What is the main difference between function declaration and function expression in JavaScript?
- Function declarations are hoisted, while function expressions are not.
- Function expressions can be named or anonymous, while function declarations must have a name.
- Function declarations are used for defining methods in objects, while function expressions are used for standalone functions.
- Function expressions are more efficient than function declarations.
The primary difference between function declaration and function expression in JavaScript is hoisting. Function declarations are hoisted, which means they are moved to the top of their containing scope during compilation. This allows you to call the function before it's declared in your code. Function expressions, on the other hand, are not hoisted, so they can only be used after their declaration in the code. Understanding this difference is crucial for managing the order of function calls in your JavaScript programs.
Loading...
Related Quiz
- The method _______ returns the index of the first element in the array that satisfies the provided testing function.
- In a performance-critical application, minimizing the reshuffling of array elements is vital. What method might be avoided when removing elements due to its time complexity?
- What is the most common issue developers might face when working with closures and loops together?
- _________ is the organization that now oversees the ECMAScript specification, which serves as the basis for JavaScript.
- In JavaScript, the _______ method is used to create a new object using an existing object as the prototype of the newly created object.