In this blog, we’ll learn how to identify whether the tree view is enabled or not in the SharePoint site using REST API

Syntax
REST API Endpoint:

https://SharePointSiteURL/_api/web?$select=TreeViewEnabled
REST API endpoint to use in Add_ins:

<appweburl>/_api/SP.AppContextSite(@target)/web?$select= TreeViewEnabled&@target=<hostweburl>
Embed Code Snippet:

The following code snippet can be embed in SharePoint page or in content editor web part as a script. This example is used to check whether the tree view is enabled for the SharePoint website.
  1. <script type="text/javascript" src="/SiteAssets/Scripts/jquery.min.js"></script>
  3. <script type="text/javascript">
  4. $.ajax({
  5. url: _spPageContextInfo.webAbsoluteUrl+"/_api/web?$select=treeviewenabled", //THE ENDPOINT
  6. method: "GET",
  7. headers: { "Accept": "application/json; odata=verbose" },
  8. success: function (data) {
  9. //RESULTS HERE!!
  10. console.log(data.d.TreeViewEnabled)
  11. if(data.d.TreeViewEnabled)
  12. alert('Tree view enabled on this site.');
  13. else
  14. alert('Tree view disabled on this site.');
  15. }
  16. });
  17. </script>
Add-in Code Snippet

The following code snippet is used in SharePoint Add-in to get the tree view enabled property of a SharePoint web.
  1. // Load the js files and continue to the successHandler
  2. $.getScript(scriptbase + "SP.RequestExecutor.js", execCrossDomainRequest);

  5. // Function to prepare and issue the request to get
  6. // SharePoint data
  7. function execCrossDomainRequest() {
  9. // Initialize the RequestExecutor with the add-in web URL.
  10. var executor = new SP.RequestExecutor(appweburl);
  12. // Issue the call against the add-in web.
  13. // To get the TreeViewEnabled property using REST we can hit the endpoint:
  14. // appweburl/_api/web?select=TreeViewEnabled&@target=hostweburl
  15. // The response formats the data in the JSON format.
  16. executor.executeAsync(
  17. {
  18. url: appweburl + "/_api/SP.AppContextSite(@target)/web?$select=TreeViewEnabled&@target='" + hostweburl + "'",
  19. method: "GET",
  20. headers: {
  21. "Accept": "application/json; odata=verbose"
  22. },
  23. success: successHandler,
  24. error: errorHandler
  25. }
  26. );
  27. }
  29. // Function to handle the success event.
  30. function successHandler(data) {
  31. var jsonObject = JSON.parse(data.body)
  32. //jsonObject.d.TreeViewEnabled returns true if enabled otherwise it returns false
  33. console.log('Tree view enabled on this site: ' + jsonObject.d.TreeViewEnabled);
  34. if(jsonObject.d.TreeViewEnabled)
  35. $('#message').html(‘Tree view enabled on this site.');
  36. else
  37. $('#message').html(‘Tree view disabled on this site.');
  39. }
  41. function errorHandler(data, errorCode, errorMessage) {
  42. console.log("Could not complete cross-domain call: " + errorMessage);
  43. }