In this blog you will see how to check if the user exists in a particular SharePoint group using ECMAScript.
  1. <script type="text/javascript">
  2. ExecuteOrDelayUntilScriptLoaded(IsUserExists, "sp.js");
  4. var group;
  5. var users;
  6. var ctx;
  7. var groupCollection;
  8. var user;
  9. var currentuser;
  11. function IsUserExists() {
  12. ctx = SP.ClientContext.get_current();
  13. groupCollection = ctx.get_web().get_siteGroups();
  14. currentuser=ctx.get_web().get_currentUser();
  15. group = groupCollection.getById(4103);
  16. ctx.load(group);
  17. ctx.load(currentuser);
  18. ctx.executeQueryAsync(Function.createDelegate(this, this.OnGetGroupSuccess), Function.createDelegate(this, OnFailure));
  19. }
  21. function OnGetGroupSuccess() {
  22. users=group.get_users();
  23. ctx.load(users);
  24. ctx.executeQueryAsync(Function.createDelegate(this, this.OnGetuserSuccess), Function.createDelegate(this, OnFailure));
  25. }
  27. function OnGetuserSuccess() {
  28. var userEnumerator = users.getEnumerator();
  29. while (userEnumerator.moveNext()) {
  30. var user = userEnumerator.get_current();
  31. if (user.get_id() == currentuser.get_id()) {
  32. alert("User Exists")
  33. break;
  34. }
  35. else
  36. {
  37. }
  38. }
  39. }
  41. function OnFailure(sender, args) {
  42. alert("Failed to execute IsCurrentUserMemberOfGroup method");
  43. }
  44. </script>