Ability to open links in new window/tab, using target="_blank"

[sgoll]

This pull request adds the ability to open links in new windows or tabs (or frames or browsing contexts in HTML5), using the target attribute of the <a> tag. Basically, if target is set, we let the browser handle the transition itself (similarly to when we middle-click on a link to open it in a new tab).

See #1510 and #2188 for more discussions about this requirement.

[knowbody]

@sgoll mind adding tests for that?

[mjackson]

I'm not sure this is actually testable in our current testing stack. Our tests all run in a single tab, so testing that another tab was actually opened isn't an option.

@sgoll Thanks for the PR :)

[aberba]

Hello. I still have this issue in version "react-router-dom": "^4.2.2",. What's up? <Link to="example.com" target="_blank"... doesn't work. Neither does the tag itself.

[pshrmn]

@aberba <Link>s are for internal navigation. If you want to link to an external site, you need to use an anchor.

Also, in the future please ask questions on StackOverflow or Reactiflux as those are better suited for answering questions.