It uses a gradual typing system to catch type-related errors during compile time, which would otherwise only be discovered at run time.

It provides a Readonly type that enforces deep immutability on objects at run time, preventing any modifications to their properties.

It fundamentally simplifies asynchronous programming, removing the need for callbacks or continuations.

It allows for the use of arrow functions and the const keyword, which are not available in JavaScript.

It introduces a build chain that transpiles code, making it run significantly faster in the browser than equivalent JavaScript code.