When visiting a link containing a targeted hash component, the select is opened

[igneosaur]

If a link is navigated to that contains a hash that targets the autocomplete component, the component is opened. The behaviour cannot be seen if navigating within the same page but navigation from another location will open the dropdown.

This is a pretty low-level bug but our testers noticed this during accesibility testing and the behaviour diverges from the default select element behaviour, which is to focus but not open.

Steps to reproduce

Visit the following link https://alphagov.github.io/accessible-autocomplete/examples/#autocomplete-defaultValue.

Observe that the select box is not only focussed (expected) but opened (not expected).

[igneosaur]

I might be able to get to this and have a little poke around but thought I'd make this issue to track it and to maybe start a discussion if there is any relevant knowledge about.