Yahoo! UI Library

dom  2.5.1

Yahoo! UI Library > dom > YAHOO.util.Dom

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Class YAHOO.util.Dom

Provides helper methods for DOM elements.

Methods

addClass

Boolean | Array addClass ( el , className )
Adds a class name to a given element or collection of elements.
Parameters:
el <String | HTMLElement | Array> The element or collection to add the class to
className <String> the class name to add to the class attribute
Returns: Boolean | Array
A pass/fail boolean or array of booleans

batch

Any | Array batch ( el , method , o , override )
Runs the supplied method against each item in the Collection/Array. The method is called with the element(s) as the first arg, and the optional param as the second ( method(el, o) ).
Parameters:
el <String | HTMLElement | Array> (optional) An element or array of elements to apply the method to
method <Function> The method to apply to the element(s)
o <Any> (optional) An optional arg that is passed to the supplied method
override <Boolean> (optional) Whether or not to override the scope of "method" with "o"
Returns: Any | Array
The return value(s) from the supplied method

generateId

String | Array generateId ( el , prefix )
Returns an ID and applies it to the element "el", if provided.
Parameters:
el <String | HTMLElement | Array> (optional) An optional element array of elements to add an ID to (no ID is added if one is already present).
prefix <String> (optional) an optional prefix to use (defaults to "yui-gen").
Returns: String | Array
The generated ID, or array of generated IDs (or original ID if already present on an element)

get

HTMLElement | Array get ( el )
Returns an HTMLElement reference.
Parameters:
el <String | HTMLElement |Array> Accepts a string to use as an ID for getting a DOM reference, an actual DOM reference, or an Array of IDs and/or HTMLElements.
Returns: HTMLElement | Array
A DOM reference to an HTML element or an array of HTMLElements.

getAncestorBy

Object getAncestorBy ( node , method )
Returns the nearest ancestor that passes the test applied by supplied boolean method. For performance reasons, IDs are not accepted and argument validation omitted.
Parameters:
node <HTMLElement> The HTMLElement to use as the starting point
method <Function> - A boolean method for testing elements which receives the element as its only argument.
Returns: Object
HTMLElement or null if not found

getAncestorByClassName

Object getAncestorByClassName ( node , className )
Returns the nearest ancestor with the given className.
Parameters:
node <String | HTMLElement> The HTMLElement or an ID to use as the starting point
className <String>
Returns: Object
HTMLElement

getAncestorByTagName

Object getAncestorByTagName ( node , tagName )
Returns the nearest ancestor with the given tagName.
Parameters:
node <String | HTMLElement> The HTMLElement or an ID to use as the starting point
tagName <String>
Returns: Object
HTMLElement

getChildren

Array getChildren ( node )
Returns an array of HTMLElement childNodes.
Parameters:
node <String | HTMLElement> The HTMLElement or an ID to use as the starting point
Returns: Array
A static array of HTMLElements

getChildrenBy

Array getChildrenBy ( node , method )
Returns an array of HTMLElement childNodes that pass the test method.
Parameters:
node <HTMLElement> The HTMLElement to start from
method <Function> A boolean function used to test children that receives the node being tested as its only argument
Returns: Array
A static array of HTMLElements

getClientHeight

Int getClientHeight ( )
Returns the height of the client (viewport).
Returns: Int
The height of the viewable area of the page.
Deprecated Now using getViewportHeight. This interface left intact for back compat.

getClientRegion

Region getClientRegion ( )
Creates a Region based on the viewport relative to the document.
Returns: Region
A Region object representing the viewport which accounts for document scroll

getClientWidth

Int getClientWidth ( )
Returns the width of the client (viewport).
Returns: Int
The width of the viewable area of the page.
Deprecated Now using getViewportWidth. This interface left intact for back compat.

getDocumentHeight

Int getDocumentHeight ( )
Returns the height of the document.
Returns: Int
The height of the actual document (which includes the body and its margin).

getDocumentScrollLeft

Int getDocumentScrollLeft ( document )
Returns the left scroll value of the document
Parameters:
document <HTMLDocument> (optional) The document to get the scroll value of
Returns: Int
The amount that the document is scrolled to the left

getDocumentScrollTop

Int getDocumentScrollTop ( document )
Returns the top scroll value of the document
Parameters:
document <HTMLDocument> (optional) The document to get the scroll value of
Returns: Int
The amount that the document is scrolled to the top

getDocumentWidth

Int getDocumentWidth ( )
Returns the width of the document.
Returns: Int
The width of the actual document (which includes the body and its margin).

getElementsBy

Array getElementsBy ( method , tag , root , apply )
Returns a array of HTMLElements that pass the test applied by supplied boolean method. For optimized performance, include a tag and/or root node when possible.
Parameters:
method <Function> - A boolean method for testing elements which receives the element as its only argument.
tag <String> (optional) The tag name of the elements being collected
root <String | HTMLElement> (optional) The HTMLElement or an ID to use as the starting point
apply <Function> (optional) A function to apply to each element when found
Returns: Array
Array of HTMLElements

getElementsByClassName

Array getElementsByClassName ( className , tag , root , apply )
Returns a array of HTMLElements with the given class. For optimized performance, include a tag and/or root node when possible.
Parameters:
className <String> The class name to match against
tag <String> (optional) The tag name of the elements being collected
root <String | HTMLElement> (optional) The HTMLElement or an ID to use as the starting point
apply <Function> (optional) A function to apply to each element when found
Returns: Array
An array of elements that have the given class name

getFirstChild

Object getFirstChild ( node )
Returns the first HTMLElement child.
Parameters:
node <String | HTMLElement> The HTMLElement or an ID to use as the starting point
Returns: Object
HTMLElement or null if not found

getFirstChildBy

Object getFirstChildBy ( node , method )
Returns the first HTMLElement child that passes the test method.
Parameters:
node <HTMLElement> The HTMLElement to use as the starting point
method <Function> A boolean function used to test children that receives the node being tested as its only argument
Returns: Object
HTMLElement or null if not found

getLastChild

Object getLastChild ( node )
Returns the last HTMLElement child.
Parameters:
node <String | HTMLElement> The HTMLElement or an ID to use as the starting point
Returns: Object
HTMLElement or null if not found

getLastChildBy

Object getLastChildBy ( node , method )
Returns the last HTMLElement child that passes the test method.
Parameters:
node <HTMLElement> The HTMLElement to use as the starting point
method <Function> A boolean function used to test children that receives the node being tested as its only argument
Returns: Object
HTMLElement or null if not found

getNextSibling

Object getNextSibling ( node )
Returns the next sibling that is an HTMLElement
Parameters:
node <String | HTMLElement> The HTMLElement or an ID to use as the starting point
Returns: Object
HTMLElement or null if not found

getNextSiblingBy

Object getNextSiblingBy ( node , method )
Returns the next HTMLElement sibling that passes the boolean method. For performance reasons, IDs are not accepted and argument validation omitted. Returns the nearest HTMLElement sibling if no method provided.
Parameters:
node <HTMLElement> The HTMLElement to use as the starting point
method <Function> A boolean function used to test siblings that receives the sibling node being tested as its only argument
Returns: Object
HTMLElement or null if not found

getPreviousSibling

Object getPreviousSibling ( node )
Returns the previous sibling that is an HTMLElement
Parameters:
node <String | HTMLElement> The HTMLElement or an ID to use as the starting point
Returns: Object
HTMLElement or null if not found

getPreviousSiblingBy

Object getPreviousSiblingBy ( node , method )
Returns the previous sibling that is an HTMLElement. For performance reasons, IDs are not accepted and argument validation omitted. Returns the nearest HTMLElement sibling if no method provided.
Parameters:
node <HTMLElement> The HTMLElement to use as the starting point
method <Function> A boolean function used to test siblings that receives the sibling node being tested as its only argument
Returns: Object
HTMLElement or null if not found

getRegion

Region | Array getRegion ( el )
Returns the region position of the given element. The element must be part of the DOM tree to have a region (display:none or elements not appended return false).
Parameters:
el <String | HTMLElement | Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
Returns: Region | Array
A Region or array of Region instances containing "top, left, bottom, right" member data.

getStyle

String | Array getStyle ( el , property )
Normalizes currentStyle and ComputedStyle.
Parameters:
el <String | HTMLElement |Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
property <String> The style property whose value is returned.
Returns: String | Array
The current value of the style property for the element(s).

getViewportHeight

Int getViewportHeight ( )
Returns the current height of the viewport.
Returns: Int
The height of the viewable area of the page (excludes scrollbars).

getViewportWidth

Int getViewportWidth ( )
Returns the current width of the viewport.
Returns: Int
The width of the viewable area of the page (excludes scrollbars).

getX

Number | Array getX ( el )
Gets the current X position of an element based on page coordinates. The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
Parameters:
el <String | HTMLElement | Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
Returns: Number | Array
The X position of the element(s)

getXY

Array getXY ( el )
Gets the current position of an element based on page coordinates. Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
Parameters:
el <String | HTMLElement | Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
Returns: Array
The XY position of the element(s)

getY

Number | Array getY ( el )
Gets the current Y position of an element based on page coordinates. Element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
Parameters:
el <String | HTMLElement | Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
Returns: Number | Array
The Y position of the element(s)

hasClass

Boolean | Array hasClass ( el , className )
Determines whether an HTMLElement has the given className.
Parameters:
el <String | HTMLElement | Array> The element or collection to test
className <String> the class name to search for
Returns: Boolean | Array
A boolean value or array of boolean values

inDocument

Boolean inDocument ( el )
Determines whether an HTMLElement is present in the current document.
Parameters:
el <String | HTMLElement> The element to search for
Returns: Boolean
Whether or not the element is present in the current document

insertAfter

HTMLElement insertAfter ( newNode , referenceNode )
Inserts the new node as the next sibling of the reference node
Parameters:
newNode <String | HTMLElement> The node to be inserted
referenceNode <String | HTMLElement> The node to insert the new node after
Returns: HTMLElement
The node that was inserted (or null if insert fails)

insertBefore

HTMLElement insertBefore ( newNode , referenceNode )
Inserts the new node as the previous sibling of the reference node
Parameters:
newNode <String | HTMLElement> The node to be inserted
referenceNode <String | HTMLElement> The node to insert the new node before
Returns: HTMLElement
The node that was inserted (or null if insert fails)

isAncestor

Boolean isAncestor ( haystack , needle )
Determines whether an HTMLElement is an ancestor of another HTML element in the DOM hierarchy.
Parameters:
haystack <String | HTMLElement> The possible ancestor
needle <String | HTMLElement> The possible descendent
Returns: Boolean
Whether or not the haystack is an ancestor of needle

removeClass

Boolean | Array removeClass ( el , className )
Removes a class name from a given element or collection of elements.
Parameters:
el <String | HTMLElement | Array> The element or collection to remove the class from
className <String> the class name to remove from the class attribute
Returns: Boolean | Array
A pass/fail boolean or array of booleans

replaceClass

Boolean | Array replaceClass ( el , oldClassName , newClassName )
Replace a class with another class for a given element or collection of elements. If no oldClassName is present, the newClassName is simply added.
Parameters:
el <String | HTMLElement | Array> The element or collection to remove the class from
oldClassName <String> the class name to be replaced
newClassName <String> the class name that will be replacing the old class name
Returns: Boolean | Array
A pass/fail boolean or array of booleans

setStyle

void setStyle ( el , property , val )
Wrapper for setting style properties of HTMLElements. Normalizes "opacity" across modern browsers.
Parameters:
el <String | HTMLElement | Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
property <String> The style property to be set.
val <String> The value to apply to the given property.
Returns: void

setX

void setX ( el , x )
Set the X position of an html element in page coordinates, regardless of how the element is positioned. The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
Parameters:
el <String | HTMLElement | Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
x <Int> The value to use as the X coordinate for the element(s).
Returns: void

setXY

void setXY ( el , pos , noRetry )
Set the position of an html element in page coordinates, regardless of how the element is positioned. The element(s) must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
Parameters:
el <String | HTMLElement | Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements
pos <Array> Contains X & Y values for new position (coordinates are page-based)
noRetry <Boolean> By default we try and set the position a second time if the first fails
Returns: void

setY

void setY ( el , x )
Set the Y position of an html element in page coordinates, regardless of how the element is positioned. The element must be part of the DOM tree to have page coordinates (display:none or elements not appended return false).
Parameters:
el <String | HTMLElement | Array> Accepts a string to use as an ID, an actual DOM reference, or an Array of IDs and/or HTMLElements.
x <Int> To use as the Y coordinate for the element(s).
Returns: void

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