Check if current user is member of a SharePoint group using JQuery

Scenario

This code will help you to check if the current user is a member of a group.

Suppose you want to check if the current user is member of a Owners group or not. Just update the "grpName" variable value and run the code 😎

Steps to use the code

1. Use the Script Editor web part and add this code to check if a user is in a SP group 

2. Or use this code as a reference in a Content Editor web part

3. Use this script as a reference in a SharePoint custom list forms or in any SP pages

Code

$(document).ready(function (e) {

    ExecuteOrDelayUntilScriptLoaded(IsCurrentUserMemberOfGroup, "sp.js");
});

function IsCurrentUserMemberOfGroup() {
    var grpName = "Site Owners";
    var userInGroup;
    var currentContext = new SP.ClientContext.get_current();
    var currentWeb = currentContext.get_web();

    var currentUser = currentContext.get_web().get_currentUser();
    currentContext.load(currentUser);

    var allGroups = currentWeb.get_siteGroups();
    currentContext.load(allGroups);

    var group = allGroups.getByName(grpName);
    currentContext.load(group);

    var groupUsers = group.get_users();
    currentContext.load(groupUsers);

    currentContext.executeQueryAsync(OnSuccess, OnFailure);

    function OnSuccess(sender, args) {

        var groupUserEnumerator = groupUsers.getEnumerator();
        while (groupUserEnumerator.moveNext()) {
            var groupUser = groupUserEnumerator.get_current();
            if (groupUser.get_id() == currentUser.get_id()) {
                userInGroup = true;
                break;
            }
        }
        if (userInGroup) {
            //alert("user exists in the group");
            //do some operation.
        }

        else {
            //alert("user doestn't exist in the group");
        }

    }

    function OnFailure(sender, args) {
        //error message.
    }
}

Happy coding!!!