What are Type Guards in TypeScript?

Thank you for posing such an insightful question. Type Guards are a fascinating and powerful feature of TypeScript, which plays a pivotal role in ensuring our code is type-safe. At its core, a Type Guard is a technique used to inform the TypeScript compiler about the specific type of a variable, usually within a conditional block. This knowledge allows the compiler to correctly infer the type, enabling us to work with the variable under that assured type context. Let me elaborate further by using an example, which should make the concept clearer. Imagine we have a function that takes an input parameter that could either be a number or a string. Our objective is to process this input differently based on its type...