DOM parentNode和parentElement之间的区别 [英] Difference between DOM parentNode and parentElement
问题描述
parentElement Firefox 9和DOM4，但它已经存在于所有其他主流浏览器中。
在大多数情况下，它与 parentNode 。唯一的区别是当节点的 parentNode 不是元素时。如果是这样， parentElement 是 null 。
示例：
document.body.parentNode; //< html>元素
document.body.parentElement; //< html>元素
document.documentElement.parentNode; //文档节点
document.documentElement.parentElement; // null
由于< html> 元素（ document.documentElement ）没有父元素是一个元素， parentElement 是空。 （还有其他更不可能的情况，其中 parentElement 可以是 null ，但是你可能永远不会遇到他们。）
Can somebody in explain me in as simple as possible terms, what is the difference between classical DOM parentNode and newly introduced in Firefox 9 parentElement
parentElement is new to Firefox 9 and to DOM4, but it has been present in all other major browsers for ages.
In most cases, it is the same as parentNode. The only difference comes when a node's parentNode is not an element. If so, parentElement is null.
As an example:
document.body.parentNode; // the <html> element
document.body.parentElement; // the <html> element
document.documentElement.parentNode; // the document node
document.documentElement.parentElement; // null
Since the <html> element (document.documentElement) doesn't have a parent that is an element, parentElement is null. (There are other, more unlikely, cases where parentElement could be null, but you'll probably never come across them.)
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