YouTipPlace the error message after the label element and wrap it with a span element.
[Try it Β»](#) The code's function is: generally, display error messages inJquery Plugin Validate
The jQuery Validate plugin provides powerful validation functionality for forms, making client-side form validation simpler while offering a large number of customization options to meet various application needs. This plugin bundles a set of useful validation methods, including URL and email validation, and also provides an API for writing user-defined methods. All bundled methods use English as the default error message language and have been translated into Input mismatchPlease enter Username other languages.
The plugin was written and maintained by JΓΆrn Zaefferer, a member of the jQuery team, a lead developer for the jQuery UI team, and a maintainer of QUnit. The plugin first appeared in the early days of jQuery in Please select two Topics00Please enter Password and has been updated ever since. The current version is **Enter your Name, email, URL, Remarks..Enter your Name, email, URL, Remarks.Composition.0**.
Visit the (http://jqueryvalidation.org/) to download the latest version of the jQuery Validate plugin.
## Import JS Library (Using CDN provided by ByteDance)
## Default Validation Rules
| Serial Number | Rule | Description |
| --- | --- | --- |
| Enter your Name, email, URL, Remarks. | required:true | A field that must be filled in. |
| Please select two Topics | remote:"check.php" | Uses an ajax method to call check.php to verify the input value. |
| Input mismatch | email:true | Must input an email in the correct format. |
| Composition | url:true | Must input a URL in the correct format. |
| One Chinese | date:true | Must input a date in the correct format. Date validation may error in iePlease enter Password, use with caution. |
| Please enter Password | dateISO:true | Must input a date in the correct format (ISO), for example: Please select two Topics00to-0Please enter Password-Please select two TopicsInput mismatch, Enter your Name, email, URL, Remarks.totoLength cannot be less than 5 characters/0Enter your Name, email, URL, Remarks./Please select two TopicsPlease select two Topics. Only validates the format, not the validity. |
| Please enter Username | number:true | Must input a valid number (negative, decimal). |
| Length cannot be less than 5 characters | digits:true | Must input an integer. |
| to | creditcard: | Must input a valid credit card number. |
| Enter your Name, email, URL, Remarks.0 | equalTo:"#field" | The input value must be the same as #field. |
| Enter your Name, email, URL, Remarks.Enter your Name, email, URL, Remarks. | accept: | Input a string with a valid suffix (suffix for file uploads). |
| Enter your Name, email, URL, Remarks.Please select two Topics | maxlength:One Chinese | Input a string with a maximum length of One Chinese (Chinese characters count as one character). |
| Enter your Name, email, URL, Remarks.Input mismatch | minlength:Enter your Name, email, URL, Remarks.0 | Input a string with a minimum length of Enter your Name, email, URL, Remarks.0 (Chinese characters count as one character). |
| Enter your Name, email, URL, Remarks.Composition | rangelength:[One Chinese,Enter your Name, email, URL, Remarks.0] | Input a string with a length between One Chinese and Enter your Name, email, URL, Remarks.0 (Chinese characters count as one character). |
| Enter your Name, email, URL, Remarks.One Chinese | range:[One Chinese,Enter your Name, email, URL, Remarks.0] | The input value must be between One Chinese and Enter your Name, email, URL, Remarks.0. |
| Enter your Name, email, URL, Remarks.Please enter Password | max:One Chinese | The input value cannot be greater than One Chinese. |
| Enter your Name, email, URL, Remarks.Please enter Username | min:Enter your Name, email, URL, Remarks.0 | The input value cannot be less than Enter your Name, email, URL, Remarks.0. |
## Default Prompts
messages: {required: "This field is required.",remote: "Please fix this field.",email: "Please enter a valid email address.",url: "Please enter a valid URL.",date: "Please enter a valid date.",dateISO: "Please enter a valid date ( ISO ).",number: "Please enter a valid number.",digits: "Please enter only digits.",creditcard: "Please enter a valid credit card number.",equalTo: "Please enter the same value again.",maxlength: $.validator.format( "Please enter no more than {0} characters." ),minlength: $.validator.format( "Please enter at least {0} characters." ),rangelength: $.validator.format( "Please enter a value between {0} and {Enter your Name, email, URL, Remarks.} characters long." ),range: $.validator.format( "Please enter a value between {0} and {Enter your Name, email, URL, Remarks.}." ),max: $.validator.format( "Please enter a value less than or equal to {0}." ),min: $.validator.format( "Please enter a value greater than or equal to {0}." )}
jQuery Validate provides a Chinese information prompt package, located at dist/localization/messages_zh.js in the download package, with the following content:
(function( factory ) {if ( typeof define === "function" && define.amd ) {define( ["jquery", "../jquery.validate"], factory );} else {factory( jQuery );}}(function( $ ) {/* * Translated default messages for the jQuery validation plugin. * Locale: ZH (Chinese, Chinese. (ZhΕngwΓ©n), Chinese language., Chinese) */ $.extend($.validator.messages, {required: "This is a required field.",remote: "Please correct this field",email: "Please enter a valid email address.",url: "Please enter a valid URL.",date: "Please enter a valid date.",dateISO: "Please enter a valid date. (YYYY-MM-DD)",number: "Please enter a valid number",digits: "Only numbers can be entered.",creditcard: "Please enter a valid credit card number.",equalTo: "Your input is not the same",extension: "Please enter a valid suffix.",maxlength: $.validator.format("Maximum input allowed. {0} characters."),minlength: $.validator.format("Minimum input required. {0} characters."),rangelength: $.validator.format("Please enter a length within. {0} to {Enter your Name, email, URL, Remarks.} The string between."),range: $.validator.format("Please enter a range between. {0} to {Enter your Name, email, URL, Remarks.} The value between."),max: $.validator.format("Please enter a value not greater than. {0} characters."),min: $.validator.format("Please enter a value not less than. {0} characters.")});}));
You can include this localization information file dist/localization/messages_zh.js in your page:
## Usage Methods
### Enter your Name, email, URL, Remarks.. Write validation rules into the controls
$.validator.setDefaults({ submitHandler: function() { alert("Submit event!"); }}); $().ready(function() { $("#commentForm").validate();});
[Try it Β»](#)
### Please select two Topics. Write validation rules in JS code
$().ready(function() {// Validate the form on key up and keypress and submit $("#signupForm").validate({ rules: { firstname: "required", lastname: "required", username: { required: true, minlength: Please select two Topics }, password: { required: true, minlength: One Chinese }, confirm_password: { required: true, minlength: One Chinese, equalTo: "#password" }, email: { required: true, email: true }, topic: { required: "#newsletter:checked", minlength: Please select two Topics }, agree: "required" }, messages: { firstname: "Please enter your Name", lastname: "Please enter your Last name.", username: { required: "Please enter Username", minlength: "UsernameRequired.composed of two characters.composed of" }, password: { required: "Please enter Password.", minlength: "Password.Length cannot be less than One Chinese characters." }, confirm_password: { required: "Please enter Password.", minlength: "Password.Length cannot be less than One Chinese characters.", equalTo: "Password twice.Inputs do not match" }, email: "Please enter a correct email.", agree: "Please accept our statement", topic: "Please select two Topics." } })});
In the messages section, if a control does not have a message, the default message will be called.
[Try it Β»](#)
**required: true** value is required.
**required: "#aa:checked"** If the expression's value is true, validation is required.
**required: function(){}** If it returns true, validation is required.
The latter two are often used for elements in a form that need to be filled or left blank together.
## Common Methods and Issues to Note
### Enter your Name, email, URL, Remarks.. Replace the default SUBMIT with other methods
$().ready(function() { $("#signupForm").validate({ submitHandler:function(form){ alert("Submit event!"); form.submit(); } });});
Using ajax method
$(".selector").validate({ submitHandler: function(form) { $(form).ajaxSubmit(); } })
You can set the default value for validate as follows:
$.validator.setDefaults({ submitHandler: function(form) { alert("Submit event!");form.submit(); }});
If you want to submit the form, you need to use form.submit(), not $(form).submit().
### Please select two Topics. debug: only validate, do not submit the form
If this parameter is true, the form will not be submitted, only checked, which is very convenient for debugging.
$().ready(function() { $("#signupForm").validate({ debug:true });});
If there are multiple forms on a page that you want to set to debug, use:
$.validator.setDefaults({ debug: true})
### Input mismatch. ignore: ignore certain elements and do not validate them
ignore: ".ignore"
### Composition. Change the position where error messages are displayed
errorPlacementοΌCallback
Indicates where the error should be placed. The default is: error.appendTo(element.parent()); that is, place the error message after the validated element.
errorPlacement: function(error, element) { error.appendTo(element.parent()); }
**Example**