SharePoint Framework - Retrieve User Profile Information

User Profile service in SharePoint is useful to store information related to users. SharePoint out of box provides various user profile properties to denote user attributes (e.g. Id, First Name, Last Name, Manager, etc.). We can also create our own custom user profile properties. In this article, we will explore how to retrieve the user profile information. We will use ReactJS in this example.

source https://www.c-sharpcorner.com/article/sharepoint-framework-retrieve-user-profile-information/