I have a JavaScript in my survey to calculate the difference between the date entered and the current date. It is working perfectly on a web browser, but not working on mobile devices. 

The current code is as follows:

Qualtrics.SurveyEngine.addOnPageSubmit(function()
{
	const currentDate = Qualtrics.SurveyEngine.getEmbeddedData("currentDate");
	const currentQuestionValue = this.getChoiceAnswerValue();

	const dateDifference2 = new Date(currentQuestionValue).getTime() - new Date(currentDate).getTime() ;
    Qualtrics.SurveyEngine.setEmbeddedData("dateDifference2", dateDifference2); 

	console.log("Current Date: " + currentDate)
	console.log("Current Question Value: " + currentQuestionValue)
	console.log("Date Difference2 : " + dateDifference2)
});

Anyone know how to adjust the code to make it compatible with phones?