Javascript TypeError: Cannot read properties of null (reading 'getValue')

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Posted on by Gowtham89

Dear All,

I am new to CRM and trying to develop a functionality to show or hide 'MultiSelect choice' field based on the value from other field. Since there is a limitiation to achieve this using CRM business rule, I tried using JS to achieve this functionality. But I am facing below error when trying to do this using JS. I have checked all the word spellings and everything is correct.

TypeError: Cannot read properties of null (reading 'getValue')

Please find my below JS code. Is it possible to advise what needs to be corrected please?

function HideorShowAccessibilityAdjustments(executionContext)

{
var formContext = executionContext.getFormContext();
if (formContext.getAttribute("mntr_areanyreasonableadjustmentsrequired").getValue()!=0) {
formContext.getAttribute("mntr_AccessibilityAdjustments").setVisible(true);
formContext.getAttribute("mntr_NonAccessibilityAdjustments").setVisible(true);
}
else if (formContext.getAttribute("mntr_Areanyreasonableadjustmentsrequired").getValue()!=1) {
formContext.getAttribute("mntr_AccessibilityAdjustments").setVisible(false);
formContext.getAttribute("mntr_NonAccessibilityAdjustments").setVisible(false);
}
}

Thank You,

Gowtham

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Verified answer

Guido Preite 54,086 Moderator on at

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that error happens when the field you are referring to is not added to the form or doesn't exist.

in the code you posted check the field "mntr_areanyreasonableadjustmentsrequired"

pay attention that when you refer to fields inside javascript they are lowercase, so "mntr_AccessibilityAdjustments" should be "mntr_accessibilityadjustments" and "mntr_NonAccessibilityAdjustments" should be "mntr_nonaccessibilityadjustments"

hope it helps

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Gowtham89 on at

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Hi Guido,

Thanks for the response, Yes that did resolve the initial issue. But now I am facing the actual issue described below

TypeError: formContext.getAttribute(...).setVisible is not a function

In the JS code I am trying to show and hide 'Multi-Select' option field in CRM. Do I need to use a different function to make it work.

Thank You,

Gowtham

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Verified answer

Guido Preite 54,086 Moderator on at

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setVisible is a sub method of a getControl, so your code you will need to write

formContext.getControl("mntr_accessibilityadjustments").setVisible(true);

formContext.getControl("mntr_nonaccessibilityadjustments").setVisible(true);

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Gowtham89 on at

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Fantastic..Thanks Guido..You saved my day!!

It works perfectly after I made the suggested changes. Thanks a lot.

Thank You,

Gowtham

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