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JQuery - Require a Form Field if Visible

I'm using the Jquery code below for a webform. The code hides the BIL Category drop-down field based on the choice selected in the Type of Funding Request drop-down field. This all works perfectly.

Now I simply want to require the BIL Category field if it is visible. How can I modify the code to achieve this?

 

$(document).ready(function () {
     $("#cr92d_typeoffundingrequest").change(onDisplaySectionChange);
     onDisplaySectionChange();
});

function onDisplaySectionChange() {
    var varFunding = $('#cr92d_typeoffundingrequest').find("option:selected").text();
    if (varFunding === "DWSRF") 
    
    {
    $('#cr92d_bilcategory').parent().parent().hide();
    }
    else{$('#cr92d_bilcategory').parent().parent().show();
}
}
4 REPLIES 4
Fubar
Multi Super User
Multi Super User

Should be able to check visibility using jQuery

 

// for display:[none|block], ignores visibility:[true|false]
.is(":visible");

or

// for hidden
.is(":hidden");

 

Conax
Helper III
Helper III

I'm assuming that you want to make BIL Category a required field if it is shown on the form, and not required if it's hidden.

Here's the link to the documentation of how to add custom validations, which I have used myself: https://learn.microsoft.com/en-us/power-apps/maker/portals/configure/add-custom-javascript

 

In your case, in the newValidator.evaluationfunction, you will have something like:

 

         newValidator.evaluationfunction = function () {
            var varFunding = $('#cr92d_typeoffundingrequest').find("option:selected").text();
            if(varFunding === "DWSRF") return true; // BIL Category will be hidden so validation returns true;

            // only require BIL Category if type of we get to this point
            var varBilCategory = $('#cr92d_bilcategory').find("option:selected").text();
            if (varBilCategory == null || varBilCategory == "") {
            return false;
            } else {
               return true;
            }
         };

 

Thanks @Conax . This is helpful. I got my code working, but not sure where to add additional validation rules as I'm new to JS. I'm also wondering if all of my code is necessary as I'm noticing you simply have one line before introducing your validation rules:

 

newValidator.evaluationfunction = function () {

 

 In contrast, here is my code below that I grabbed from this blog article . You'll notice it has alot more attributes for "newValidotr" which I'm not sure is necessary?

 

Finally, my question now is how would I add more rules to new fields? Would I just copy this exact same block over and over? Or, can I write additional validators as long as its within the  $(document).ready(function () {. I would love to see some complete examples showing multiple validators if anyone could share.

 

// Begin Form validation
if (window.jQuery) {
  (function ($) {
     $(document).ready(function () {
        if (typeof (Page_Validators) == 'undefined') return;
        
        // my custom validator
        var newValidator = document.createElement('span');
        newValidator.style.display = "none";
        newValidator.id = "BILvalidator";
        newValidator.controltovalidate = "cr92d_bilcategory";
        newValidator.errormessage = "<a href='#cr92d_bilcategory'>BIL Category is required.</a>";
        newValidator.validationGroup = ""; // Set this if you have set ValidationGroup on the form
        newValidator.initialvalue = "";
        newValidator.evaluationfunction = function () {
           if ($("#cr92d_bilcategory").is(":visible") && $("#cr92d_bilcategory").val() === "") {
           return false;} // check if BIL is visible and null.
            {
              return true;
           }
        };
        // Add the new validator to the page validators array:
        Page_Validators.push(newValidator);

        // Wire-up the click event handler of the validation summary link
        $("a[href='cr92d_bilcategory']").on("click", function ()   { scrollToAndFocus('cr92d_bilcategory','cr92d_bilcategory'); });
     });
  }(window.jQuery));
}

 

 

Conax
Helper III
Helper III

Hi @Nerd_Gorilla1, yes the code you grabbed from that blog artical is based on the Microsoft documentation I shared with you too. I was only highlighting what you need to put into the newValidator.evaluationfunction, while all the other attributes for newValidator are also required.

 

If you have multiple fields you need to add validation to, I would create a function for it, which should be able to sit outside of $(document).ready(). Also create seperate function for each control you want to validate, something like this...

function validateBIL(){
    if ($("#cr92d_bilcategory").is(":visible") && $("#cr92d_bilcategory").val() === "") {
        return false;
    } // check if BIL is visible and null.
    return true;
}
function validateABC(){
    // validation code for the other control
    // ...
}

function addValidator(validatorId, controlToValidate, errorMessage, validateFunction){
        var newValidator = document.createElement('span');
        newValidator.style.display = "none";
        newValidator.id = validatorId;
        newValidator.controltovalidate = controlToValidate, ;
        newValidator.errormessage = errorMessage;
        newValidator.validationGroup = ""; // Set this if you have set ValidationGroup on the form
        newValidator.initialvalue = "";
        newValidator.evaluationfunction = validateFunction;
        // Add the new validator to the page validators array:
        Page_Validators.push(newValidator);
}

 

Then your code can be changed to

if (window.jQuery) {
  (function ($) {
     $(document).ready(function () {
        if (typeof (Page_Validators) == 'undefined') return;
        
	addValidator("BILvalidator", "cr92d_bilcategory", "<a href='#cr92d_bilcategory'>BIL Category is required.</a>", validateBIL);
        addValidator("ABCvalidator", "cr92d_abc", "Invalid ABC", validateABC);

        // Wire-up the click event handler of the validation summary link
        $("a[href='cr92d_bilcategory']").on("click", function ()   { scrollToAndFocus('cr92d_bilcategory','cr92d_bilcategory'); });
     });
  }(window.jQuery));
}

 

 

 

 

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