Show/Hide rows in matrix dropdown question


                        
        
            Survey.StylesManager.applyTheme("modern");
        

//add barrating type into matrix columns (run-time)
Survey.matrixDropdownColumnTypes.barrating = {
    onCellQuestionUpdate: function(cellQuestion, column, question, data) {
        Survey.matrixDropdownColumnTypes.dropdown.onCellQuestionUpdate(cellQuestion, column, question, data);
    }
};

                
                    var json = {
  "elements": [
    {
      "type": "checkbox",
      "name": "car",
      "title": "What cars have you being drived?",
      "isRequired": true,
      "colCount": 4,
      "choicesOrder": "asc",
      "choices": [
        "Audi",
        "BMW",
        "Citroen",
        "Ford",
        "Mercedes-Benz",
        "Nissan",
        "Peugeot",
        "Tesla",
        "Toyota",
        "Vauxhall",
        "Volkswagen"
      ]
    },
    {
      "type": "matrixdropdown",
      "name": "carrating",
      "isRequired": true,
      "visibleIf": "{car.length} > 0",
      "title": "Please rate these car(s)?",
      "rowsVisibleIf": "{car} contains {item}",
      "cellType": "barrating",
      "choices": [ 1, 2, 3, 4, 5 ],
      "columns": [
        {
          "name": "Style",
          "isRequired": true
        },
        {
          "name": "Performance",
          "isRequired": true
        },
        {
          "name": "Comfort",
          "isRequired": true
        },
        {
          "name": "Quality",
          "isRequired": true
        },
        {
          "name": "Safety",
          "isRequired": true
        },
        {
          "name": "Features",
          "isRequired": true
        }
      ],
      "rows": [
        "Audi",
        "BMW",
        "Citroen",
        "Ford",
        "Mercedes-Benz",
        "Nissan",
        "Peugeot",
        "Tesla",
        "Toyota",
        "Vauxhall",
        "Volkswagen"
      ]
    }
  ]
};
;

                    window.survey = new Survey.Model(json);
                
        
            survey.onComplete.add(function(sender) {
            document.querySelector('#surveyResult').textContent =
            "Result JSON:\n" + JSON.stringify(sender.data, null, 3);
            });
        
        
            $("#surveyElement").Survey({
            model: survey 
            });

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You may use expression properties:

choicesVisibleIf in radio group, checkbox and dropdown questions.
columnsVisibleIf and rowsVisibleIf in matrix question
and rowsVisibleIf in matrix dropdown question

to hide/show choices items, columns and rows in these questions. The expression runs against each choices item. To get the current item value, please use {item} variable in your expression.

The following expression below means: the item is shown if, the same value is checked in the {car} question and it is not selected in the {bestcar} question.

{car} contains {item} and {item}!= {bestcar}

Every ItemValue object has its own visibleIf property. You may override the top level choicesVisibleIf property and define visibleIf expression for an individual choice item.

Third-party libraries: Barrating MIT

Show/Hide rows in matrix dropdown question

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