TypeScript vs. JavaScript: The Difference You Should Know

  Updated 01 Nov 2023

Transforming Healthcare

JavaScript and TypeScript are both essential languages in web development, but they have distinct differences. JavaScript, widely used for web projects, is versatile and widely supported. On the other hand, TypeScript, a superset of JavaScript, adds static typing and other advanced features, making it ideal for larger applications. In this article, we delve into the key disparities between TypeScript and JavaScript, exploring their types, features, and advantages. Discover which language is the right fit for your project’s scale and specific needs by exploring the differences between TypeScript and JavaScript, including their respective types, features, and advantages.

What is TypeScript?

TypeScript is a statistically compiled programming language that extends JavaScript by providing optional typing, making code clear and concise. It can be used for both server-side and client-side applications and offers features such as interfaces, unions, inheritance, namespaces, and visibility scopes. This programming language supports both dynamic and static language. Moreover, it offers functions, modules, expressions, statements, variables, and comments.

Types of TypeScript

TypeScript is a versatile programming language that offers a wide range of types to help developers write more expressive and reliable code. In addition to the basic types like string, boolean, and number, Below we have mentioned some other types of this language that are expressive of TypeScript.

1. Void

A void is used when there is no value added. Usually, it is used for the return type of function that generally returns nothing.

2. Any and Unknown

A type named Any, i.e., anything that you wish, covers unknown in its type-safe system. Any allows you to assign a JavaScript variable whenever you wish to escape the type system.

3. Never

Never is the return type for anything that must never happen, like an exception-throwing function.

4. Union and Intersection types

These types enable users to create custom types according to the logic. Union types let you type to take one of the many basic types. Intersection types allow you to combine various basic types into one type.

What is JavaScript?

JavaScript is a popular high-level programming language primarily used for web development. It is a versatile language that allows developers to add interactivity and dynamic elements to websites. JavaScript is supported by all major web browsers and can be used for both client-side and server-side scripting. It provides features for manipulating and controlling web page content, handling events, and communicating with servers. JavaScript is known for its flexibility, simplicity, and wide adoption, making it the backbone of modern web applications.

Types of JavaScript

There are eight common types of JavaScript which include:

1. String

A String, intuitively, is a sequence of characters. They are written by surrounding them with backticks, apostrophes, or quotes. Strings can be interpolated, split, trimmed, joined, and concentrated.

2. BigInt

It is a numeric data type in JavaScript that allows for the representation and manipulation of arbitrarily large integers. It is designed to handle numbers beyond the range of the standard Number data type in JavaScript, which is limited to 64-bit floating-point precision.

3. Undefined

It represents a variable or value that has not been assigned a value or has been explicitly set to “undefined”. It is one of the primitive data types in JavaScript.

4. Boolean

True and False are the two Boolean values. Operators producing Boolean values are! (“not”), && (“and also”), and || (“or else”).

5. Symbol

In JavaScript, the “symbol” type is a primitive data type used to create unique identifiers. Symbols are immutable and unique, meaning that each symbol created using the Symbol() function is guaranteed to be unique.

Key differences between TypeScript and JavaScript

1. Static Typing vs. Dynamic Typing

One of the fundamental differences between TypeScript and JavaScript is the approach to typing. JavaScript is dynamically typed, meaning that variables can hold values of any type. TypeScript, on the other hand, introduces static typing, allowing developers to define types for variables, function parameters, and return values. This brings enhanced type safety and helps catch errors during the development process.

2. Language Features

TypeScript is a superset of JavaScript, meaning that all valid JavaScript code is also valid TypeScript code. However, TypeScript adds several powerful features on top of JavaScript, such as interfaces, classes, modules, and inheritance. These features promote better code organization, reusability, and maintainability, especially in larger codebases.

3. Tooling and Development Experience

TypeScript offers superior tooling support and developer experience compared to JavaScript. With TypeScript, developers benefit from features like autocompletion, code navigation, and refactoring tools, which enhance productivity and make code maintenance easier. TypeScript’s static typing also provides better code documentation and self-discovery, making it easier for developers to understand and work with existing codebases.

4. Scalability and Large-Scale Applications

TypeScript shines when it comes to developing large-scale applications. Its static typing helps catch potential issues early on, making it easier to manage and refactor complex codebases. TypeScript’s type system enables better collaboration among developers, reduces bugs, and enhances overall code quality, making it an excellent choice for enterprise-level projects.

5. Compatibility and Migration

One of the significant advantages of TypeScript is its compatibility with JavaScript. Existing JavaScript codebases can be gradually migrated to TypeScript by adding type annotations incrementally. This allows developers to leverage the benefits of TypeScript while still utilizing existing JavaScript libraries and frameworks.

6. Community and Ecosystem

Both TypeScript and JavaScript have thriving communities and vast ecosystems. JavaScript, being a mature language, has a larger number of libraries, frameworks, and resources available. However, TypeScript’s popularity has been rapidly growing, and it has gained significant community support. Many popular JavaScript libraries and frameworks now offer TypeScript typings, making it easier to integrate TypeScript into projects.

Why Choose TypeScript: Advantages and Benefits

TypeScript has gained significant popularity among developers due to its numerous advantages and benefits over JavaScript. Here are some compelling reasons why you should consider using TypeScript for your next project:

  • TypeScript introduces static typing to JavaScript, allowing you to define explicit types for variables, function parameters, and return values.
  • It offers excellent tooling and IDE support, including code completion, type checking, and refactoring. This leads to improved productivity, as developers can catch errors early, navigate code more efficiently, and take full advantage of intelligent code suggestions.
  • With static typing and a more structured approach, TypeScript makes code easier to understand, read, and maintain.
  • TypeScript enforces stricter coding standards and reduces the likelihood of bugs and inconsistencies, especially in larger codebases.
  • By leveraging features such as classes, modules, and interfaces, you can organize your code into reusable and maintainable components.

Why Choose JavaScript: Advantages and Benefits

JavaScript is a versatile and widely adopted programming language that powers the dynamic behaviour of websites and web applications. Here are some key advantages and benefits of choosing JavaScript:

  • JavaScript is one of the most popular programming languages and has a vast community of developers. This means abundant resources, libraries, frameworks, and support available to help you in your development journey.
  • JavaScript runs on the client side as well as the server side, making it suitable for developing full-stack applications.
  • This language has a rich ecosystem with a plethora of libraries and frameworks like React, Angular, and Vue.js. These tools make it easier to build interactive user interfaces, manage application states, and handle complex data operations.
  • JavaScript has a gentle learning curve, especially for beginners in programming. Its syntax is similar to other high-level languages, making it accessible for developers coming from different backgrounds.
  • It enables rapid development due to its interpreted nature and dynamic typing. Developers can quickly prototype and iterate on ideas, resulting in faster time-to-market for web applications.

Wrapping Up

While JavaScript remains the de facto language for web development, TypeScript offers additional features and benefits that make it a strong contender, especially for larger projects and teams. Ultimately, the choice between TypeScript and JavaScript depends on the specific requirements and goals of your project. We understand the importance of selecting the right language and technology to meet your project needs.

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Table of content
  • – What is TypeScript?
  • – Types of TypeScript
  • – What is JavaScript?
  • – Types of JavaScript
  • – Key differences between TypeScript and JavaScript
  • – Why Choose TypeScript: Advantages and Benefits
  • – Why Choose JavaScript: Advantages and Benefits
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