TypeError: $(...).bootstrapValidator is not a function , it does load the ContactUs.js file, but it's not able to find the function

Question

TypeError: $(...).bootstrapValidator is not a function , it does load the ContactUs.js file, but it's not able to find the function

24.3k Views Asked by Shahzeb At 24 April 2025 at 13:58

As the Code is given and it is not able to find the function. I have tried several changes but still get the Error the sequence is also correct. The head part is at the top script and the other environment development is at the bottom of the code between the <body> section.

<head>       
        <meta charset="utf-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>About Us-Azure Solutionz</title>

        <environment names="Development">
            <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.css" />
            <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/jquery.bootstrapvalidator/0.5.3/css/boots‌trapValidator.css"/>

            <link rel="stylesheet" href="css/ContactUs.css" />
            <link rel="stylesheet" href="~/css/site.css" />
             <link rel="stylesheet" href="css/NavbarButton.css"/>
            <link rel="stylesheet"  href="css/AboutUs.css"/>

              <link rel="stylesheet" href="css/Footer.css"/>
        </environment>
        <environment names="Staging,Production">
            <link rel="stylesheet" href="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.5/css/bootstrap.min.css"
                  asp-fallback-href="~/lib/bootstrap/dist/css/bootstrap.min.css"
                  asp-fallback-test-class="sr-only" asp-fallback-test-property="position" asp-fallback-test-value="absolute" />
            <link rel="stylesheet" href="~/css/site.min.css" asp-append-version="true"/>
        </environment>

    </head>
<environment names="Development">
            <script src="~/lib/jquery/dist/jquery.js"></script>
            <script src="~/lib/bootstrap/dist/js/bootstrap.js"></script>
            <script src="~/js/site.js" asp-append-version="true"></script>
        </environment>
        <environment names="Staging,Production">
            <script src="https://ajax.aspnetcdn.com/ajax/jquery/jquery-2.1.4.min.js"
                    asp-fallback-src="~/lib/jquery/dist/jquery.min.js"
                    asp-fallback-test="window.jQuery">
            </script>
            <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.0/jquery.js"></script>
            <script src="https://ajax.aspnetcdn.com/ajax/bootstrap/3.3.5/bootstrap.min.js"
                    asp-fallback-src="~/lib/bootstrap/dist/js/bootstrap.min.js"
                    asp-fallback-test="window.jQuery && window.jQuery.fn && window.jQuery.fn.modal">
            </script>
            <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jquery.bootstrapvalidator/0.5.3/js/bootstr‌apValidator.js"></script>
            <script src="js/ContactUs.js" type="text/javascript"></script>
            <script src="~/js/site.min.js" asp-append-version="true"></script>
        </environment>

Original Q&A

There are 3 best solutions below

shareef On 12 October 2016 at 11:44

From here thanks shehary

TypeError: $(…).... is not a function

is a common error where

jQuery library not included at all in the document
Specific JS library (in this case bootstrapvalidator.js) placed above jQuery library or not included at all in the document.
When following the most common practice to put all JS libraries in footer and then place custom scripts somewhere inside the page above all JS libraries and those custom script(s) not $(document).ready(function(){ });

Best and most common practice using JS libraries is in following order

JQuery lib (Always comes first)
Framework lib (e.g bootstrap, foundation etc)
Any other additional JS libraries

Custom script lib (Put all custom scripts here and make sure they are DOM ready and this file always placed as last file)

Try to place the CSS and JS in following order in section

<head>
    <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.css"/>
    <link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/jquery.bootstrapvalidator/0.5.3/css/bootstrapValidator.css"/>
    <!---- AnyOther custom stylesheets ---->
    <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.0/jquery.js"></script>
    <script type="text/javascript" src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.js"></script>
    <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/jquery.bootstrapvalidator/0.5.3/js/bootstrapValidator.js"></script>
    <!---- Any

Ionut On 13 December 2016 at 13:48

Add this:

    <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery.bootstrapvalidator/0.5.3/js/bootstrapValidator.min.js"> </script>

after your jquery library and framework librery (bootstrap, etc)

so you will have something like this:

 <script src="Scripts/jquery-1.9.1.js"></script>
    <script src="Scripts/jquery-1.9.1.min.js"></script>
    <script src="Scripts/bootstrap.min.js"></script>
    <script src="Scripts/bootstrap.js"></script>
<%-- here you may add another scripts you have...  --%>
    <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/jquery.bootstrapvalidator/0.5.3/js/bootstrapValidator.min.js"> </script>

**Pawan B** · Accepted Answer

Pawan B On 27 February 2016 at 06:21 BEST ANSWER

your url results in 404 error :

https://cdnjs.cloudflare.com/ajax/libs/jquery.bootstrapvalidator/0.5.3/js/bootstr‌apValidator.js

try this link :

https://cdnjs.cloudflare.com/ajax/libs/bootstrap-validator/0.5.3/js/bootstrapValidator.js

TypeError: $(...).bootstrapValidator is not a function , it does load the ContactUs.js file, but it's not able to find the function

There are 3 best solutions below

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