Hi @Kenny, Shane (DEW),
In classic page, you could use following code to create a cascading drop-down
<script language="javascript" type="text/javascript" src="https://crescent.sharepoint.com/sites/marketing/2018/SiteAssets/jquery-3.4.1.min.js"></script>
<script language="javascript" type="text/javascript" src="https://crescent.sharepoint.com/sites/marketing/2018/SiteAssets/jquery.SPServices.min.js"></script>
<script language="javascript" type="text/javascript">
$(document).ready(function() {
$().SPServices.SPCascadeDropdowns({
relationshipList: "Country",
relationshipListParentColumn: "Region",
relationshipListChildColumn: "Title",
parentColumn: "Region",
childColumn: "Country",
debug: true
});
});
</script>
For more details you could refer to following article
https://www.sharepointdiary.com/2019/01/sharepoint-online-cascading-drop-down-list-using-jquery.html
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