本文详细解析了Node::attach()与Element::attach()方法的实现原理，包括递归深度优先遍历、创建渲染器及解决元素样式等问题。通过图表直观展示了方法执行流程与涉及对象之间的关系。
How a DOM Element is Attached
The implementation of Node::attach() is just a recursive depth-first traversal. However,Element::attach() does a bit more, also creating a renderer (if necessary) and resolving style for the element.
This diagram illustrates how it happens, showing relationships between the objects involved.
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