Server Validators


                        
        
            Survey.StylesManager.applyTheme("defaultV2");
        

//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://surveyjs.io/api/CountriesExample?name=" + countryName}).then(function (data) {
        var found = data.length > 0;
        //if the country is unknown, add the error
        if (!found) options.errors["country"] = "The country name '" + countryName +"' is not in this list: https://surveyjs.io/api/CountriesExample";
        //tell survey that we are done with the server validation
        options.complete();
    });
}

                
                    var json = {
  "elements": [
    {
      "type": "text",
      "name": "country",
      "title": "Type a country:"
    }
  ]
};

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

                    
<!DOCTYPE html>
<html lang="en">
<head>
    <title>Server Validators, 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-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 href="/DevBuilds/survey-core/defaultV2.min.css" type="text/css" rel="stylesheet" />
    <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>

Why we use cookies.

This site uses cookies to make your browsing experience more convenient and personal. Cookies store useful information on your computer to help us improve the efficiency and relevance of our site for you. In some cases, they are essential to making the site work properly. By accessing this site, you consent to the use of cookies.

For more information, refer to DevSoft Baltic’ privacy policy and cookie policy.