https://www.thehewittfertilitycentre.org.uk/App_Plugins/UmbracoForms/Assets/umbracoforms-dependencies.js

1/*
2    Umbraco Forms - Dependencies Checker
3*/
4
5function performDependencyChecks(formId){
6
7    //Only perform check if the global 'Umbraco.Sys' is null/undefined
8    //If present means we are in backoffice & that this is being rendered as a macro preview
9    //We do not need to perform this check here
10    if (typeof Umbraco !== 'undefined' && typeof Umbraco.Sys !== 'undefined'){
11        return;
12    } 
13    else {
14        //Check that a Form ID is passed into the function 
15        if(formId){
16            
17            //Select the wrapping div around the form 
18            //umbraco_form_GUID
19            var umbracoForm = document.getElementById('contour_form_' + formId);
20            
21            var errorElement = document.createElement('div');
22            errorElement.className='umbraco-forms missing-library';
23            errorElement.style.color = '#fff';
24            errorElement.style.backgroundColor = '#9d261d';
25            errorElement.style.padding = '15px';
26            errorElement.style.margin = '10px 0';
27            var errorMessage = "";
28            
29            //Ensure umbracoForm is not null
30            if(umbracoForm) {
31                
32                //Check for jQuery
33                if (typeof jQuery == 'undefined') {
34                    errorMessage = errorMessage + 'jQuery has not been loaded & is required for Umbraco Forms.';
35                } else {
36                    //These only work if jQuery is present, so it's in the else block
37                    
38                    //Check for jQuery Validation
39                    if(!$.validator) {
40                        errorMessage = errorMessage + '<br />jQuery Validate has not been loaded & is required for Umbraco Forms.'
41                    }
42                    
43                    //Check for jQuery Validation Unobtrusive
44                    //Only works if jQuery validator has been loaded
45                    if($.validator && !$.validator.unobtrusive) {
46                        errorMessage = errorMessage + '<br />jQuery Validate Unobtrusive has not been loaded & is required for Umbraco Forms.';
47                    }
48                }
49                if(errorMessage !== "") {
50                    errorElement.innerHTML = errorMessage + '<br/> <a href="https://our.umbraco.org/documentation/products/umbracoforms/developer/Prepping-Frontend/" target="_blank" style="text-decoration:underline; color:#fff;">See Umbraco Forms Documentation</a>';
51                    umbracoForm.insertBefore(errorElement, umbracoForm.childNodes[0]);
52                }
53            }
54        }
55    }
56}
57