Remove properties

Remove a property explicity or use an event

                        //remove a property to the page object. You can't set it in JSON as well
Survey.JsonObject.metaData.removeProperty("page", "visibleIf");
//remove a property from the base question class and as result from all questions 
Survey.JsonObject.metaData.removeProperty("questionbase", "visibleIf");



var editorOptions = { };
var editor = new SurveyEditor.SurveyEditor("editorElement", editorOptions);

editor.onCanShowProperty.add(function(sender, options){
    if(options.obj.getType() == "survey") {
        options.canShow = options.property.name == "title";
    }
});
                    
<!DOCTYPE html>
<html>
<head>
    <title>Remove a property explicity or use an event, Online Survey Builder Example</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.3.0/knockout-min.js"></script>
<script src="https://surveyjs.azureedge.net/1.0.9/survey.ko.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.2.0/ace.min.js" type="text/javascript" charset="utf-8"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.2.0/ext-language_tools.js" type="text/javascript" charset="utf-8"></script>
    <!-- Uncomment to enable Select2
    <script src="https://unpkg.com/jquery"></script>
    <link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css" rel="stylesheet" />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"></script>
    -->
    <link href="https://surveyjs.azureedge.net/1.0.9/surveyeditor.css" type="text/css" rel="stylesheet" />
    <script src="https://surveyjs.azureedge.net/1.0.9/surveyeditor.js"></script>
    <link rel="stylesheet" href="https://unpkg.com/bootstrap@3.3.7/dist/css/bootstrap.min.css">
    <link rel="stylesheet" href="./index.css">

</head>
<body>
        <div id="surveyContainer">
        <div id="editorElement"></div>
    </div>

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

</body>
</html>


Removing/hiding properties

Removing a property, will remove the value of this property from objects. This value could not be stored/load into/from JSON.

If you want only to hide the property from UI, then use onCanShowProperty event.

Please note, that the property will be removed/hidden from property editor and from question editor as well.