Completely Sign out in SharePoint 2013

How to Completely Sign out in SharePoint 2013

Step1: Create a page and add Script Editor Web Part to it.

Step2: Paste the below code to this web part.

Code: 

<script type="text/javascript">

function SignOut() {

debugger;

alert("Hi")

if (typeof SP !== 'undefined') {

    var ctx = new SP.ClientContext.get_current();

    var site = ctx.get_site();

    ctx.load(site, 'Url');

    ctx.executeQueryAsync(Function.createDelegate(this, function (sender, args) {

        var url = site.get_url();

        window.location = url + '/_layouts/closeConnection.aspx?loginasanotheruser=true';

    }), Function.createDelegate(this, function (sender, args) {

        alert('Error: ' + args.get_message());

    }));

} else {

    alert('Error: This is not a SharePoint 2010 or 2013 website');

}

}

</script>

<input type="button" value="SignOut" onclick="SignOut()" />

Here i have write the code to completely sign out in SharePoint 2013 on button Click Event.