Question

why import classes if they work even if you don’t?

import flash.display.Sprite;
import flash.events.MouseEvent;

var circle1:Sprite = new Sprite();
circle1.graphics.beginFill(0xFFCC00);
circle1.graphics.drawCircle(40, 40, 40);
circle1.buttonMode = true;
circle1.addEventListener(MouseEvent.CLICK, clicked);

why are we ment to import classes if the code is working anyways? if the two import lines are escaped the code will still be working

Answer 1

If the code is compiled as strict, it needs those imports. Unless the instances are decalred as fully qualified class names.

e.g.

var circle1:flash.display.Sprite = new flash.display.Sprite(); 

Which I’m sure you don’t want to do 😉

I’d always recommend compiling in strict mode anyway, and making sure that your code is properly typed and has the required references (imports).