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v 1.9.6
v 1.9.6
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Show/Hide choices in radiogroup/checkbox/dropdown

Use choicesVisibleIf property to show/hide choices items in radio group, checkbox and dropdown questions


                        
        
            Survey.StylesManager.applyTheme("modern");
        


            
                var json = {
  "elements": [
    {
      "type": "checkbox",
      "name": "car",
      "title": "What cars have you being drived?",
      "isRequired": true,
      "colCount": 4,
      "choicesOrder": "asc",
      "choices": [ "Ford", "Vauxhall", "Volkswagen", "Nissan", "Audi", "Mercedes-Benz", "BMW", "Peugeot", "Toyota", "Citroen", "Tesla" ]
    },
    {
      "type": "radiogroup",
      "name": "bestcar",
      "isRequired": true,
      "choicesOrder": "asc",
      "title": "What car did you enjoy the most?",
      "hideIfEmptyChoices": true,
      "choicesVisibleIf": "{car} contains {item}",
      "choices": [ "Ford", "Vauxhall", "Volkswagen", "Nissan", "Audi", "Mercedes-Benz", "BMW", "Peugeot", "Toyota", "Citroen", "Tesla" ]
    },
    {
      "type": "radiogroup",
      "name": "secondcar",
      "isRequired": true,
      "choicesOrder": "asc",
      "visibleIf": "{car.length} > 1",
      "title": "What car is your second choice?",
      "choicesVisibleIf": "{car} contains {item} and {item}!={bestcar}",
      "choices": [ "Ford", "Vauxhall", "Volkswagen", "Nissan", "Audi", "Mercedes-Benz", "BMW", "Peugeot", "Toyota", "Citroen", "Tesla" ]
    }
  ]
};

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

                    
<!DOCTYPE html>
<html lang="en">
<head>
    <title>Use choicesVisibleIf property to show/hide choices items in radio group, checkbox and dropdown questions, Knockoutjs Survey Library Example</title>

<meta name="viewport" content="width=device-width" />
    <script src="https://unpkg.com/knockout@3.5.1/build/output/knockout-latest.js"></script>
    <script src="/DevBuilds/survey-knockout/survey.ko.min.js"></script>
    <link href="/DevBuilds/survey-core/modern.min.css" type="text/css" rel="stylesheet" />
    <link rel="stylesheet" href="./index.css">

</head>
<body>
    
            <div id="surveyElement" style="display:inline-block;width:100%;">
            </div>
    <div id="surveyResult"></div>

<script type="text/javascript" src="./index.js"></script>

</body>
</html>

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.