One choice - Dropdown question. Get the choices from a restfull service., jQuery Survey Library Example

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            Survey.StylesManager.applyTheme("modern");
        


            
                var json = { elements: [
  {
    type: "dropdown",
    name: "country",
    title: "Select the country...",
    isRequired: true,
    choicesByUrl: {
      url: "https://restcountries.eu/rest/v2/all",
      valueName: "name"
    }
  },
  {
    type: "panel",
    name: "panel_countriesByRegion",
    title: "Show countries by region",
    elements: [{
    type: "dropdown",
    name: "region",
    title: "Select the region...",
    choices: ["Africa", "Americas", "Asia", "Europe", "Oceania"]
  }, {
    type: "dropdown",
    name: "reg_country",
    title: "Select the country...",
    isRequired: true,
    choicesByUrl: {
      url: "https://restcountries.eu/rest/v2/region/{region}",
      valueName: "name"
    }
  }]
  }

]};

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

<!DOCTYPE html>
<html lang="en">
<head>
    <title>One choice - Dropdown question. Get the choices from a restfull service., jQuery Survey Library Example</title>

<meta name="viewport" content="width=device-width" />
    <script src="https://unpkg.com/jquery"></script>
<script src="https://surveyjs.azureedge.net/1.5.18/survey.jquery.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

Link to a restufull service:

var q = survey.getQuestionByName('country');
q.choicesByUrl.url = 'http://yourrestfullserviceurl';
q.choicesByUrl.run();

The path to the array of results in the returned json:

var q = survey.getQuestionByName('country');
q.choicesByUrl.path = 'MyPathToTheResult';
q.choicesByUrl.run();

The 'value' element name in the returned json:

var q = survey.getQuestionByName('country');
q.choicesByUrl.valueName = 'thePropertyNameForValue';
q.choicesByUrl.run();

The 'title' element name in the returned json (if empty, the value is used):

var q = survey.getQuestionByName('country');
q.choicesByUrl.titleName = 'thePropertyNameForTitle';
q.choicesByUrl.run();

Dropdownrestfull

One choice - Dropdown question. Get the choices from a restfull service.

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