TypeScript and JavaScript are both programming languages that are used for web development. While they share some similarities, there are some key differences between the two.

JavaScript is a dynamic scripting language that is primarily used for client-side web development. It is executed in the user's web browser and is used to add interactivity to web pages. JavaScript is a high-level language that is easy to learn and use, and it has a wide range of libraries and frameworks that make it easy to develop web applications.

TypeScript, on the other hand, is a superset of JavaScript that adds static typing and other features to the language. TypeScript was developed by Microsoft and is designed to make large-scale JavaScript applications easier to build and maintain. TypeScript code is compiled into JavaScript code that can run in any web browser or runtime environment that supports JavaScript.

The key difference between TypeScript and JavaScript is that TypeScript is a strongly typed language, which means that it requires variable types to be declared before use. This can help catch errors earlier in the development process and make code easier to read and maintain. TypeScript also includes features like classes, interfaces, and enums, which are not available in JavaScript.

Overall, while JavaScript is a powerful and widely-used language for web development, TypeScript can offer additional features and benefits for larger-scale projects that require more complex code.
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