nodeType的定义

在《网页制作完全手册》里，nodeType的值只提到了两个，

写道

1 Element node.
3 Text node.

 

实际上，我们在读js代码的时候，经常碰到nodeType还有其他值的情况：

if (elem.nodeType !== 8) {
  first[pos++] = elem;
}

 由于我手里的《网页制作完全手册》是微软出版的，难免有不全的地方。有需要的朋友，可以参考w3c提供的《1. Document Object Model Core》中的Interface Node一节：

IDL Definition 写道

// NodeType
const unsigned short ELEMENT_NODE                              = 1;
const unsigned short ATTRIBUTE_NODE                            = 2;
const unsigned short TEXT_NODE                                     = 3;
const unsigned short CDATA_SECTION_NODE                  = 4;
const unsigned short ENTITY_REFERENCE_NODE              = 5;
const unsigned short ENTITY_NODE                                  = 6;
const unsigned short PROCESSING_INSTRUCTION_NODE = 7;
const unsigned short COMMENT_NODE                              = 8;
const unsigned short DOCUMENT_NODE                            = 9;
const unsigned short DOCUMENT_TYPE_NODE                   = 10;
const unsigned short DOCUMENT_FRAGMENT_NODE          = 11;
const unsigned short NOTATION_NODE                              = 12;