Tech Report: Create searchable dropdowns for categories and technologies

[sarahfossheim]

Currently the categories and technologies dropdowns are a <select> element and have a very long list of options. This becomes difficult to find the correct option, so will need to be updated to a searchable list.

There are two options, either:

• datalist: which matches the search query with any position in the options (not just the start of the string, like the select element) and automatically filters the list. But it does come with some accessibility issues.
• Custom component that combines a search field with a filterable list of selectable options. This gives us full control over the way it works (and the styling, accessibility, etc), but requires a bit more code.