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Traversing through filtering

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Traversing through filtering


Traversing through filtering

Using jQuery, you can traverse through different elements of a web page-randomly or sequentially. JQuery have methods for random selection of element. Also it has method for sequential selection. These methods filter out the element from a html page based on the given conditions.

You can traverse element :

  • Traversing through filtering.
  • Miscellaneous Traversing
  • Tree traversal.

Traversing through filtering

Finding element by filtering has following methods :

  . eq() Find Elements by index $("li").eq(2).addClass("drop");
 .filter()   The filter( selector ) method can be used to filter out all elements
from the set of matched elements that do not match the specified
  .first() Reduce the set of matched elements to the first in the set. ('li').first().css('background-color', 'green');
  .has()  Reduce the set of matched elements to those that have a
descendant that matches the selector or DOM element.
  .is()  Check the current matched set of elements against a selector and
 return true if at least one of these elements matches the selector.
if ($(this).is(":first-child")) {}
  .last() Reduce the set of matched elements to the final one in the set. $("p span").last().addClass('highlight')
 .map()  Translate a set of elements in the jQuery object into another set of
values in a jQuery array (which may, or may not contain elements).
We can get the sum of the values of the checked inputs:

var sum = 0;
$('input:checked').map(function() {
return sum += (this.value * 1);
 .not()  Remove elements from the set of matched elements. $('li').not(':even').css('background-color', 'red');
 .slice()  Selects a subset of the matched elements. Selects all paragraphs, then slices the selection to include
 only the first element.
$("p").slice(0, 1).wrapInner("<b></b>");

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