摘要： 文档碎片是什么http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-B63ED1A3DocumentFragment is a "lightweight" or "minimal" Document object. It is very common to want to be able to extract a portion of a document's tree or to create a new fragment of a document参考标准的描述，Documen 阅读全文