<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>ECharts</title>
</head>
<style>
body {
height: 100%;
margin: 0px;
}
html {
height: 100%;
}
</style>
<body>
<div class="customer-message">
<textarea id="ss"></textarea>
</div>
</body>
<script src="js/jquery-1.8.2.js"></script>
<script>
window.onload = function () {
//获取文本内容和长度函数
function txtCount(el) {
var val = el.value;
var eLen = val.length;
return eLen;
}
var el=$("#ss");
el.bind("propertychange input",function(){
var len = txtCount(this); // 调用函数
alert(len)
})
}
</script>
</html>