Demo 在线地址:
https://sx00xs.github.io/test/24/index.html
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ide: vscode
文件格式:.vue
解析:(待补)
<template> <div id="app"> <input type="text" class="f-text" v-model="num" @keyup="handleNum"> <input type="button" value="是否为两位数" @click="handleClick"> </div> </template> <script> export default { data:function(){ return{ num:'' } }, methods:{ handleClick(){ (this.num=='') ? alert('请输入数字!') : alert(/^d{2}$/.test(parseInt(this.num)) ? '√ 是两位数' : "这是 "+this.num.length + ' 位数'); }, handleNum(){ this.num=this.num.replace(/[^d]/,'') } } } </script>