jquery get elements by class code example

Example 1: find class using jquery

var myVar = $("#start").find('.myClass').val();

Example 2: jquery find tag and class

$(".txtClass")                  =>  getElementsByClassName()

$("#childDiv2 .txtClass")       =>  getElementById(),
                                    then getElementsByClassName()

$("#childDiv2 > .txtClass")     =>  getElementById(),
                                    then iterate over children and check class

$("input.txtClass")             =>  getElementsByTagName(),
                                    then iterate over results and check class

$("#childDiv2 input.txtClass")  =>  getElementById(),
                                    then getElementsByTagName(),
                                    then iterate over results and check class

Example 3: how to find a name of class from page in jquery

$("input[type='submit']").click(function() {
    if ($(".Mandatory").length > 0) {
        // Do some code here
    }
});