Document.documentElement

Document.documentElement 會回傳目前文件(document)中的根元素(Element),如:HTML 文件中的 <html> 元素。

語法

var element = document.documentElement;

範例

var rootElement = document.documentElement;
var firstTier = rootElement.childNodes;

// firstTier is the NodeList of the direct children of the root element
for (var i = 0; i < firstTier.length; i++) {
   // do something with each direct kid of the root element
   // as firstTier[i]
}

備註

對於所有非空的 HTML 文件, document.documentElement 將會是一個 <html>  元素 ; 對於所有非空的 XML 文件,document.documentElement 則會是文件的根元素。

規範

規範 狀態  備註
Document Object Model (DOM) Level 2 Core Specification
The definition of 'Document.documentElement' in that specification.
Obsolete  
Document Object Model (DOM) Level 3 Core Specification
The definition of 'Document.documentElement' in that specification.
Obsolete  
DOM4
The definition of 'Document.documentElement' in that specification.
Obsolete  
DOM
The definition of 'Document.documentElement' in that specification.
Living Standard