tool in many modern frontend frameworks, such React and Next.js. This blog will talk about how TypeScript is superior than JavaScript and easier and wiser to use, especially when working with React and Next.js.

What does TypeScript mean?

TypeScript is a free programming language that adds static type declarations to JavaScript. JavaScript is dynamically typed, which means that the types are only known while the code is running. On the other side, TypeScript enables you set types for variables, functions, props, and more. This makes it easier to read your code and less likely to have bugs.

Why TypeScript is Important for Web Development Right Now

In the fast-paced world of software development today, it's crucial to use code that is simple to read and understand. That's exactly what TypeScript enables you do.

• TypeScript finds mistakes while you're still coding, not when you're in the browser.
• Better code readability: When types are properly defined, it's easier to understand what a variable or function is supposed to perform.
• Scalability: It's easier to work with big apps when the structure is precisely typed.
• Better tool support: TypeScript makes it easier for editors like VSCode to give you better autocompletions, inline documentation, and rapid fixes.

Why TypeScript Works So Well with React

TypeScript works well with React because React is a library of components, and each component is in responsible of its own props, state, and logic. When you don't utilize TypeScript, it's easy to pass the wrong props, use a method wrong, or add flaws that only show up when the program is running.

Looking at Props

You can use PropTypes in JavaScript, but they don't work with other tools or provide full safety. In TypeScript, you can set up an interface for props that catches problems straight away.

interface ButtonProps {
  label: string;
  onClick: () => void;
}
// This makes sure that the part gets exactly what it wants.

Managing the state more safely

TypeScript is helpful for React components with complicated state logic since it lets you say exactly what type of state is allowed. This cuts down on issues and strange behavior when things are re-rendered or updated.

TypeScript in Next.js: Development that is organized and easy to understand

Next.js is a full-stack framework for React, and it works best when you use TypeScript with it. This is how TypeScript can help you with your Next.js projects:

Strong Typing for API Routes

You may construct backend routes right in your frontend project with Next.js. TypeScript lets you make sure that the structures of your API requests and answers are tightly typed.

Fetching Data That You Can Count On

TypeScript lets you type the data that is returned when you use getStaticProps, getServerSideProps, or getInitialProps. This manner, you can see what shape your data is in and how to use it in your components.

export const getStaticProps: GetStaticProps = async () => {
  const data: MyDataType = await fetchData();
  return { props: { data } };
};

Why TypeScript is Easier Than You Think

TypeScript could look hard at first. But in reality, it makes your task easier.

Code that documents itself

With types in place, you don't need to guess what each function or variable performs. This makes it much easier to train new team members or keep up with outdated code.

Better support for IDEs

Using TypeScript makes developing better. TypeScript's typing system lets modern code editors suggest code, point out flaws, and even give ideas about documentation.

Slowly Taking On

You don't have to write everything again. You can move to TypeScript slowly. You can change the names of your .js files to .ts or .tsx and start adding types where they are needed. It can be changed in any way.

Real-World Use Cases

A lot of prominent software organizations, like Microsoft, Airbnb, and Slack, use TypeScript for their React and Next.js projects. It's easy to see why: it saves time in the long term. Bugs are identified earlier, developers produce cleaner code, and applications become easier to maintain.

Libraries of Components

TypeScript helps you set tight rules for how components can work together when you make libraries of reusable components. This makes sure that everything in your app is the same.

Apps for Big Groups

Managing types helps everyone stay on the same page in big projects with lots of developers. Everyone in the team can see clearly how functions and parts should work.

In conclusion

TypeScript is now the best choice for building websites. It helps developers build code that is clean, reliable, and easy to maintain, especially when they are using React and Next.js. It makes the development process better, cuts down on defects, and makes both small and large projects easier to scale.

Not only does using TypeScript make your project stronger, but it also makes it easier to maintain in the long run and makes developers happy. If you're starting a new React or Next.js project today, it's not only smarter to use TypeScript instead of regular JavaScript, it's also a decision that will last.

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A proffetional freelance web developer with 3.5+ years of experience, building fast, user-friendly websites using React, Next.js.