jQuery1.4 中逐个修改一句话中各个字的字体大小

jquery字体animatecallback

解决方案 »

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<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.11.0-rc1.js"></script>
<script type="text/javascript">
var i = 0;
var st;
$(document).ready(function(){
  $("input").click(function(){
    st = setInterval(sleep,2000);

  })

});
function sleep(numberMillis) {
    var span = $("span");
    var len = $("span").length;    for(;i<len;){
      $(span[i]).animate({fontSize:"50px"},1000,function(){
    $(this).animate({fontSize:"20px"},10000);
    });
      i++
      break;
    }
    if(i == len){
      clearInterval(st);
    }
}
</script>
</head>
<body>
<input type="button" value="Start"><br/>
<span>H</span> <span>e</span> <span>l</span> <span>l</span> <span>o</span> <span>,</span> <span>W</span> <span>o</span> <span>r</span> <span>l</span> <span>d</span> <span>!</span>
</body></html>
可以实现你要的功能但是效果不是很好自己在优化下
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.11.0-rc1.js"></script>
<style>
div{line-height:60px;text-align:center}
</style>
<script type="text/javascript">
$(document).ready(function(){
var span=$("span"),arr=[60, 55, 50, 45, 40, 35, 30, 25, 20, 15, 10, 5,5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 55, 50, 45, 40, 35, 30, 25, 20, 15, 10, 5,5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60],l=0,k;
  $("input").click(function(){
    setInterval(function(){
$.each(span,function(i,item){
$(item).css("font-size",arr[l+i]+"px");
});
l=l>22?0:l+1;
},100);
})
});
</script>
</head>
<body>
<input type="button" value="Start">
<div>
<span>H</span> <span>e</span> <span>l</span> <span>l</span> <span>o</span> <span>,</span> <span>W</span> <span>o</span> <span>r</span> <span>l</span> <span>d</span> <span>!</span>
</div>
</body></html>