"Add choice" button for respondents in Qualtrics-CodePudding

in my survey, people are asked to list tools they use and I chose form field as question type. Anyway, I would like my respondents to add as many text entrys as they need, currently the number of text entry is predetermined by me. I think of something like a "add choice" button.

So far, I've found this and it works: https://community.qualtrics.com/XMcommunity/discussion/4150/enable-respondent-to-add-extra-response-fields

var that=this.questionId;
    jQuery("#" this.questionId " tr.ChoiceRow:not(:lt(1))").hide();
    jQuery("<input type='button' id='add' value='Add field' name=' ' />").insertAfter("#" this.questionId " tr.ChoiceRow:last");
    jQuery("#add").on('click',function(){
        var c= jQuery("tr.ChoiceRow:visible").length;
        jQuery("#" that " tr.ChoiceRow:eq(" c ")").show(); 
    });

but you have to change the question type "to matrix table", which I would like to avoid. I don't know what and how to adjust the code in order to make it work for form field type of question.

Thanks!

CodePudding user response：

That code actually adds the button in the wrong place and it could be streamlined.

This will work for a form:

Qualtrics.SurveyEngine.addOnload(function() {
    var cs = jQuery("#" this.questionId " .ChoiceStructure");
    cs.find("tr:not(:lt(1))").hide();
    cs.append("<input type='button' id='add' value='Add field' name=' ' />");
    jQuery("#add").on('click',function(){
        var c = cs.find("tr:visible").length;
        cs.find("tr:eq(" c ")").show(); 
    });
});