rustdoc: Cannot go back page when enable "I'm feeling lucky" setting

[tesuji]

Enable "Directly go to item in search if there is only one result" option on Settings

Search an unique item in search box generated by rustdoc, it will lead you to the doc of that item.
Click the go back button in browser, the page will change to previous search result and go forward
to the doc of the searched item.

How to reproduce the issue:

• Go to std doc: https://doc.rust-lang.org/nightly/std/index.html
• Search for "PhantomData"
• Click the go back button in browser.

Meta

rustc --version --verbose: 1.47.0-nightly (e15510c 2020-08-20)

cc @GuillaumeGomez

[GuillaumeGomez]

Well, you can but since there is only one result, it puts you back haha. (Ok, we can consider it as bug, but it's a funny one)

[workingjubilee]

The single search result page can be elided using the History API to disappear it, leaving the back button to take you to before the search. I believe this would be the desired behavior?

[Lonami]

What about detecting the key release to check if there's a single item and redirect, instead of redirecting after calculating the results?