This documentation is intended to provide developers with a guide to developing rendering objects.

Tips and Techniques

• Your implementation of RenderObject::layout() should guarantee that object and its descendants do not need any layout when you leave the method.
• In your RenderObject::layout() method, add a ASSERT(needsLayout()) at the beginning and a setNeedsLayout(false) at the end.
• If your render object needs to access DOM attributes and use them to set properties or construct other objects in the tree, you need to use mapped attributes or updateFromElement to control such behavior.