Search Block: Option to have live suggested results or word auto-completion

[bhubbard]

What problem does this address?

It is a common pattern to have a search box that has a dropdown containing suggested words, or a small sample actual results as you type in the box.

What is your proposed solution?

• Offer a setting to provide a list of suggested auto-complete words as a list.
• Offer a setting to enable a dropdown of live results, with a field to set the number of return results in the dropdown (3, 5, 10, etc).

[cbirdsong]

This can be done without client-side Javascript by using <datalist>. In the past I've attached one to a search box and populated it with the site's tags and categories.

[t-hamano]

Note that there is an effort to implement the instant search support for the Query and Search blocks:

• Query and Search blocks: support for Instant Search #63053
• Query and Search blocks: support for Instant Search via query_loop_block_query_vars filter #67181