Survey.StylesManager.applyTheme("default");
var json = { showQuestionNumbers: "off",
questions: [
{
type: "matrix",
name: "matrix",
title: "Please select the question you wish to answer",
columns: [
{
value: 'yes',
text: "Yes, I do"
},
{
value: 'no',
text: "Please do not ask this question"
}
],
rows: [
{
value: "name",
text: "Could you answer what is your name?"
},
{
value: "city",
text: "Could you tell us the city you have born?"
}
]
},
{
type: "text",
name: "name",
title: "What is your name?",
visibleIf: "{matrix.name} = 'yes'"
},
{
type: "text",
name: "city",
title: "What is the city you have born?",
visibleIf: "{matrix.city} = 'yes'"
}
]
};
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");
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<head>
<title>Example of using complex questions values in an expression, Knockoutjs Survey Library Example</title>
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<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-knockout/survey.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 the typical question value, for example "text", in an expression as:
visibileIf: "{textQuestion} = 'Yes'"For questions like Multiple Text, Matrix, Matrix Dropdown, Matrix Dynamic and Panel Dynamic you can't use the same approach.
"name": { "firstName": "John", "lastName": "Snow"}As result you may use it in expression as:
visibleIf: "{name.firstName} = 'John' and {name.lastName = 'Snow'}"
"rateTeaches": { "math": { "knowSubject": 5, "explainsClearly": 4}, "literature": { "knowSubject": 4, "explainsClearly": 4} }You may use it in expression as:
visibleIf: "{rateTeaches.math.explainsClearly} > 3}"
"rateTeaches": [{"subject": "math", "knowSubject": 5, "explainsClearly": 4}, {"subject": "literature", "knowSubject": 4, "explainsClearly": 4} ]The expression can be as:
visibleIf: "{rateTeaches[0].explainsClearly} > 3}"