使用 Qualtrics API 从矩阵表中获取列选择值

Question

I have a matrix with two columns. I want to get the inputs of both columns on page submit. I have been using getChoiceValue , and I have no problem getting the value of the right column. How can I get the value of the left column?

Qualtrics.SurveyEngine.addOnPageSubmit(function()
{
// this does not work
  let left_column_choice = this.getChoiceValue(0);
// this works for sure
  let right_column_choice = this.getChoiceValue(1); 
});

Answer 1

I don't know anything about 'Qualtrics' or any functions it contains, but if you are looking for a plain vanilla JS solution, this might help.

 function getColumnInfo (cols,c) { let arr = [], sel = document.querySelectorAll('.tbl td'); for( const [ndx,val] of sel.entries(sel) ) { if ((ndx % cols) == c) arr.push(val.textContent) }; return arr; } let info = getColumnInfo(4,1); // of 4 column table, get column 1 alert('Column #2 contents:\n'+info);

 <table border='1' class='tbl'> <caption> Table </caption> <tr> <td>Group 1 </td> <td>A </td> <td>a </td> <td>1 </td> </tr> <tr> <td>Group 2 </td> <td>B </td> <td>b </td> <td>2 </td> </tr> <tr> <td>Group 3 </td> <td>C </td> <td>c </td> <td>3 </td> </tr> </table>