纯JS代码实现气泡效果

<script type="text/javascript" src="js/jquery.min.js"></script><script type="text/javascript" src='js/jquery.thoughtBubble.js'></script>

<div id='mainContainer' class='container'><img src='ahout.JPG' id="thoughtBubble" alt='whats up?' /></div>

<script type="text/javascript">$(window).ready( function() {$('#thoughtBubble').thoughtBubble({text: 'baby,I love you',font: 'avenir'});});

(function($) {$.fn.thoughtBubble = function( defaults ) {var settings = $.extend({backgroundColor: 'white',fontColor: 'black',width: '330px',height: '210px',fontSize: '15px',bubbleColor: 'white',speed: 125}, defaults ),getBubbleDiv = function( container ) {var offset = container.offset(),modifiedHeight = offset.top - parseInt( settings.height ),style = '"position: absolute; top:' + modifiedHeight + 'px; left:' + offset.left + 'px ; width:' + settings.width + '; height:' + settings.height + ';"',bubbleContainer = "<div class='bubble-holder' style=" + style + ">" + getMainBubble() + getBubbles() + "</div>";return bubbleContainer;},getMainBubble = function() {return '<div class="main-bubble-holder"><div class="bubble main-bubble">' + getText() + '</div></div>';},getText = function() {return '<span style="vertical-align: middle; color: ' + settings.fontColor + ';font-size: ' + settings.fontSize + '; font-family: ' + settings.font + '">' + settings.text + '</span>';},getBubbles = function() {return '<div class="sm-bubble-holder"><div class="bubble bubbleLg"></div><div class="bubble bubbleMd"></div><div class="bubble bubbleSm"></div></div>';},animate = function(){var bubbles = $(document).find('.bubble'),reversed = bubbles.get().reverse(),speed = settings.speed;$(reversed[0]).stop().animate({ opacity: 1}, speed, function() {$(reversed[1]).animate({ opacity: 1}, speed, function() {$(reversed[2]).animate({ opacity: 1}, speed, function() {$(reversed[3]).animate({ opacity: 1},speed);});});});},unanimate = function() {var bubbles = $(document).find('.bubble');bubbles.stop().animate({opacity: 0});},shiftDiv = function( container ) {var bubbleHolder = $(document).find('.bubble-holder'),previousPosition = container.offset().left;bubbleHolder.css('left', previousPosition);};return this.each( function() {var $this = $(this),container = getBubbleDiv( $this );$this.on('mouseenter', animate );$this.on('mouseout', unanimate );$(window).on('resize', shiftDiv.bind(this, $this) );return $this.parent().prepend(container);});};})(jQuery);