Issue with JavaScript Not Functioning Properly in Qualtrics Survey Preview

Question

I wrote a JavaScript to randomly draw 2 numbers in a question with some constraints. The script works when I select the question box and click “Preview Question”, as shown belowbut it does not function properly when I click preview for the survey, as shown below Here is the code I wrote. Could anyone tell me why this issue occurs and provide some guidance? I would really appreciate your help! Thanks a lot in advance!!!

Chee Heng_SZ · Accepted Answer

Hi ​@w29913,I am not very knowledgeable on JavaScript. Iusedthe piped text of the form field question instead.Then, i realised that they are concatenating when I tried to add them.Hence, I changed thedata type of value1 and random1, which are likely string type, to numbers before adding them.Qualtrics.SurveyEngine.addOnload(function(){/*Place your JavaScript here to run when the page loads*/const random1options=[0,2,4,6];const random2options=[0,20,30,40];let random1=random1options[Math.floor(Math.random() * random1options.length)];let random2=random2options[Math.floor(Math.random() * random2options.length)];while (random1 === 0 && random2 ===0) {random1=random1options[Math.floor(Math.random() * random1options.length)];random2=random2options[Math.floor(Math.random() * random2options.length)];}    /*For checking data in console. To delete if you do not require this line.*/console.log("Random1: " +random1);     /*Getting the 2nd input of the form field question. Do remember to change the QID to suit your case*/let value1= "${q://QID20/ChoiceTextEntryValue/2}";    /*Changing the format of the value1 and random1 from string to number.*/let sum= Number(value1)+ Number(random1);    /*For checking data in console. To delete if you do not require these two lines.*/console.log("value1: " +value1);console.log("sum: " +sum);this.getQuestionTextContainer().innerHTML="xx increase by " + sum +" and xx increase by "+random2 +"%, which of the following you will choose?";});

Chee Heng_SZ · Answer

Try changing the portion from ` to “” instead?this.getQuestionTextContainer().innerHTML="xx increase by " + random1 +" and xx increase by "+random2 +" %, which of the following you will choose?";

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