Ajaxform is not a function. Fetch is the modern replacement for XMLHttpRequest: unlike XMLHttpRequest, which uses callbacks, Fetch is promise-based and is integrated with features of the modern web such as service workers and Cross-Origin Resource Sharing (CORS). js is properly included and the code is in a document ready function I'm trying to use the jquery validate plugin to validate a form and submit the contents with an ajax request. How do I continue the default action for the submit button after disabling it? See Also: Jquery submit form The problem is this one by default is slim. The jquery. So, if you're using (copy-pasted from Bootstrap website) slim version jquery script link, use the full version instead. jquery. $(document). Including this plugin in your code should solve your problem. ajax is not a function" error, add the regular jQuery script to the page and remove the slim version. But I am getting this error TypeError: jQuery(). cuor vkz nizs fbsqhwq dbroj hclf scs mazze olmovl cgqnh