JavaScript | 基础表单验证（纯Js）

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基础表单验证（纯js）

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验证思路

监听每个input控件的焦点离开（onblue），当焦点离开时调用验证函数，验证后修改第三栏文字，显示符合/不符合并返回true/false

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实现代码：

index.html

 <!DOCTYPE html>

 <html>

 <head>

     <title></title>

     <link rel="stylesheet" href="css.css">

 </head>

 <body>

     <form id="form" action="" method="post" onsubmit="return vilidate()">

         <table class="table">

             <tr>

                 <td>雇员编号</td>

                 <td>

                     <input type="text" id="empnb" name="empnb" onblur="validateEmpnb()">

                 </td>

                 <td>

                     <span id="empnbMsg"></span>

                 </td>

             </tr>

             <tr>

                 <td>雇员姓名</td>

                 <td>

                     <input type="text" id="ename" name="ename" onblur="validateEname()">

                 </td>

                 <td>

                     <span id="enameMsg"></span>

                 </td>

             </tr>

             <tr>

                 <td>雇员职位</td>

                 <td>

                     <input type="text" name="epost" id="epost" onblur="validateEpost()">

                 </td>

                 <td>

                     <span id="epostMsg"></span>

                 </td>

             </tr>

             <tr>

                 <td>雇员日期</td>

                 <td>

                     <input type="text" name="" id="edate" name="edate" onblur="validateEdate()">

                 </td>

                 <td>

                     <span id="edateMsg"></span>

                 </td>

             </tr>

             <tr>

                 <td>基本工资</td>

                 <td>

                     <input type="text" name="esalary" id="esalary" onblur="validateEsalary()">

                 </td>

                 <td>

                     <span id="esalaryMsg"></span>

                 </td>

             </tr>

             <tr>

                 <td>佣金</td>

                 <td>

                     <input type="text" name="ebrok" id="ebrok" onblur="validateEbrok()">

                 </td>

                 <td>

                     <span id="ebrokMsg"></span>

                 </td>

             </tr>

             <tr>

                 <td colspan="3">

                     <input type="submit" autofocus="autofocus">

                     <input type="reset">

                 </td>

             </tr>

         </table>

     </form>

 </body>

 <script type="text/javascript" src="./FormValidation.js"></script>

 </html>

FormValidation.js

 // 日期选择

 function layDate() {

 }

 // 验证雇员编号,4位纯数字编号

 function validateEmpnb() {

     return validateRegexp("empnb", /^\d{4}$/);

 }

 // 验证雇员姓名,不为空

 function validateEname() {

     return validateNull("ename");

 }

 // 验证雇员职位,不为空

 function validateEpost() {

     return validateNull("epost");

 }

 // 验证雇员日期

 function validateEdate() {

     return validateRegexp("edate", /^\d{4}-\d{2}-\d{2}$/)

 }

 // 验证基本工资

 function validateEsalary() {

     return validateRegexp("esalary", /^\d+(\.\d{1,2})?$/)

 }

 // 验证佣金

 function validateEbrok() {

     return validateRegexp("ebrok", /^\d+(\.\d{1,2})?$/)

 }

 // 提交时全部重新验证

 function validate() {

     return validateEmpnb() && validateEname() && validateEpost() && validateEdate() && validateEsalary() && validateEbrok();

 }

 // 正则表达式验证

 function validateRegexp(elemName, regexp) {

     var elem = document.getElementById(elemName);

     var msg = document.getElementById(elemName + 'Msg')

     console.log(regexp);

     console.log(elem.value);

     if (regexp.test(elem.value)) {

         msg.innerHTML = 'ok';

         msg.style.color = 'green';

         return true;

     } else {

         msg.innerHTML = '您的输入不符合规则';

         msg.style.color = 'red';

         return false;

     }

 }

 // 不为空验证

 function validateNull(elemName) {

     var elem = document.getElementById(elemName);

     var msg = document.getElementById(elemName + 'Msg');

     console.log(elem.value);

     console.log(msg);

     if (elem.value == '' || elem.value == ' ') {

         msg.innerHTML = '您的输入不能为空';

         msg.style.color = 'red';

         return false;

     } else {

         msg.innerHTML = 'ok';

         msg.style.color = 'green';

         return true;

     }

 }

css.css

 html {

     font-size: 14px;

 }

 .table {

     border: 1px grey solid;

 }

 .table tr {

     height: 2rem;

 }

 .table td {

     width: 15rem;

 }

巴特西

JavaScript | 基础表单验证（纯Js）

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