Add the React Bootstrap Framework to your SharePoint client-side web part

I originally wrote this to submit to the SharePoint Developer Documentation website but they pointed out that:

Article is valid and works great, but since we want to promote Office UI Fabric as the official platform from product perspective, we do not feel good on having then conflicting article in the official product documentation with alternative solution.

Technically using bootstrap is absolutely a valid solution and you can certainly take advantage of that in custom client-side web parts or with other solutions built with SPFx, but since these articles will be published in the official documentation, merging this in does not seem like the right thing to do.

To which I say fair points and thank you for the helpful response.  The article itself is still valid and if you need to integrate bootstrap with SPFx, which I do, then hopefully it will be of use to you.

This involves creating a new web part, as shown in the following image.