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v 1.5.18
v 1.5.18
Overview Examples Docs Source Download

Boolean

Yes/No or True/False question - Boolean question


                        
        
            Survey.StylesManager.applyTheme("modern");
        


            
                var json = { questions: [
  {
    "type": "boolean",
    "name": "bool",
    "title": "Please answer the question",
    "label": "Are you 21 or older?",
    "isRequired": true
  }
]};

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

                    
<!DOCTYPE html>
<html lang="en">
<head>
    <title>Yes/No or True/False question - Boolean question, Knockoutjs Survey Library Example</title>

<meta name="viewport" content="width=device-width" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.0/knockout-min.js"></script>
<script src="https://surveyjs.azureedge.net/1.5.18/survey.ko.js"></script>
<link href="https://surveyjs.azureedge.net/1.5.18/modern.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>
settings

defaultValue: (default is 'indeterminate'). The value showed by default.

var q = survey.getQuestionByName('bool');
survey.clear();
q.defaultValue = yourvalue; 
//restart the survey
survey.render();

var q = survey.getQuestionByName('bool');
q.showTitle = yourvalue; 
survey.render();

valueTrue

var q = survey.getQuestionByName('bool');
q.valueTrue = yourvalue; 
survey.render();

valueFalse

var q = survey.getQuestionByName('bool');
q.valueFalse = yourvalue; 
survey.render();