Do all functions have to have a name?

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In this code, I was just wondering why the function doesn't have a name, and why does it end with a semicolon }; instead of just a curly bracket }

window.onload = function() {
    var x = document.getElementById("demo");
    x.style.color = '#6600FF';
    x.style.width = '100px';
};

What I have tried:

I also tried adding a name to the function, and it gave the same answer so I'm guessing it's optional?

Posted 3-Dec-17 4:33am

Member 13502831

Updated 3-Dec-17 5:19am

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Dave Kreskowiak · Answer 1 · 2017-12-03T05:19:00

Solution 1

It's called an "anonymous" function[^]. Since it's being assigned to an onload event, this is possible.

The semicolon needs to be there because this is an assignment statement, not really the definition of a function. All assignment statements must end with a semicolon.

Posted 3-Dec-17 5:19am

Dave Kreskowiak