Hoisting A Quick Look Behind the Scenes

In JavaScript, hoisting is a behavior where variable and function declarations are treated as if they were moved to the top of their scope (global or function) before code execution. it's important to understand how it works to write clean and predictable code.

a.??? What Hoists in TypeScript:

?????????????? i.???? Variable Declarations (var): While var is generally discouraged due to potential scoping issues, it still gets hoisted in TypeScript code when compiled to JavaScript.

???????????? ii.???? Function Declarations: Similarly, function declarations are hoisted, meaning they can be called before their definition in the code.

b.?? What Doesn't Hoist: let and const Variables: These modern variable declarations are not hoisted. Their values are only accessible after the line where they are declared is executed. Let/Const Block Scoping: Unlike var, let and const respect block scope. You cannot access them before their declaration within a code block.

Best Practices: Always use let or const for variables to benefit from block-level scoping and avoid potential hoisting-related issues. Declare variables at the top of their scope whenever possible to improve code readability and maintainability. If working with legacy code or libraries: Be aware of how var behaves with hoisting to avoid surprises. By understanding hoisting and applying these best practices, you can write cleaner and more predictable TypeScript code, ensuring that your variables and functions behave as intended.