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                    var json = {
  "elements": [
      "type": "matrix",
      "name": "Quality",
      "title": "Please indicate if you agree or disagree with the following statements",
      "columns": [
          "value": 1,
          "text": "Strongly Disagree"
          "value": 2,
          "text": "Disagree"
          "value": 3,
          "text": "Neutral"
          "value": 4,
          "text": "Agree"
          "value": 5,
          "text": "Strongly Agree"
      "rows": [
          "value": "affordable",
          "text": "Product is affordable"
          "value": "does what it claims",
          "text": "Product does what it claims"
          "value": "better then others",
          "text": "Product is better than other products on the market"
          "value": "easy to use",
          "text": "Product is easy to use"

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

<!DOCTYPE html>
<html lang="en">
    <title>Matrix, Knockoutjs Survey Library Example</title>
<meta name="viewport" content="width=device-width" />
    <script src=""></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/modern.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%;">
    <div id="surveyResult"></div>

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


var q = survey.getQuestionByName('questionname'); 
q.isAllRowRequired = yourValue;

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Approximate time to complete: 2 min.