Enabling The Developer Site Collection Feature SharePoint Online Office 365 -CSOM

This blog will help you to enable the development feature in SharePoint 2013, using JSOM.
In SharePoint 2013, we have a new site template called Developer Site Template. It is a site template, which is used extensively for app development and you can only deploy apps for SharePoint to a Developer Site.

I have a scenario, where I need to enable the Developer Site Collection feature for an existing Site Collection, which may be a team site or publishing site. There isn't a button in Site Collection features which allows you to enable this.

If you were on SharePoint 2013 On-Premises, you’d just run Enable-SPFeature, which is shown below.
  1. Enable-SPFeature e374875e-06b6-11e0-b0fa-57f5dfd72085 –url http://gowthamr.sharepoint.com  
With SharePoint Online, we can't do this directly, so I have created a simple method to solve this. We can run this script in our Internet Browser console.
  1. <script>  
  2. $(document).ready(function () {  
  3.   
  4. var featureID="e374875e-06b6-11e0-b0fa-57f5dfd72085";  
  5. ActivateFeature(featureID);  
  6.   
  7. });  
  8.   
  9. function ActivateFeature(featureGuid)  
  10. {  
  11. var clientContext = new SP.ClientContext.get_current();  
  12. var site = clientContext.get_site();  
  13. var guid = new SP.Guid('{'+featureGuid+'}');  
  14.   
  15. var featDef = site.get_features().add(guid, false, SP.FeatureDefinitionScope.site);  
  16.   
  17. clientContext.executeQueryAsync(Function.createDelegate(thisthis.OnSuccess), Function.createDelegate(thisthis.OnFail));  
  18. }  
  19.   
  20. function OnSuccess(sender, args) {  
  21.     alert('Successfully enabled Developement feature!');  
  22. }  
  23.   
  24. function OnFail(sender, args) {  
  25.     alert('Fail: ' + args.get_message() + '\n' + args.get_stackTrace());  
  26. }  
  27.   
  28. </script>  
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