What is TypeScript? Strongly typed JavaScript
Briefly

TypeScript builds upon JavaScript's popularity by introducing strong typing and object-oriented programming features, making enterprise development more efficient and reducing errors during coding.
TypeScript’s strong typing empowers developers by checking variables and data structures for validity, enhancing productivity in managing large codebases often seen in enterprise applications.
Unlike JavaScript, TypeScript is compiled, which allows for the detection of errors before execution, thus fostering a more robust development environment for complex applications.
TypeScript is a superset of JavaScript, allowing any valid JavaScript code to be valid TypeScript, while also providing additional capabilities that aren't available in JavaScript.
Read at InfoWorld
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