1. What is Hoisting? 🤔
2. Variable Hoisting 📝
3. Function Hoisting 🎛️
4. Hoisting Caveats and Best Practices ⚠️
Variable Initialization: While variable declarations are hoisted, their initializations are not. If you access a variable before it’s assigned a value, it will have the value
undefined. It’s best practice to declare and initialize variables before using them.
Function Declarations vs. Function Expressions: Function declarations are hoisted, but function expressions are not. Be mindful of the difference.
Order of Declarations: When multiple variables and functions are declared in the same scope, they are hoisted in the order they appear in the code. This can lead to unexpected behavior if you’re not careful.
const instead of
var. Variables declared with
const are block-scoped, which can help prevent unexpected hoisting-related issues.
Function Declarations at the Top: To make your code more readable and avoid unexpected behavior, it’s a good practice to declare functions at the top of their containing scope.
5. Hoisting and Scope 🔍
Conclusion for a Comprehensive Guide for Developers:
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