You're not loading the validation plugin. You need:

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.min.js"></script>

Put this before the line that loads the additional methods.

Also, you should get the additional methods from the CDN as well, rather than jquery.bassistance.de.

Other errors:

[4.20]

should be

[4,20]

and

rangelenght:

should be:

rangelength:
Answer from Barmar on Stack Overflow
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Jquery
forum.jquery.com › portal › en › community › topic › validate-is-not-a-function
validate is not a function
Ask questions here if you're new to jQuery or JavaScript and need help making sense of it all · Ask questions and report issues related to using jQuery. Discuss anything related to jQuery itself. For issues with plugins, ask in the jQuery Plugins forum · Want to discuss the forum itself?
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"validate is not a function" after npm install, npm start
I've tried two times, I have the files cloned from this repository. Here's the debug log `0 info it worked if it ends with ok 1 verbose cli [ '/usr/local/bin/node', '/usr/local/... More on github.com
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3
July 26, 2016
$("#signupForm").validate is not a function.
Subject of the issue I get a browser error: $("#signupForm").validate is not a function. (In '$("#signupForm").validate', '$("#signupForm").validate' i... More on github.com
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13
March 28, 2017
magento2 - Magento 2: Form Validator is not a function - Magento Stack Exchange
I am trying to use the new Magento 2 version and I have discovered that the form validator doesn't work as well. When I try to add a product in the amdinistration panel I get this error: Uncaught More on magento.stackexchange.com
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Uncaught TypeError: $(...).valid is not a function
I am getting error on below line $(“#btnSave”).click(function () { if (!$(“#formRoom”).valid()) { return; } SaveRoomData(); }); }); More on forum.freecodecamp.org
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0
0
October 11, 2022
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Edureka Community
edureka.co › home › community › categories › web development › jquery › jquery validation plugin - typeerror ...
Jquery validation plugin - TypeError validate is not a function | Edureka Community
June 7, 2022 - My script throw errors: TypeError: jQuery.validator is undefined additional-methods.js:20 TypeError: $(...) ... pole jest wymagane!" } } })
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Syncfusion
support.syncfusion.com › kb › article › 9004 › how-to-resolve-the-typeerror-in-javascript-spreadsheet
How to resolve the TypeError n(…).valid is not a function in Spreadsheet?
“TypeError: n(…).valid is not a function” script error is raised, if the jQuery validation script is not referred in your application.
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Drupal
drupal.org › project › clientside_validation › issues › 3217889
Uncaught TypeError: $(...).validate is not a function [#3217889] | Drupal.org
June 6, 2023 - When using clientside_valiadtion with webforms a JS error occurs. Steps to reproduce: - Create a new webform - Go to the ‘settings’ tab and select the ‘emails/handlers’ submenu - Click on the ‘add handler’ button - An error appears in the Console as follows: Uncaught TypeError: $(...).validate is not a function
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ASPSnippets
aspsnippets.com › questions › 544269 › Solved-Error-Uncaught-TypeError-valid-is-not-a-function
Solved Error Uncaught TypeError valid is not a function
October 11, 2022 - $("#btnSave").click(function () ... validate is not a function error occurs when the jQuery validation plugin is not loaded or the jQuery and related scripts are loaded in an incorrect order....
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GitHub
github.com › jquery-validation › jquery-validation › issues › 1983
$("#signupForm").validate is not a function. · Issue #1983 · jquery-validation/jquery-validation
March 28, 2017 - (In '$("#signupForm").validate', '$("#signupForm").validate' is undefined) ... `<script type="text/javascript" src="/user/js/lib/jquery.js"></script> <script type="text/javascript" src="/user/js/dist/jquery.validate.min.js"></script> <script type="text/javascript"> /* $.validator.setDefaults( { submitHandler: function () { alert( "submitted!"
Author   wimdemo
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freeCodeCamp
forum.freecodecamp.org › javascript
Uncaught TypeError: $(...).valid is not a function
October 11, 2022 - I am getting error on below line $(“#btnSave”).click(function () { if (!$(“#formRoom”).valid()) { return; } SaveRoomData(); }); });
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Qiita
qiita.com › javascript
TypeError: $(…).validate is not a functionではまった件 - Qiita
June 9, 2019 - "TypeError: $(…).validate is not a function"のエラーで関数が実行できない。 · validate()関数は、ライブラリ内で定義されている。 · ライブラリ(jQuery.validate.jsファイル)自体は読み込まれている。 · なぜ、、、? ·
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Jqueryvalidation
jqueryvalidation.org › documentation
Documentation | jQuery Validation Plugin
Not all of them are documented here: accept – Makes a file upload accept only specified mime-types. creditcard – Makes the element require a credit card number. extension – Makes the element require a certain file extension. ... You can find the source code for all additional methods in the GitHub repository. It is possible to re-define the implementation of the built-in rules using the $.validator.methods property
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Jquery
forum.jquery.com › portal › en › community › topic › simple-form-validation-error-returns-error-valid-is-not-a-function
Returns error . $(...).valid is not a function
Ask questions here if you're new to jQuery or JavaScript and need help making sense of it all · Ask questions and report issues related to using jQuery. Discuss anything related to jQuery itself. For issues with plugins, ask in the jQuery Plugins forum · Want to discuss the forum itself?
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Kinsta®
kinsta.com › home › resource center › blog › javascript errors › how to fix the “uncaught typeerror: $ is not a function” error
How To Fix the “Uncaught TypeError: $ Is Not a Function” ...
October 1, 2025 - ... The jQuery library is not properly loaded. If the jQuery library isn’t properly loaded or enqueued, the ‘$’ symbol won’t be recognized as a valid function and it will throw an error.
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Jqueryvalidation
jqueryvalidation.org › validate
.validate() | jQuery Validation Plugin
May 23, 2013 - A boolean true is not a valid value. Example: Disables onkeyup validation. ... The element currently being validated, as a DOMElement. ... The event object for this keyup event. ... Validate checkboxes, radio buttons, and select elements on click. Set to false to disable. Set to a Function to decide for yourself when to run validation.
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YouTube
youtube.com › mama airaa
Uncaught TypeError: $(...).validate is not a function - YouTube
Uncaught TypeError: $(...).validate is not a function:Root cause and solution.
Published   May 19, 2021
Views   353
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Django Documentation
docs.djangoproject.com › en › 5.2 › ref › forms › validation
Form and field validation | Django documentation | Django
The validate() method on a Field handles field-specific validation that is not suitable for a validator. It takes a value that has been coerced to a correct datatype and raises ValidationError on any error.
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Bootstrap
getbootstrap.com › docs › 5.0 › forms › validation
Validation · Bootstrap v5.0
We recommend using client-side validation, but in case you require server-side validation, you can indicate invalid and valid form fields with .is-invalid and .is-valid. Note that .invalid-feedback is also supported with these classes.