When is it proper to add a return at the end of a JavaScript function?

Question

I have seen some developers place a return at the end of their JavaScript functions like this:

$(".items").each(function(){
    mthis = $(this);
    var xposition = some .x() position value;
    if(xposition < 0){
        mthis.remove();
        return;
    }
});

Is having a return even necessary? I know that return false cancels out of a loop early and I know that return x, returns a value, but having just return??? What does that mean?

Sorry - I forgot to put an end } at the very end of the code. the return is in the if conditional.

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New Update - just discovered that the intent of the loop was to cancel out the nth .item that entered the loop. so return false is my replacement for a simple return; (which means undefined anyway). Thanks everyone for the help!

Answer 1

Having return with not proceeding it at the end of the function doesn't really do anything. Returning "this" however allows for method chaining.