Updated documentation for basename?

[chrylis]

I am trying to configure my app with a basename, but it looks like the documentation has vanished. Multiple places link to BasenameSupport.md (e.g., API.md), but it's 404.

[pshrmn]

@chrylis Assuming you are using RR v2/v3, try https://github.com/mjackson/history/blob/v2.x/docs/BasenameSupport.md. For v4 basenames are set in the Router components.

There are a few other links that seem to be affected by this. Fixing should just be a matter of updating links that point to /history/blob/master/ to /history/blob/v2.x/.

[nareshbhatia]

In the link provided above, it says:

In HTML documents, you can use the element's href attribute to specify a basename for the page. This way, you don't have to manually pass the basename property to your createHistory function.

Does this mean that it is ok to use the <base> tag now? RR v2 gives a warning if I do that but RR v3 does not.

Also reading the documentation, it is not clear what issue is basename solving vs. <base> tag. When do I use one vs. the other?