What are the differences between functions in JavaScript?

What are the differences between functions in JavaScript?

In JavaScript, there are several types of functions: function declarations, function expressions, and arrow functions. Each has its own syntax and behavior.

Can you explain function declarations and function expressions?

Sure! A function declaration is defined using the function keyword followed by a name, while a function expression can be anonymous and is defined as part of an expression, often assigned to a variable.

What about arrow functions? How are they different?

Arrow functions are a more concise syntax for writing functions. They do not have their own this context, which makes them useful for certain situations, like callbacks.

Are there any performance differences between these types?

Generally, the performance differences are negligible for most applications. However, arrow functions can be slightly faster in certain scenarios due to their simpler syntax.