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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.


Specification Status Comment
The definition of 'Node.ownerDocument' in that specification.
Document Object Model (DOM) Level 3 Core Specification
The definition of 'Node.ownerDocument' in that specification.
Obsolete No change
Document Object Model (DOM) Level 2 Core Specification
The definition of 'Node.ownerDocument' in that specification.
Obsolete Initial definition


We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

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.

[2] http://msdn.microsoft.com/en-us/library/ie/ms534315(v=vs.85).aspx


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