Comment

Multiple line text - Comment question 

                        

    
        Survey.StylesManager.applyTheme("default");
    


var json = {questions:[{ type: "comment", name: "suggestions", title:"What would make you more satisfied with the Product?" }]};

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.render("surveyElement");


                    
<!DOCTYPE html>
<html>
<head>
    <title>Multiple line text - Comment question, Knockoutjs Survey Library Example</title>


    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.0/knockout-min.js"></script>
<script src="https://surveyjs.azureedge.net/1.1.6/survey.ko.js"></script>
<link href="https://surveyjs.azureedge.net/1.1.6/survey.css" type="text/css" rel="stylesheet" />
    <link rel="stylesheet" href="./index.css">

</head>
<body>
                <div id="surveyElement">
            </div>
    <div id="surveyResult"></div>

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

</body>
</html>

Rows: (default is 3) 

var q=survey.getQuestionByName('suggestions');
q.rows = yourvalue;
survey.render();"