Node.ownerDocument 唯讀屬性會回傳一個此節點所屬的的頂層 document 物件。


document = element.ownerDocument
  • document is the document object parent of the current element.


// given a node "p", get the top-level HTML child
// of the document object

var d = p.ownerDocument;
var html = d.documentElement;


The document object returned by this property is the main object with which all the child nodes in the actual HTML document are created. If this property is used on a node that is itself a document, the result is null.



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Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes)[1] 6.0[2] (Yes) ?
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? (Yes)[1] ? ? ?

[1] Starting in Gecko 9.0 (Firefox 9.0 / Thunderbird 9.0 / SeaMonkey 2.6), the ownerDocument of doctype nodes (that is, nodes for which Node.nodeType is Node.DOCUMENT_TYPE_NODE or 10) is no longer null. Instead, the ownerDocument is the document on which document.implementation.createDocumentType() was called.