Tree traversal
Tree traversal
Tree traversal have following method :
.children()
This method get a set of elements containing all of the unique immediate children of each of the matched set of elements.
Example :
$("div").children(".selected").css("color", "blue");
It finds all children with a class "selected" of each div.
.closest( )
This method get a set of elements containing the closest parent element that matches the specified selector, the starting element included.
Example :
$('li.item-a').closest('ul').css('background-color', 'red');
This will change the background color of the closest "ul" .
.find( )
This method searches for descendent elements that match the specified selectors.
Example :
<script>$("p").find("span").css('color',' blue');</script>
.next()
This method get a set of elements containing the unique next siblings of each of the given set of elements.
Example :
$("p").next(".selected").css("background", "yellow");
It finds the very next sibling of each paragraph. Keep only the ones with a class "selected".
.nextAll()
This method is used to find all sibling elements after the current element.
Example :
$('li.third-item').nextAll().css('background-color', 'red');
.nextUntil()
It finds all sibling elements after the current element.
Example : Consider the following code :
<dl> <dt>term 1</dt> <dd>definition 1-a</dd> <dd>definition 1-b</dd> <dd>definition 1-c</dd> <dd>definition 1-d</dd> <dt id="term-2">term 2</dt> <dd>definition 2-a</dd> <dd>definition 2-b</dd> <dd>definition 2-c</dd> <dt>term 3</dt> <dd>definition 3-a</dd> <dd>definition 3-b</dd> </dl> |
Below Script can find the elements which come after second term until a
following <dt>
.
$('#term-2').nextUntil('dt').css('background-color', 'red'); |
.offsetParent() 0
This method get the closest ancestor element that is positioned. The
.offsetParent()
method allows us to search through the ancestors of these
elements in the DOM tree and construct a new jQuery object wrapped around the
closest positioned ancestor.
Example :
Consider the following code : 1
<ul class="Brother-1"> |
The below script finds the offsetParent of item "A." : 2
<script>$('li.item-a').offsetParent().css('background-color', 'red');</script>
This will change the color of list item II, which is positioned.
.parent( ) 3
This method get the direct parent of an element.
Example :
It will find the parent element of each paragraph with a class "selected". 4
<script>$("p").parent(".selected").css("background", "yellow");</script>
.parents( )
This method gets the ancestors of each element in the current set of matched elements. 5
Example :
$('li.child-a').parents().css('background-color', 'red') ;
.parentsUntil() 6
Example :
Consider the following code: 7
<ul class="Brother-1"> |
The script below change the red background for the level-2 list and the item II.
$('li.item-a').parentsUntil('.level-1').css('background-color', 'red');
.prev( ) 8
This method will get the immediately preceding sibling of each element in the set of matched elements.
Example :
$('li.third-item').prev().css('background-color', 'red');.prevAll()
This method will get all preceding sibling of each element in the set of matched elements.
Example :
Consider the following code :
<ul> |
The following script changes red background behind Node 1 and Node 2.
$('li.third-item').prevAll().css('background-color', 'red');
.prevUntil( ) 0
This method gets all preceding siblings of each element up to the provided 'selector'.
Example:
('#term-2').prevUntil('dt').css('background-color', 'red');
1
This will get all the elements before "term-2" until it would not get "dt" .
.siblings( )
This method gets the siblings of each element in the set of matched elements. 2
Example :
$("p").siblings(".selected").css("background", "yellow");
It finds all siblings with a class "selected" of each 'p'. 3
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