Is it possible to dynamically change the Question Text based on an embedded field value?

Question

Instead of duplicating a question and adding display logic to display either one depending on whether or not an embedded data field is empty, I'd like to just have javascript dynamically change the question text depending on whether or not the embedded field is empty. I've already proven I can do this by duplicating the question and adding display logic to display either one based on whether or not a person's last name is empty (after setting the embedded data after my authentication piece). I would just rather have a single question in my response output.
So far I have:
Qualtrics.SurveyEngine.addOnload(function()
{
   /*Place your JavaScript here to run when the page loads*/
   var text = jQuery("#"+this.questionId+" .QuestionText")
   var lastname = "${e://Field/LAST_NAME}";
   if(!!lastname)
      text.html("We DONT HAVE your last name")
   Else
      text.html("We have your last name")
});
I've also tried variations on the logic to check for the null value (e.g. lastname === "", lastname is null, etc.), but I can't seem to make it work.

Best answer by ahmedA

Qualtrics.SurveyEngine.addOnReady(function () {
qc = this.getQuestionContainer().querySelector(".QuestionText");
lastname = "${e://Field/LAST_NAME}";
if (lastname == "") {
qc.innerText = "We DONT HAVE your last name";
} else {
qc.innerText = "We have your last name";
}
});

ahmedA · Accepted Answer

Qualtrics.SurveyEngine.addOnReady(function () {
qc = this.getQuestionContainer().querySelector(".QuestionText");
lastname = "${e://Field/LAST_NAME}";
if (lastname == "") {
qc.innerText = "We DONT HAVE your last name";
} else {
qc.innerText = "We have your last name";
}
});

lizb311 · Answer

Here's one workaround without using javascript - just more embedded data, and branches in your survey flow.
Say

lastname

is the field with embedded data for your respondent's last name. We can create another embedded data field with the text that you want to appear in your question... we'll call it

lastname_qtext

here.
Add the embedded data for

lastname

in your survey flow. Beneath that, create a branch in your survey flow that respondents will go through with the condition that

lastname

is empty. Within that branch, create a new embedded data field called

lastname_qtext

, and set it to be whatever text you want displayed in the question for respondents missing last names. So it could be something like "DON'T" in this case.
If you want, you can create another branch for the condition that

lastname

is NOT empty.
When writing your question, use piped text for the new embedded data field

lastname_qtext

to create a question that will dynamically change based on the value of

lastname_qtext

(which was determined by the value of

lastname

). You'd just have to make sure that the question comes AFTER the branch in your survey flow where you define

lastname_qtext

.
Here's a screenshot of what your survey flow and question text could look like.

Here's what the question text could look like, with the piped text.

Here's what the question would look like when the last name is missing:

And here's what the question text would look like when the last name is present:

Hope that works for you!

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