What is TypeScript?

Writing TypeScript code means writing JavaScript code(ES6, ES7,etc.,) .Sometimes TypeScript is referred as a superset of JavaScript.

Want a TS playground? Here is the official one: https://www.typescriptlang.org/play/

TypeScript = JavaScript + 'A type system'

The TypeScript type system has the following features:

Process of writing and compiling

We write TypeScript code(JS with type annotations), then compile it using the TypeScript compiler. We get plain JavaScript code as output from TypeScript compiler.

TypeScript just act as a helper during development. It doesn't have any effect or performance optimization in the resultant JavaScript code.

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