TypeScript also validates that the code will work correctly and be compatible with all web browsers and platforms and ensures that it is maintainable across multiple themes. The main reason why TypeScript is much more encouraged when writing code rather than using plain JavaScript is that TypeScript code will add static type definitions for JavaScript. Though TypeScript is needed to be converted before being used on the web browser, even frameworks and libraries such as React.js and Angular encourage programmers to use TypeScript rather than using plain JavaScript when developing the code.