Get to know the wonderful sp-rest-explorer website which you can use to explore all the APIs available on SharePoint.

If you want to access a state prop inside of setTimeout, use Thanks to a discussion on Github: https://github.com/facebook/react/issues/14010

You can hide the Searchbox that appears in the navigation bar using the following powershell

This blog post explores how you can theme your SharePoint Framework web parts using Office UI theme and using the controls provided by Office UI Fabric react library.

If you feel the default navigation link is boring and want to add some spice to it, then this post is for you. You can add icons and emojis to all navigation links in SharePoint, both classic and modern site collections. To add the icons, select to edit the navigation icons Then press Windows and Read

The Content Type Hub is a site collection where you can publish reusable collection of metadata (columns), workflow, behaviour, and other settings that are available to other site collections in the farm/tenant.

Take advantage of Azure AD to secure you Web APIs. Users with active accounts can seamlessly work with your applications that leverage API secured with Azure AD.

Understand how Azure AD OAuth authorization flows works. There are different types of OAuth flows depending on the kind of application.

Want to understand Application Objects and Service principals? This post will explain the differences between the two and how applications are added to Azure AD.