vue输入框限制字数，达到100字禁止输入

<!DOCTYPE html><html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1&qu

M_SSY

10653人浏览 · 2018-09-26 11:02:30

M_SSY · 2018-09-26 11:02:30 发布

<!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>

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vue 表单验证

1、6位小写字母和数字必须包含两个字母rules: [{ required: true, message: "XXX不能为空", trigger: "blur" },{ max: 6, message: "最大长度为6位字符", trigger: "blur" },{pattern: /^(?=(?:[^a-z]*[a-z]){2})[a-z0-9]{6,6}$/, //不连续的两位字母// /^