Survey.StylesManager.applyTheme("bootstrap");
Survey.defaultBootstrapCss.navigationButton = "btn btn-green";
function MyTextValidator(params) {
var value = params[0];
return value.indexOf("survey");
}
// Register the function for use in SurveyJS expressions
Survey.FunctionFactory.Instance.register("MyTextValidator", MyTextValidator);
var json = {
"elements": [
{
"type": "comment",
"name": "memo",
"isRequired": true,
"title": "Type here text to pass the validation ",
"validators": [
{
"type": "expression",
"text": "Your text should contains 'survey' word.",
"expression": "MyTextValidator({memo}) >= 0"
}
]
}
]
};
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>Custom Validators, 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-core/survey.core.min.js"></script>
<script src="/DevBuilds/survey-core/survey.i18n.min.js"></script>
<script src="/DevBuilds/survey-knockout-ui/survey-knockout-ui.min.js"></script>
<link rel="stylesheet" href="https://unpkg.com/bootstrap@3.3.7/dist/css/bootstrap.min.css">
<link rel="stylesheet" href="./index.css">
</head>
<body style="margin: 0">
<div id="surveyElement" style="display:inline-block;width:100%;">
</div>
<div id="surveyResult"></div>
<script type="text/javascript" src="./index.js"></script>
</body>
</html>
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