var json = {
  "pages": [
      "name": "page1",
      "elements": [
          "type": "ranking",
          "name": "smartphone-features",
          "title": "Please rank the following smartphone features in order of importance:",
          "isRequired": true,
          "choices": [
            "Battery life",
            "Screen size",
            "Storage space",
            "Camera quality",
            "Processor power",
      "name": "page2",
      "elements": [
          "type": "checkbox",
          "name": "car",
          "isRequired": true,
          "title": "What cars have you being drived?",
          "colCount": 4,
          "choicesOrder": "asc",
          "choices": [
          "type": "ranking",
          "name": "bestcar",
          "isRequired": true,
          "visibleIf": "{car.length} > 1",
          "title": "What car did you enjoy the most?",
          "choicesFromQuestion": "car",
          "choicesFromQuestionMode": "selected"

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

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

<body style="margin: 0">
            <div id="surveyElement" style="display:inline-block;width:100%;">
                    <survey params="survey: model"></survey>
    <div id="surveyResult"></div>

<script type="text/javascript" src="./index.js"></script>

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