Even though they fill similar needs, they have a few critical differences that can fundamentally influence how you use them in your code. Learn all about several differences between arrow functions and regular functions.
On the other hand, defining a regular function requires the use of the function keyword, with a more verbose syntax.
Regular functions are more useful for complex syntax requiring multiple statements or expressions. In contrast, arrow functions use a more concise syntax that can make your code easier to read and understand.
In scoping, how arrow functions handle the this keyword differs significantly from how normal functions do. Regular functions define the this keyword themselves; therefore, it can change depending on the context in which you invoke the function.
On the other hand, because they do not specify the this keyword, arrow functions use the same this as the static scope surrounding them.
Function binding is the term used to describe the relationship between this keyword and functions in your code. The variations in function binding between arrow functions and normal functions can strongly impact how you construct and use arrow functions.
Using the this keyword makes it unique in regular functions and associates with various objects based on the method used to call the function. Function binding is one of the most important distinctions between regular and arrow functions.
In contrast, arrow functions do not have this keyword; rather, they get it from the surrounding scopes.
Arrow function have an implicit return feature. If the function body consists of one single expression, the functions returns that expression.