typeof Type Guards

typeof in TypeScript is a way to narrow down the type of a variable based on its JavaScript typeof operator result. This allows you to write more precise code by checking the type of a variable (like string, number, boolean, symbol, or object) and then treating it accordingly within a specific block of code. By inspecting a variable's fundamental JavaScript type, TypeScript can infer a more specific type within that conditional block, helping catch potential errors and enabling safer operations.