Jquery Validation Plugin - Typeerror: $(...).Validate Is Not a Function

Jquery validation plugin - TypeError: $(...).validate is not a function

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:

$(...).validate is not a function with jQuery Validation Plugin

Hello this error may be come because of more than one js load so kindly check , if not more than one js load in the page So it happens because of jquery version 3.X.X(you are using 3.4.1) so please use any other version of jquery , it will resolve your problem thank you

jquery validation error: .validate is not a function

I'm the biggest dummy ever. Nonetheless, perhaps this will help someone else.

The issue was that I was including 2 different versions of jQuery on the same page: both 1.9.0 and 1.10.2

Thanks everyone so much for your help!

Validate is not a function

You should first include the jQuery library

and than your validate plugin

<script src="https://code.jquery.com/jquery-2.1.4.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.15.0/jquery.validate.min.js"></script>
<script src="trunk/dev/validation.js"></script>

P.S: make sure you have only one validate plugin!

Additionally, I'd suggest you to include your <script> tags right before the closing </body> tag.

<form id="register-form">  <input name="email" placeholder="Email Address" type="text">  <input type="submit" value="Sigin up"></form>

<script src="https://code.jquery.com/jquery-3.1.0.js"></script><script src="https://ajax.aspnetcdn.com/ajax/jquery.validate/1.15.0/jquery.validate.min.js"></script><script>  jQuery(function($) {      $("#register-form").validate({      rules: {        email: {          required: true,          email: true        }      }    });      });</script>

TypeError: $(...).validate is not a function

In order to use the validation method of jQuery, you need to import the relative plugin:

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

Also, at start of your JavaScript file insert this:

require('jquery-validation');

For example:

<form>
    <input required>
</form>
<script src="jquery.js"></script>
<script src="jquery.validate.js"></script>
<script>
    $("form").validate();
</script>

See the official documentation for more information.

JQuery validation plugin: $("#").validate() is not a function

You don't quite have it right when you are setting up validate. Try:

    // data validation
$("#createAnimalForm").validate({
    debug: true,
    rules: {
        weight: {
            required: true
        }
    },
    messages: {
            weight: {
              required: "your message here"
            }
    }
});

Then use:

if ($('#createAnimalForm').validate().form()) { ... }

Wherever you want to trigger validation.

Rails 6 and Jquery plugin error: $(...).validate is not a function

I finally figured out what was the problem and it was my environment.js, while I was exposing jquery as resolve(jquery) and as jquery/src/jquery in my ProvidePlugin, it was causing my app to load Jquery twice, thus, preventing jquery-validate to work properly

So I resolved the problem by changing

environment.plugins.prepend('Provide', new webpack.ProvidePlugin({
    $: 'jquery/src/jquery',
    jQuery: 'jquery/src/jquery',
    jquery: 'jquery/src/jquery',
    Popper: ['popper.js', 'default']
}))

to this

environment.plugins.prepend('Provide', new webpack.ProvidePlugin({
    $: 'jquery',
    jQuery: 'jquery',
    jquery: 'jquery',
    Popper: ['popper.js', 'default']
}))

I had tried doing this before, but since I wasn't using expose-loader by then, it wouldn't work.

Another solution that I found online (but not applicable to this problem) is when Yarn loads 2 different dependencies, in that case, yarn-deduplicate on yarn.lock is the way to go

jQuery validate: Uncaught TypeError: $(...)."valid is not a function" with valid references/order

In order to use the jQuery form validation plugin, you need to set it up on your form first. The documentation gives a few examples of this, but basically you need to select the form and run the .validate() function.

var form = $( "#myform" );
form.validate();

Obviously you don't have a form element, so this is something you will need to add.

jQuery Validation Plugin this.optional is not a function

The issue is related to this. When you use arrow functions (you have 2 cases there) the this refers to the upper one's div context, in your case is the this where onRendered has been called. Change arrow function into simple function to get the appropriate this context.

jQuery.validator.addMethod('strongPassword', function (value, element) {
    return this.optional(element)
      || value.length >= 6
      && /\d/.test(value)
      && /[a-z]/i.test(value);
  }, 'Your password must be at least 6 characters long and contain at least one number and one char.');

Jquery Validation Plugin - Typeerror: $(...).Validate Is Not a Function