jQuery文本框输入文字放大预览代码

<title>jQuery文本框输入文字放大预览代码</title>

<script src="js/jquery.min.js"></script>

<style type="text/css">
.fill_ipt{
position: relative;
margin: 200px 0 0 500px;
}
.showbig{
display: block;
width: 400px;
height: 40px;
border: 1px solid #404040;
}
input{
display: block;
width: 100%;
height: 100%;
outline: none;
border: none;
text-indent: 20px;
}
.bigtx{
height: 30px;
min-width:10px;
line-height: 30px;
padding: 0px 8px;
border: 1px solid #C9CFDA;
background: #f5f7fc;
box-shadow: 0 0 10px rgba(120,144,156,0.2);
position: absolute;
left: 0;
top: -0px;
font-size: 24px;
color: #1c2b36;
line-height: normal;
/*display: none;*/
opacity: 0;
transition: all 0.2s;
}
.bigtx span{
font-size: 24px;
color: #1c2b36;
}
</style>

jQuery文本框输入文字放大预览代码是一款键盘输入文字到输入框的时候文字在上部放大显示效果。