Check if a Dynamics 365 Field is Empty using JavaScript

To check if a Dynamics 365 field is empty, you can use:

if(Xrm.Page.getAttribute("fieldname").getValue() == null)

For example, if you wanted to check if the fax number field on the Account record is empty, first open the form and find the field name:

Get the field name:

Now if we add the following script to the loading of the account form:

[sourcecode language=”JavaScript”] function AccountOnLoad() {
if(Xrm.Page.getAttribute("fax").getValue() == null) {
alert("Fax is empty");
}
}
[/sourcecode]

If the fax field is empty, it will display: