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How to display List item value on suiteBarTop having in sharepoint Online using JSOM

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Hi Team

I am trying to diplay some alert message on Top Nav bar in Sharepoint Online using JSOM.

html code:

    

<!DOCTYPE html>

<style>
    #O365_NavHeader {
        background-color: #b11313f0 !important;
    }

    #sideNavBox {
        display: none;
    }

    #71hjFgizWk0Cd55RzerwA {
        color: #FFFFFF;
        background-color: #b11313f0;
        font-size:x-large;
    }

</style>

<script type="text/javascript" src="/sites/Test/SiteAssets/scripts/jquery-1.11.1.js"></script>
<script type="text/javascript" src="https://code.jquery.com/jquery-1.7.1.min.js"></script>
<script type="text/javascript" src="/sites/Test/SiteAssets/scripts/Display.js"></script>

<div id="heading">
    <h1>Alert Message on TOP </h1>
</div>


<div class="71hjFgizWk0Cd55RzerwA">
</div>

JS Code:

     
            $(document).ready(function () {
                ExecuteOrDelayUntilScriptLoaded(getValue, "sp.js");
            });
            var colltaskListItem;
            function getValue()
            {
                var clientContext = new SP.ClientContext.get_current();
                var oList = clientContext.get_web().get_lists().getByTitle('Alert');
                var camlQuery = new SP.CamlQuery();
                //camlQuery.set_viewXml{

                   
                //};
                colltaskListItem = oList.getItems(camlQuery);
                clientContext.load(colltaskListItem);
                clientContext.executeQueryAsync(onSuccess, onFailure);
            }
            function onSuccess()
            {
                var allIndustries='';
                var listItemEnumerator = colltaskListItem.getEnumerator();
                while (listItemEnumerator.moveNext())
                {
                        var oListItem = listItemEnumerator.get_current();
                        var displayText = oListItem.get_item('Title');
                }
                $("#71hjFgizWk0Cd55RzerwA").html(displayText);
            }
            function onFailure()
           {
                alert('Some error occurred');
            }

Can Some one correct this where I am doing wrong.. I want to display the text in  between this..

<div class="_71hjFgizWk0Cd55RzerwA">  {message should display here}  </div>


Ganesh


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