BASE element | base object (Windows)

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Specifies an explicit URL used to resolve links and references to external sources such as images and style sheets.

DOM Information

Inheritance Hierarchy

Node

Element

HTMLElement

base

Members

The base object has these types of members:

Events
Methods
Properties

Events

The base object has these events.

Event	Description
abort	Fires when the user aborts the download.
change	Fires when the contents of the object or selection have changed.
error	Fires when an error occurs during object loading.
input	Occurs when the text content of an element is changed through the user interface.
load	Fires immediately after the client loads the object.
mouseenter	Fires when the user moves the mouse pointer into the object.
mouseleave	Fires when the user moves the mouse pointer outside the boundaries of the object.
onselect	Fires when the current selection changes.
readystatechange	Fires when the state of the object has changed.
reset	Fires when the user resets a form.
resize	Fires when the size of the object is about to change.

Methods

The base object has these methods.

Method	Description
applyElement	Makes the element either a child or parent of another element.
clearAttributes	Removes all attributes and values from the object.
cloneNode	Copies a reference to the object from the document hierarchy.
componentFromPoint	Returns the component located at the specified coordinates via certain events.
doScroll	Simulates a click on a scroll bar component.
getAdjacentText	Returns the adjacent text string.
getAttribute	Retrieves the value of the specified attribute.
getAttributeNode	Retrieves an attribute object referenced by the attribute.name property.
getAttributeNodeNS	Gets an attribute object that matches the specified namespace and name.
getAttributeNS	Gets the value of the specified attribute within the specified namespace.
getBoundingClientRect	Retrieves an object that specifies the bounds of a collection of TextRectangle objects.
getClientRects	Retrieves a collection of rectangles that describes the layout of the contents of an object or range within the client. Each rectangle describes a single line.
getElementsByClassName	Gets a collection of objects that are based on the value of the class attribute.
getElementsByTagName	Retrieves a collection of objects based on the specified element name.
getElementsByTagNameNS	Gets a collection of objects that are based on the specified element names within a specified namespace.
hasAttribute	Determines whether an attribute with the specified name exists.
hasAttributeNS	Determines whether an attribute that has the specified namespace and name exists.
hasAttributes	Determines whether one or more attributes exist for the object.
hasChildNodes	Returns a value that indicates whether the object has children.
insertAdjacentElement	Inserts an element at the specified location.
mergeAttributes	Copies all read/write attributes to the specified element.
msMatchesSelector	Determines whether an object matches the specified selector.
normalize	Merges adjacent DOM objects to produce a normalized document object model.
removeAttribute	Removes an attribute from an object.
removeAttributeNode	Removes an attribute object from the object.
removeAttributeNS	Removes the specified attribute from the object.
removeNode	Removes the object from the document hierarchy.
replaceAdjacentText	Replaces the text adjacent to the element.
replaceNode	Replaces the object with another element.
setActive	Sets the object as active without setting focus to the object.
setAttribute	Sets the value of the specified attribute.
setAttributeNode	Sets an attribute object node as part of the object.
setAttributeNodeNS	Sets an attribute object as part of the object.
setAttributeNS	Sets the value of the specified attribute within the specified namespace.
setCapture	Sets the mouse capture to the object that belongs to the current document.
swapNode	Exchanges the location of two objects in the document hierarchy.

Properties

The base object has these properties.

Property	Description
attributes	Retrieves a collection of attributes of the object.
canHaveChildren	Gets a value indicating whether the object can contain child objects.
canHaveHTML	Retrieves the value indicating whether the object can contain rich HTML markup.
childElementCount	Retrieves the number of immediate child nodes of the current element or a zero if the element does not contain any child nodes. childElementCount does not return all child nodes, only child nodes that are nodeType =1, or element nodes.
constructor	Returns a reference to the constructor of an object.
firstChild	Gets a reference to the first child in the childNodes collection of the object.
firstElementChild	Retrieves a reference to the first child element, or null if there are no child elements.
href	Gets or sets the baseline URL on which relative links are based.
id	Sets or retrieves the string identifying the object.
isContentEditable	Gets the value that indicates whether the user can edit the contents of the object.
isDisabled	Gets the value that indicates whether the user can interact with the object.
isMultiLine	Retrieves the value indicating whether the content of the object contains one or more lines.
lastChild	Gets a reference to the last child in the childNodes collection of an object.
lastElementChild	Retrieves a reference to the last child element or null if there are no child elements.
nextElementSibling	Retrieves a reference to the sibling element that immediately follows or null if the element does not have any sibling elements that follow it.
nextSibling	Retrieves a reference to the next child of the parent for the object.
nodeName	Gets the name of a particular type of node.
nodeType	Retrieves the type of the requested node.
nodeValue	Gets or sets the value of a node.
ownerDocument	Retrieves the document object associated with the node.
parentNode	Retrieves the parent object in the document hierarchy.
previousElementSibling	Retrieves a reference to the immediately preceding sibling element or null if the element does not have any preceding siblings.
previousSibling	Gets a reference to the previous child of the parent for the object.
readyState	Retrieves the current state of the object.
role	Sets or retrieves the role for this element.
target	Sets or retrieves the window or frame at which to target content.
uniqueID	Retrieves an autogenerated, unique identifier for the object.

Standards information

HTML 4.01 Specification, Section 12.4

Remarks

When used, the base element must appear within the head of the document, before any elements that refer to an external source.

If more than one base element occurs, only the first element will be recognized.

Examples


<html>
<head>
  <base href="http://msdn.microsoft.com/workshop/author/dhtml/reference/"/>
</head>
<body>
Click <a href="properties/href_2.asp">here</a> to learn about the 
href property.
</body>
</html>

This example retrieves the base URL from the document if a valid base element is specified in the document. Otherwise, the function returns null.


<script type="text/javascript">
function GetBase()
{
    var oBaseColl = document.all.tags('BASE');
    return ( (oBaseColl && oBaseColl.length) ? oBaseColl[0].href : 
        null );
}
</script>

Build date: 11/28/2012

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