Pop Up On Load SharePoint 2013

Question

I am trying to get a modal to appear when the site loads.

• I created a site page called Disclaimer.aspx and stored it in the Site Pages document library.
• I created a text document called popup.txt and stored it in my Shared Documents.
• I added a content editor webpart to my home screen and linked it to the popup.txt file

Onload the page displays the modal however, the Disclaimer.aspx page isn't showing. I am getting a Error: An unexpected error has occurred

Contents of popup.txt:

 <SharePoint:ScriptLink ID="ScriptLink21" Name="sp.js" runat="server" OnDemand="true" 

Localizable="false" />

<script type="text/ecmascript">
    ExecuteOrDelayUntilScriptLoaded(ShowDialog, "sp.js");

    function ShowDialog() {

        var options = {
                url: '../SitePages/Disclaimer.aspx',
                height: 500,
        };

        SP.UI.ModalDialog.showModalDialog(options);
    }
</script>

I tried the code with the full path and I get the same error.

Answer 1

You should first ensure that the Disclaimer.aspx is not a wiki page it should be web part page to avoid An unexpected error has occurred ,

If everything is OK , try to add the following code at your CEWP

<a href="#" onclick="javascript:SP.UI.ModalDialog.showModalDialog({ url: '../SitePages/Disclaimer.aspx', title: 'Disclaimer' }); return false;"  >Click Here</a>

Also, you can try to use the following code

 <script>
function openDialog(pageUrl) { 
var options = {
    url: pageUrl,
    title: 'Title of the Dialog',
    allowMaximize: false,
    showClose: true,
    width: 500,
    height: 500
};
SP.SOD.execute('sp.ui.dialog.js', 'SP.UI.ModalDialog.showModalDialog', options);       
}

</script> 
<a href="#" onclick="openDialog('http://path/SitePages/Disclaimer.aspx');">Disclaimer</a>

Both samples have been worked for me without issue ,

Check also the detail steps at Open a link via Modal Dialog in SharePoint

Answer 2

Remove the below from popup.txt since these tags don't work\belong here

SharePoint:ScriptLink ID="ScriptLink21" Name="sp.js" runat="server" OnDemand="true" Localizable="false" />

Add the sp.js explicitly using script> tag