Separating Conditionals in JavaScript Functions #2 | Clean Code Tutorial

Key Takeaways

all right encapsulating conditionals this is our challenge for that you can see here we just have this sort of get loading state that passes along some string based on what's happening it's not really important what we're looking at here is that we have maybe some if statements that are a little complex right they have three different inputs and you may perhaps look at this and say hey i could swap in a variable or depending on the complexity you might swap in a function to encapsulate it either one would do we're going to practice a little bit here by encapsulating our conditionals and functions go ahead and practice writing some functions here that are going to be descriptive enough to encapsulate the logic that's in those if brackets were able to do it let's go ahead and give it a shot so this is saying hey if a user exists with a double bang right and it is in fact loading and doesn't have an error go ahead and return finish loading so how might we write that well we'd have a function and it could say it has user loaded maybe successfully that sounds good here we'll just take the state object and then we simply can return what's here this over in a more real world scenario you might have something more complicated than this but i'd probably store this in a variable but we can do it here with our function so has user loaded successfully go ahead put that in there very descriptive pass the state cool now maybe this one you know we'll say user is still loading function is user loading we'll pass the state here and we'll go ahead and copy and you know what this should also be successfully because that leaves out this last part we'll return is user loading successfully that function sound method because it's not in the class it has to stay in here now you can see we kind of have two methods one say that it has loaded one that it is loading and it makes it a little bit more descriptive as well as encapsulate some of this logic because really what we want to do is get the loading state in these sort of sub sections we've broken out