jquery 文字输入个数限制显示剩余效果代码-html代码-BFW代码库

jquery 文字输入个数限制显示剩余效果代码

代码语言：html

代码描述：jquery 文字输入个数限制显示剩余效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link type="text/css" rel="stylesheet" href="//repo.bfw.wiki/bfwrepo/css/bootstrap.3.3.4.css">
</head>
<body>

    <div class="page-header">
        <h3 class="text-center">textarea 显示限制输入字符</h3>
    </div>

    <form id="testForm" class="form-horizontal">
        <div class="form-group">
            <label class="col-md-3 control-label">反馈</label>
            <div class="col-md-6">
                <textarea class='form-control' name='test' onkeyup='textAreaChange(this)' onkeydown='textAreaChange(this)' rows='5'></textarea>
                <div class='text-right'>
                    <em style='color:red'>10</em>/<span>10</span>
                </div>
            </div>
        </div>
        <div class="form-group">
            <div class="col-md-offset-3 col-md-6">
                <button type="button" class="btn btn-info" id="testConfirm">确认提交</button>
            </div>
        </div>
    </form>

    <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/jquery-3.2.1.min.js"></script>
    <script type="text/javascript">
        //显示限制输入字符method
        function textAreaChange(obj) {
            var $this = $(obj);
            var count_total = $this.next().children('span').text();
            var count_input = $this.next().children('em');
            var area_val = $this.val();
            if (area_val.len() > count_total) {
                area_val = autoAddEllipsis(area_val, count_total); //根据字节截图内容
                $this.val(area_val);
                count_input.text(0); //显示可输入数
            } else {
                count_input.text(count_total - area_val.len()); //显示可输入数
            }
        }
        //得到字符串的字节长度
        String.prototype.len = function() {
            return this.replace(/[^\x00-\xf.........完整代码请登录后点击上方下载按钮下载查看