how to animate in jquery code example

Example 1: jquery animation

$( "#clickme" ).click(function() {
  $( "#book" ).animate({
    opacity: 0.25,
    left: "+=50",
    height: "toggle"
  }, 5000, function() {
    // Animation complete.
  });
});

Example 2: animate in jquery

$("button").click(function(){

  $("#box").animate({height: "300px"});

});