代码改变世界

48.判断文本中回车的数量

2017-06-30 15:29  笨笨03  阅读(204)  评论(0)  编辑  收藏  举报 






 1 <!DOCTYPE html>
 2 <html>
 3 <head lang="en">
 4     <meta charset="UTF-8">
 5     <title>判断文本中回车的数量</title>
 6 </head>
 7 <body>
 8 <textarea id="t" cols="30" rows="10">
 9 </textarea>
10 <button id="btn" onclick="tom()">获取</button>
11 <script>
12 
13     var tom = function () {
14         c = document.getElementById('t').value;
15         var counts = c.split('\n').length - 1;
16         alert('总共有' + counts + "个回车");
17     }
18 </script>
19 
20 </body>
21 </html>



View Code




<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>判断文本中回车的数量</title>
</head>
<body>
<textarea id="t" cols="30" rows="10">
</textarea>
<button id="btn" onclick="tom()">获取</button>
<script>

    var tom = function () {
        c = document.getElementById('t').value;
        var counts = c.split('\n').length - 1;
        alert('总共有' + counts + "个回车");
    }
</script>

</body>
</html>