jQuery Validate verification, a specific example of verification rules written in the control

Write the verification rules into the control

<script src="../js/jquery.js" type="text/javascript"></script>
<script src="../js/jquery.validate.js" type="text/javascript"></script>
<script src="./js/jquery.metadata.js" type="text/javascript"></script>
$().ready(function() {
 $("#signupForm").validate();
});
<form id="signupForm" method="get" action="">
    <p>
        <label for="firstname">Firstname</label>
        <input id="firstname" name="firstname" class="required" />
    </p>
 <p>
  <label for="email">E-Mail</label>
  <input id="email" name="email" class="required email" />
 </p>
 <p>
  <label for="password">Password</label>
  <input id="password" name="password" type="password" class="{required:true,minlength:5}" />
 </p>
 <p>
  <label for="confirm_password">确认密码</label>
  <input id="confirm_password" name="confirm_password" type="password" class="{required:true,minlength:5,equalTo:&#39;#password&#39;}" />
 </p>
    <p>
        <input class="submit" type="submit" value="Submit"/>
    </p>
</form>

Tips:
When using class="{}", the package must be introduced: jquery.metadata.js

You can use the following method to modify the prompt content:
class="{required:true,minlength:5,messages:{required:'Please enter the content'}}"

When using the equalTo keyword, the following content must be enclosed in quotation marks, as shown in the following code:
class="{required:true,minlength:5,equalTo:'#password'}"

More jQuery Validate verification, specific examples of verification rules written in controls, please pay attention to the PHP Chinese website for related articles!