A major goal of our recruitment survey is to identify users who are between the ages of 14-24 (target population) and those who are not (not eligible for our study). Currently we ask users for their date of birth (MM/DD/YYYY) and would like to use JS to: 1. Calculate age, based on the current date 2. Determine if the age is within our target range (14-24) 3. Provide a validation alert to the users AND/OR categorize users using embedded data in the categories of eligible/ineligible based on age Please take a look at the code I have now for the DOB question: Qualtrics.SurveyEngine.addOnReady(function() { var dob_entry = getTextValue(); var split_dob = dob_entry.split("/"); var month = split_dob[0]; var day = split_dob[1]; var year = split_dob[2]; var dob_asdate = new Date(year, month, day); var today = new Date(); var mili_dif = Math.abs(today.getTime() - dob_asdate.getTime()); var age = (mili_dif / (1000 * 3600 * 24 * 365.25)); within_age_range=(14<age & age<24); alert(age); });

The below code is to calculate the age based on the birth year:Add an embedded data "UserAge" and the below code will assign the age of the user in it. Then in Survey flow, you can add branch logic to categorize user as eligible or ineligible.!

I don't remember seeing this question before @mjs5az resurrected it, but the answers given are doing it the hard way and the accepted answer isn't always accurate. You can do everything @nkumich asked for by using moment.js and adding this script to the DOB question:```Qualtrics.SurveyEngine.addOnPageSubmit(function() { var age = moment().diff(moment(jQuery("#"+this.questionId+" .InputText").val()), 'years');Qualtrics.SurveyEngine.setEmbeddedData('age', age);if(age > 13 && age < 25) Qualtrics.SurveyEngine.setEmbeddedData('eligible', '1');});```Demo survey

Javascript to calculate user's age, based on DOB, check age eligibility, & provide validation alert

Javascript to calculate user's age, based on DOB, check age eligibility, & provide validation alert | XM Community

Sign up

Login to the Community

Scanning file for viruses.

This file cannot be downloaded