append class in jquery code example

Example 1: jquery addclass

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

Example 2: addclass jquery

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

Example 3: jquery addclass

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

Example 4: javascript add class to element

var someElement= document.getElementById("myElement");
    someElement.className += " newclass";//add "newclass" to element (space in front is important)