JQuery表单验证插件EasyValidator用法分析

简介

JQuery表单验证插件EasyValidator是一款简单易用的表单验证工具，它使用简单，功能强大，可自定义规则，支持异步验证，支持表单序列化，支持多语言等特性。本篇攻略将详细介绍EasyValidator的使用方法和示例。

使用步骤

1. 引入EasyValidator插件的js和css文件

<link rel="stylesheet" href="path/to/easyvalidator.css">
<script src="path/to/jquery.min.js"></script>
<script src="path/to/easyvalidator.js"></script>

1. 编写HTML表单代码

<form id="myForm">
  <input type="text" name="username" placeholder="用户名">
  <input type="password" name="password" placeholder="密码">
  <button type="submit">提交</button>
</form>

1. 初始化EasyValidator插件

$("#myForm").easyValidator({
  rules: {
    username: {
      required: true,
      minlength: 4
    },
    password: {
      required: true,
      minlength: 6
    }
  },
  messages: {
    username: {
      required: "请输入您的用户名",
      minlength: "用户名长度不能小于4"
    },
    password: {
      required: "请输入您的密码",
      minlength: "密码长度不能小于6"
    }
  },
  submitHandler: function(form) {
    alert("表单提交成功！");
    form.submit();
  }
});

示例说明

1. 邮箱格式校验

<form id="emailForm">
  <input type="email" name="email" placeholder="请输入邮箱">
  <button type="submit">提交</button>
</form>

$("#emailForm").easyValidator({
  rules: {
    email: {
      required: true,
      email: true
    }
  },
  messages: {
    email: {
      required: "请输入您的邮箱地址",
      email: "请输入正确的邮箱地址"
    }
  },
  submitHandler: function(form) {
    alert("表单提交成功！");
    form.submit();
  }
});

1. 异步校验

<form id="asyncForm">
  <input type="text" name="username" placeholder="请输入用户名">
  <input type="password" name="password" placeholder="请输入密码">
  <button type="submit">提交</button>
</form>

$("#asyncForm").easyValidator({
  rules: {
    username: {
      required: true,
      minlength: 4
    },
    password: {
      required: true,
      minlength: 6
    },
    remote: {
      url: "path/to/check_username_available.php",
      type: "post",
      dataType: "json",
      data: {
        username: function() {
          return $("input[name='username']").val();
        }
      }
    }
  },
  messages: {
    username: {
      required: "请输入您的用户名",
      minlength: "用户名长度不能小于4",
      remote: "用户名已存在"
    },
    password: {
      required: "请输入您的密码",
      minlength: "密码长度不能小于6"
    }
  },
  submitHandler: function(form) {
    alert("表单提交成功！");
    form.submit();
  }
});

结束语

EasyValidator是一个非常实用的表单验证工具，可以帮助我们快速地实现前端表单的校验和交互，极大地提高了工作效率。希望这篇攻略能对您有所帮助。