What is the best way to limit time frame when use anonymous survey link?

You need to create 2 embedded variable.

Enrolment date: “EnrollmentDate”

Text set variable: “surveyAccessible” Answer codes “true” and “false”

Paste this in first question. It can be a text info question.

Qualtrics.SurveyEngine.addOnload(function() {

  /* Place your JavaScript here to run when the page loads */

  var enrollmentDate = "${e://Field/EnrollmentDate}"; // Replace with the actual embedded data for enrollment date
  var currentDate = new Date();

  var enrollmentDateObj = new Date(enrollmentDate);

  // Calculate the start and end dates of the survey window period based on enrollment date
  var surveyStartDate = new Date(enrollmentDateObj);
  surveyStartDate.setMonth(surveyStartDate.getMonth() + 2); // Start survey window 2 months after enrollment
  surveyStartDate.setDate(1); // Set the start date to the 1st day of the month

  var surveyEndDate = new Date(surveyStartDate);
  surveyEndDate.setMonth(surveyEndDate.getMonth() + 1); // End survey window 1 month after the start date
  surveyEndDate.setDate(0); // Set the end date to the last day of the month

  // Check if the current date falls within the survey window period
  if (currentDate >= surveyStartDate && currentDate <= surveyEndDate) {
    Qualtrics.SurveyEngine.setEmbeddedData("surveyAccessible", "true");
  } else {
    Qualtrics.SurveyEngine.setEmbeddedData("surveyAccessible", "false");
  }
});

Now you can screen out condition based on the variable “surveyAccessible”

@praveengeorgeix 

@praveengeorgeix Thank you! 

One last question, what would be the JavaScript code that would determine survey accessible for let’s say 6 months after the enrollment date? 

For example, if the current date is in between 3 months period, then surveyAccessible will equal 3 (instead of false in this case). If the current date is in between 6 months period, then surveyAccessible will equal 6. And so on. 

I am just trying to see if I can modify your code to further assess the other time period when the survey should become available. Or if you have other suggestions, I am all ears! 

Thank you again!