这篇文章主要讲解了“怎么用vue代码实现表单数据验证”,文中的讲解内容简单清晰,易于学习与理解,下面请大家跟着小编的思路慢慢深入,一起来研究和学习“怎么用vue代码实现表单数据验证”吧!
为el-form表单添加:rules
在data中定义规则
将定义的规则绑定在el-form-item
代码如下:
<!--登录表单区域--> <el-form :model="loginform" label-width="0px" class="login_form" :rules="loginformrules"> <!--用户名--> <el-form-item prop="username"> <el-input v-model="loginform.username" prefix-icon="el-icon-user"></el-input> </el-form-item> <!--密码--> <el-form-item prop="password"> <el-input v-model="loginform.password" prefix-icon="el-icon-lock" type="password"></el-input> </el-form-item> <!--按钮区域--> <el-form-item class="btns"> <el-button type="primary">登录</el-button> <el-button type="info">重置</el-button> </el-form-item> </el-form> <script> export default{ data(){ return { //登录表单数据绑定对象 loginform:{ username:'', password:'' }, //表单验证规则 loginformrules:{ //验证用户名是否合法 username:[ { required: true, message: '请输入用户名', trigger: 'blur' }, { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' } ], //验证密码是否合法 password:[ { required: true, message: '请输入密码', trigger: 'blur' }, { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' } ] } } } } </script>
ps:下面看下vue 自定义指令input表单的数据验证的代码
<template> <div class="check" > <h3>{{msg}}</h3> <div class="input"> <input type="text" v-input v-focus><span>{{msg1}}</span> </div> <div class="input"> <input type="text" v-input v-required><span>{{msg2}}</span> </div> <div class="input"> <!-- required:true/false 表示这个是必填项 --> <input type="text" v-input v-checked="{required:true,}"><span>{{msg3}}</span> </div> <div class="input"> <!-- <input type="text" v-input v-validate="'required|email|phone|min(5)|max(15)|minlength(6)|maxlength(12)|regex(/^[0-9]*$/)'"> required 验证是否是必填项 email 验证是否是邮箱 phone 验证是否是电话号码 min(5) 验证最小值 max(3) 验证最大值 minlength(6) 验证最小长度 maxlength(12) 验证最大长度 regex(/^[0-9]*$/) 进行正则验证 --> <input type="text" v-input v-validate="'required|min(5)|max(15)|minlength(6)|maxlength(12)|regex(/^[0-9]*$/)'" placeholder="多选验证"> </div> <div class="input"> <!-- 验证必须是数字:/^[0-9]*$/ 验证由26个英文字母组成的字符串:/^[a-za-z]+$/ 验证手机号: /^[1][3,4,5,7,8][0-9]{9}$/; 验证邮箱:/^(w-*.*)+@(w-?)+(.w{2,})+$/; --> <input type="text" v-input v-validate="'required|phone'" placeholder="验证手机号码"> </div> <div class="input"> <input type="text" v-input v-validate="'required|email'" placeholder="验证邮箱"> </div> </div> </template> <script> export default { name: 'check', data() { return { msg: '指令', tipsbordercolor: 'red', msg1: '最简单的指令', msg2: '验证不能为空的指令', msg3: '进行正则验证', tipsmsg: '', } }, directives: { // 修饰input框的指令 input: { // 当被绑定的元素插入到dom上的时候 inserted: function (el) { el.style.width = "300px"; el.style.height = "35px"; el.style.lineheight = "35px"; el.style.background = "#ddd"; el.style.fontsize = "16px"; el.style.border = "1px solid #eee"; el.style.textindent = "5px"; el.style.textindent = "8px"; el.style.borderradius = "5px"; } }, // input框默认选中的指令 focus: { inserted: function (el) { el.focus(); } }, // 不能为空的指令 required: { inserted: function (el) { el.addeventlistener('blur', function () { if (el.value == '' || el.value == null) { el.style.border = "1px solid red"; console.log('我不能为空'); } }) } }, // 验证指令 checked: { inserted: function (el) { return el } }, // 验证 validate: { inserted: function (el, validatestr) { // 将验证规则拆分为验证数组 let validaterulearr = validatestr.value.split("|"); // 监听失去焦点的时候 el.addeventlistener('blur', function () { //失去焦点进行验证 checkedfun(); }); // 循环进行验证 function checkedfun() { for (var i = 0; i < validaterulearr.length; ++i) { let requiredregex = /^required$/; // 判断设置了required let emailregex = /^email$/; // 判断设置了email let phoneregex = /^phone$/; // 判断设置了 phone let minregex = /min(/; //判断设置了min 最小值 let maxregex = /max(/; //判断设置了max 最大值 let minlengthregex = /minlength(/; //判断设置了 minlength 最大长度 let maxlengthregex = /maxlength(/; //判断设置了 maxlength 最大长度 let regexregex = /regex(/; // 判断设置了required if (requiredregex.test(validaterulearr[i])) { if (!required()) { break; } else { removetips(); } } // 判断设置了email if (emailregex.test(validaterulearr[i])) { if (!email()) { break; } else { removetips(); } } // 判断设置了 phone if (phoneregex.test(validaterulearr[i])) { if (!phone()) { break; } else { removetips(); } } // 判断是否设置了最小值 if (minregex.test(validaterulearr[i])) { if (!eval(validaterulearr[i])) { break; } else { removetips(); } } // 判断是否设置了最大值 if (maxregex.test(validaterulearr[i])) { if (!eval(validaterulearr[i])) { break; } else { removetips(); } } // 判断设置了最小长度 if (minlengthregex.test(validaterulearr[i])) { if (!eval(validaterulearr[i])) { break; } else { removetips(); } } // 判断设置了最大长度 if (maxlengthregex.test(validaterulearr[i])) { if (!eval(validaterulearr[i])) { break; } else { removetips(); } } // 判断测试正则表达式 if (regexregex.test(validaterulearr[i])) { if (!eval(validaterulearr[i])) { break; } else { removetips(); } } } } // 验证是否是必填项 function required() { if (el.value == '' || el.value == null) { // console.log("不能为空"); tipmsg("不能为空"); return false; } return true; } // 验证是否是邮箱 function email() { let emailrule = /^(w-*.*)+@(w-?)+(.w{2,})+$/; if (!emailrule.test(el.value)) { tipmsg("请输入正确的邮箱地址"); return false; } return true; } // 验证是否是手机号码 function phone() { let phonerule = /^[1][3,4,5,7,8][0-9]{9}$/; if (!phonerule.test(el.value)) { tipmsg("请输入正确的手机号码"); return false; } return true; } // 最小值验证 function min(num) { if (el.value < num) { tipmsg("最小值不能小于" + num); //console.log('最小值不能小于'+num); return false; } return true; } // 最大值验证 function max(num) { if (el.value > num) { tipmsg("最大值不能大于" + num); //console.log('最大值不能大于'+num); return false; } return true; } // 最小长度验证 function minlength(length) { if (el.value.length < length) { //console.log('最小长度不能小于'+length); tipmsg("最小长度不能小于" + length); return false; } return true; } // 最大长度进行验证 function maxlength(length) { if (el.value.length > length) { //console.log('最大长度不能大于'+length); tipmsg("最大长度不能大于" + length); return false; } return true; } // 进行正则表达式的验证 function regex(rules) { if (!rules.test(el.value)) { tipmsg("请输入正确的格式"); return false; } return true; } // 添加提示信息 function tipmsg(msg) { removetips(); let tipsdiv = document.createelement('div'); let curdate = date.parse(new date()); tipsdiv.innertext = msg; tipsdiv.classname = "tipsdiv"; tipsdiv.id = curdate; tipsdiv.style.position = "absolute"; tipsdiv.style.top = el.offsettop + 45 + 'px'; tipsdiv.style.left = el.offsetleft + 'px'; document.body.appendchild(tipsdiv); //settimeout(function(){ // document.getelementbyid(curdate).remove(); //},2000); } // 移除提示信息 function removetips() { if (document.getelementsbyclassname('tipsdiv')[0]) { document.getelementsbyclassname('tipsdiv')[0].remove(); } } }, } } } </script> <style> .input { padding-bottom: 20px; float: left; clear: both; margin-left: 500px; display: block; } .check input { width: 300px; height: 35px; outline: none; background: #ddd; } .check span { padding-left: 20px; } .tipsdiv { height: 27px; line-height: 25px; border: 1px solid #333; background: #333; padding: 0px 5px; border-radius: 4px; color: #fff; font-size: 16px; } .tipsdiv:before { content: ''; display: block; border-width: 0 5px 8px; border-style: solid; border-color: transparent transparent #000; position: absolute; top: -9px; left: 6px; } </style>