how to add class by jquery code example

Example 1: jquery add class

$('some_element').addClass('some-class');

// You can add more than one class at one time
$('some_element').addClass('some-class another-class yet-another-class');

// Even thought jQuery allows you to do this
$('some_element').addClass('some-class').addClass('another-class').addClass('yet-another-class');

// That would be really wasteful, think of the planet!
// But more importantly, your RAM
// oh and those poor folks who be viewing your website

Example 2: jquery addclass

$("#elem").addClass("classname");

Example 3: jquery addclass

$( "p" ).addClass( "myClass yourClass" );

Example 4: jquery addclass

$( "p" ).removeClass( "myClass noClass" ).addClass( "yourClass" );