i can’t use display Logic because this question is conditioned by the answer of the previous question and both are in the same view. I tried to include the display logic but the option was not available.

https://www.qualtrics.com/community/discussion/comment/23503#Comment_23503Hello Tom,
Can this code be adapted to hide an option of the question, but using the naming of the option instead of the id?
For example: if the multiple choice question has several names, is it possible to write a code that hides the option "John"?
Best regards,
Francisco.

https://www.qualtrics.com/community/discussion/comment/33199#Comment_33199Yes, it is possible to write code to do that.

https://www.qualtrics.com/community/discussion/comment/33200#Comment_33200Thank you for your answer, I was trying to do it through:
jQuery("#"+this.questionId+" input[Choice_____=${e://Field/Name}]").closest("li").hide()
but I just don't know how to find what I should write instead of "ChoiceID", in order to get the question to be hidden based on the name...
I also tried to find the choiceID of the name, and then apply the code you wrote above, but I can't get it to work...
var a = getChoicesFromVariableName("${e://Field/Name}");
var id=a[0];
jQuery("#"+this.questionId+" input[choiceid=" + id + "]").closest("li").hide();
Do you have any suggestions you're willing to share, please?

https://www.qualtrics.com/community/discussion/comment/33202#Comment_33202You can't do it directly with a selector. You'll need to loop through the choices and examine the label text.

https://www.qualtrics.com/community/discussion/comment/33204#Comment_33204I understand, so basically I would need to do something like:
var qid = this.questionId;
var choice_contents = Qualtrics.SurveyEngine.QuestionInfo[qid].Choices;
var i;
for (i = 0; i < choice_contents.length; i++) {
if (choice_contents[i] == "${e://Field/Name}"){
var a = i+1;
 jQuery("#"+this.questionId+" inputtchoiceid=" + a + "]").closest("li").hide();
}
}
I tried this without success... unfortunately i'm completely unfamiliar with javascript syntax, could you give me any feedback please?

In your code I think choice_contents[i] is an object, not a text field. Also, there is no guarantee that the choiceid is the same as the loop number + 1.
I would take a different approach (assumes single answer, vertical MC - not tested):
jQuery("#"+this.questionId+" label.SingleAnswer").each(function() {
var label = jQuery(this);
if(label.text() == "${e://Field/Name}") label.closest("li").hide();
});

https://www.qualtrics.com/community/discussion/comment/33209#Comment_33209Hello Tom,
I just tried it and it worked perfectly! Thank you very much for your help and patience!
Best regards,
Francisco Leandro.

Hello Tom,
I was wondering if you could help me. I am getting an error when I try to use the code - it is an unexpected end of input error. I am pasting the code below. I have a multiple choice drop down list where I would like to hide one of the choices that was already selected in a previous question. I don't want the user to select the same choice in both questions. I am not familiar at all with JavaScript, so I am hoping you could help me.

Qualtrics.SurveyEngine.addOnReady(function()
{
               /*Place your JavaScript here to run when the page is fully displayed*/
jQuery("#"+this.questionId+" label.SingleAnswer").each(function() {
   var label = jQuery(this);
   if(label.text() == "${q://QID9/ChoiceGroup/SelectedChoices}") label.closest("li").hide();
             
});      

I think it is just a syntax error. Try:
Qualtrics.SurveyEngine.addOnReady(function() {
jQuery("#"+this.questionId+" label.SingleAnswer").each(function() {
    var label = jQuery(this);
    if(label.text() == "${q://QID9/ChoiceGroup/SelectedChoices}") label.closest("li").hide();
});             
});    

That cleared the error. However, it is not doing what I expected. What I am trying to do is hide from the dropdown the value selected in question 9. Both questions are country lists and I would like to ensure that the user does not select the same country twice. I thought that the easiest way would be to hide the choice already selected. Do you have any suggestions how I could do this.
Thank you for the help.

https://www.qualtrics.com/community/discussion/comment/35950#Comment_35950As I said above, the code is for a single answer, vertical MC question. A select (dropdown) is completely different. Also, you can't hide select options in all browsers; the best you can do is disable them.

https://community.qualtrics.com/XMcommunity/discussion/comment/33209#Comment_33209@TomG How would this be different if we assumed a dropdown list (single answer)?

https://community.qualtrics.com/XMcommunity/discussion/comment/48493#Comment_48493The equivalent for a drop down would be something like (untested):
jQuery("#"+this.questionId+" select option").each(function() {
var option = jQuery(this);
if(option.text() == "${e://Field/Name}") option.prop("disabled",true).hide();
});

https://community.qualtrics.com/XMcommunity/discussion/comment/48502#Comment_48502TomG Hmm, I tried this and it is disabling each option but not hiding them for some reason. Very weird. Do you know why this would be?

Yes, as I mentioned somewhere up above, not all browsers support hiding select options. Your browser must not.