Node.compareDocumentPosition

最新推荐文章于 2024-03-20 05:20:15 发布

iteye_3607

最新推荐文章于 2024-03-20 05:20:15 发布

阅读量144

点赞数

本文深入解析了MDN文档中关于Node.compareDocumentPosition的方法，详细解释了其语法、返回值及其用法示例。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

来源：https://developer.mozilla.org/en/DOM/Node.compareDocumentPosition

Summary

Compares the position of the current node against another node in any other document.

Syntax

node.compareDocumentPosition( otherNode )

nodeis the node that's being compared.
otherNodeis the node that's being compared against.

The return value is computed as the relationship thatotherNodehas withnode.

Notes

The return value is a bitmask with the following values:

DOCUMENT_POSITION_DISCONNECTED = 1;
DOCUMENT_POSITION_PRECEDING    = 2;
DOCUMENT_POSITION_FOLLOWING    = 4;
DOCUMENT_POSITION_CONTAINS     = 8;
DOCUMENT_POSITION_CONTAINED_BY = 16;

Example

var head = document.getElementsByTagName('head').item(0);
var result = head.compareDocumentPosition(document.body);
// result = head.DOCUMENT_POSITION_FOLLOWING