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General Form Validation - entityFormClientValidate Function

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Posted on by Nerd_Gorilla1

All,

I'm using Microsoft's documentation located here to write some form validation rules in my portal. Here is the sample code that Microsoft offers. Notice where they have comments to insert you custom validation.

if (window.jQuery) {
 (function ($) {
 if (typeof (entityFormClientValidate) != 'undefined') {
 var originalValidationFunction = entityFormClientValidate;
 if (originalValidationFunction && typeof (originalValidationFunction) == "function") {
 entityFormClientValidate = function() {
 originalValidationFunction.apply(this, arguments);
 // do your custom validation here
 // return false; // to prevent the form submit you need to return false
 // end custom validation.
 return true;
 };
 }
 }
 }(window.jQuery));
}

Now, below is my code with custom validation rules applied. After saving these in Form Steps >Form Options, it still doesn't seem to work. I'm able to still advance to the next screen/form step when the field "BIL Category" is set to one of the values. Any ideas?

if (window.jQuery) {
 (function ($) {
 if (typeof (entityFormClientValidate) != 'undefined') {
 var originalValidationFunction = entityFormClientValidate;
 if (originalValidationFunction && typeof (originalValidationFunction) == "function") {
 entityFormClientValidate = function() {
 originalValidationFunction.apply(this, arguments);
 // Begin custom validation.
 var categoryValue = $('#cr92d_bilcategory').find("option:selected").text();
 if (categoryValue !== 'Emerging Contaminants ' && categoryValue !== 'Lead Service Line ' && categoryValue !== 'Supplemental') {
 return false;}
 // End custom validation.
 return true;
 };
 }
 }
 }(window.jQuery));
}

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Customize & extend

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Fubar 8,338 Super User 2025 Season 2 on at

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General, debugging
if all you do is return False does it stop? (i.e. don't validate anything - just use the MST provided code and return false)
If Yes, then issue is in your custom validation
If No, then check if the "entityFormClientValidate" object exists

(just a side note: as a general rule, always try and use internal identifiers rather than Text label values for comparisons - otherwise when someone later on decides to rename a label your code breaks)

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Nerd_Gorilla1 31 on at

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Ok I was able to get it working using Microsoft's Additional client-side field validation code snippet instead of the General validation snippet. As someone who is new to JS and form validation, can someone explain when I would use the General validation code snippet instead? What is the difference between the two?

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Fubar 8,338 Super User 2025 Season 2 on at

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In the old days you would use the "Page_Validators" for Entity/Basic Forms, and the "entityFormClientValidate" for Web/Advanced/Multi-Step Forms (has had various names over the years). The "Page_Validators" approach allows you to format the error messages as thought they are out of the box errors.

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