Now that the SharePoint Framework is released, here is how you would build your jQuery solution as a Client Side Web Part.
For every Client-Side Web Part that we build using the SharePoint Framework we can specify the icon to make it easily distinguishable amongst other Web Parts visible in the toolbox.
Seeing the changes to your Web Part properties immediately is great, but is it what you really want for every single scenario?
In the past you might have built SharePoint Web Parts using jQuery and jQuery plugins loaded from a CDN. Now that the SharePoint Framework is released, here is how you would build your solution as a Client-Side Web Part.
Learn how to migrate your existing client-side SharePoint solutions to the SharePoint Framework. Based on a sample Web Part built using Angular.