Example of using onServerValidateQuestions callback, Knockoutjs Survey Library Example

Server Validators

Open in new window

Export Pdf

Result
JavaScript
HTML
QR Code


                        
        
            Survey.StylesManager.applyTheme("modern");
        

//assign call to onServerValidateQuestions callback
function surveyValidateQuestion(survey, options) {
    //options.data contains the data for the current page.
    var countryName = options.data["country"];
    //If the question is empty then do nothing
    if (!countryName) {
        options.complete();
        return;
    }
    //call the ajax method
    $.ajax({
        url: "https://restcountries.eu/rest/v2/all"
    }).then(function (data) {
        var found = false;
        var countries = data;
        for (var i = 0; i < countries.length; i++) {
            if (countries[i].name == countryName) {
                found = true; break;
            }
        }
        //if the country is unknown, add the error
        if (!found) options.errors["country"] = "The country name '" + countryName +"' is not in this list: https://restcountries.eu/rest/v2/all";
        //tell survey that we are done with the server validation
        options.complete();
    });
}
            
                var json = {
    questions: [{ type: "text", name: "country", title: "Type a country:" }]
};

                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
    .onServerValidateQuestions
    .add(surveyValidateQuestion);            
                survey.render("surveyElement");

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Example of using onServerValidateQuestions callback, Knockoutjs Survey Library Example</title>

<meta name="viewport" content="width=device-width" />
    <script src="https://unpkg.com/jquery"></script>
    <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/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>

Server Validators

Example of using onServerValidateQuestions callback

Why We Use Cookies