There are two ways to check this - 1) browsers developer tools and 2) view the source code on your theme.
1) Using browser developer tools
To check this, inspect the Network tab in your browser and type "algolia" in the filter like below.
Here, you will find various Autocomplete HTML template files included in your theme. More information on each individual file can be read from this documentation.
2) Viewing the source code
Search for the word “hogan”. If you are using our older theme with hogan, you’ll see a lot of files.
But if you are using our new template then searching the word “hogan” will show almost nothing or close to nothing.
And if you more advanced, you can type view-source: into the URL or you can right-click and hit “view source” on your store site.
Then, you can search for template_algolia_autocomplete
With hogan has these [[ ]] square brace.
But with our new templating, we don’t use those braces.