vue监听对input输入的字体字数限制 

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<title>Examples</title>
<meta name="description" content="">
<meta name="keywords" content="">
<link href="" rel="stylesheet">
<script src="https://cdn.bootcss.com/vue/2.4.2/vue.min.js"></script>
</head>
<body>
    <div id="app">
        <input type="text" v-model="items.text" ref="count"/>
        <div  v-html="number"></div>
    </div>
    <script>
        new Vue({
            el: '#app',
            data: {
                number: '100',
                items: {
                    text:'',
                },
            },
            watch:{   //watch()监听某个值（双向绑定）的变化，从而达到change事件监听的效果
                items:{
                    handler:function(){
                        var _this = this;
                        var _sum = 100; //字体限制为100个
                        _this.$refs.count.setAttribute("maxlength",_sum);
                        _this.number= _sum- _this.$refs.count.value.length;
                    },
                    deep:true
                }
            }
        })
    </script>
</body>
</html>

原文出处链接地址：http://www.cnblogs.com/xueweijie/p/6859965.html

posted @ 2017-09-01 13:13  捞档哥  阅读(13861)  评论(0)  编辑  收藏  举报