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JavaScript

Posted by Tom Lawrence
Tom Lawrence
8,685 Points

Methods ()

Hi,

Any tips on working out what goes between the () in a method?

The vids so far tell you what to put in them, but when i check W3c to read more about a method its not always clear on what it can take between the ()

Any tips?

4 Answers

Dino Paškvan
Dino Paškvan
Courses Plus Student 44,107 Points

What you are asking about are parameters that a function/method can take. There is no sure way to guess what parameters (if any) a function will take. You will have to take a look at the documentation for a particular function to see what parameters it takes.

Thankfully, when it comes to built-in objects/functions/methods, Mozilla provides great documentation for everything you might need, including what parameters functions take.

With enough practice, you'll soon know by heart what parameters commonly-used functions take.

Tom Lawrence
Tom Lawrence
8,685 Points
Tom Lawrence
Tom Lawrence
8,685 Points

Oh i see that link makes it nice and clear.

Can a method be passed data then?

I was editing my post and my reply got out of order..

Tom Lawrence
Tom Lawrence
8,685 Points
Tom Lawrence
Tom Lawrence
8,685 Points

Oh i see that link makes it nice and clear.

Can a method be passed data then?

Dino Paškvan
Dino Paškvan
Courses Plus Student 44,107 Points

A function is a re-usable piece of code that turns input(s) into an output, or does something (also called a side effect). A method is a function that has been defined on a particular object.

In JavaScript the distinction is somewhat moot as all built-in functions are defined on objects, if none other, then the global window object.

Dino Paškvan
Dino Paškvan
Courses Plus Student 44,107 Points

Yes, a method acts the same way as a function. The only distinction is that you'd call a function like this: myFunction(someParameter); and a method like this: someObject.myMethod(someParameter);.

Tom Lawrence
Tom Lawrence
8,685 Points
Tom Lawrence
Tom Lawrence
8,685 Points

thanks for clearing that up for me