Explore the intricacies of JavaScript's global scope, including best practices, pitfalls, and optimization tips for managing global variables effectively.
Explore the concept of function scope in JavaScript, learn how it affects variable accessibility, and understand its importance in managing variables and avoiding side effects.
Explore the concept of block scope in JavaScript, focusing on the use of `let` and `const` for variable declarations. Learn how block scope differs from function scope, and discover best practices for using `let` and `const` to write cleaner, more efficient code.
Explore the intricacies of JavaScript's scope chain and variable lookup process. Learn how variables are resolved in nested scopes, and understand the importance of scope chains in debugging and writing predictable code.