TypeError: $(…).modal is not a function

The error "The $(…).modal is not a function" commonly arises due to incorrect script loading order, where scripts are not arranged in a sequential order that matches their dependencies. Browsers execute scripts in the order they encounter them, and accessing elements in a script before they are available can result in errors. To mitigate this issue, it is crucial to ensure that scripts are arranged in the correct order, with dependent scripts placed below those they rely on, thus preventing such errors from occurring.

TypeError: $(…).modal is not a function with bootstrap Modal

Bootstrap : TypeError

For example, bootstrap depends on jQuery , so jQuery must be referenced first. So, you must called the jquery.min.js and then bootstrap.min.js like the following:

<script src="/jquery-3.3.1.min.js"></script> <script src="/bootstrap.min.js"></script>


Bootstrap modal does not work well with jQuery UI dialog

The Bootstrap Modal error occurs when Bootstrap's JavaScript library is not included before attempting to use the modal function. It's essential to understand that the modal functionality is defined within Bootstrap.js and relies on jQuery. Therefore, you must include jQuery before Bootstrap's JavaScript to ensure the proper functioning of modal components. To prevent this error, follow the correct order of inclusion: first jQuery, followed by Bootstrap's JavaScript, before invoking the modal function.

Plugin dependencies

Many plugins and CSS components have dependencies on other plugins or libraries. It's crucial to consult the documentation for each plugin to identify any such dependencies. Additionally, please bear in mind that all plugins rely on jQuery, so it's essential to include jQuery in your project before including the plugin files. Ensuring the correct order of inclusion and addressing any dependencies is essential for the proper functioning of these components within your web application.

Multiple jQuery instances

javascript TypeError: $(...).modal is not a function with bootstrap Modal

This warning can also appear if jQuery is declared multiple times in your code. When there are multiple jQuery declarations, it can disrupt the functioning of bootstrap.js and other scripts. It's important to ensure that you have only one instance of jQuery in your code to avoid conflicts and ensure proper functionality. If you're working with multiple files and scripts, make sure to consolidate jQuery into a single instance to resolve this issue.


The "TypeError: $(…).modal is not a function" error typically occurs when Bootstrap's modal functionality is accessed before including Bootstrap's JavaScript library. It's crucial to include jQuery before Bootstrap's JavaScript and to check for proper script order to resolve this error.