Qualtrics: Age from Date of Birth. Works with any layout, including Simple. #qualtrics #js #jq #age #birthdate #dob #luxon

ageFromDOB.header.html

<script src="https://cdn.jsdelivr.net/npm/luxon@3.4/build/global/luxon.min.js"></script>

ageFromDOB.header.simple.html

<script src="https://cdn.jsdelivr.net/npm/jquery@3.7.1/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/luxon@3.4/build/global/luxon.min.js"></script>

ageFromDOB.js

Qualtrics.SurveyEngine.addOnPageSubmit(function() {
	var DateTime = luxon.DateTime;
	var birthDate = DateTime.fromFormat(jQuery(this.getQuestionContainer()).find("input[type=text]").val(),"MM/dd/yyyy");
	var age = DateTime.now().diff(birthDate, ['years','months']).toObject();
	Qualtrics.SurveyEngine.setJSEmbeddedData('age',age.years);
});

ageFromDOB.pipe.html

Age in years: ${e://Field/__js_age}