Instantsearch.js: `connectInfiniteHits` doesn't support routing

[francoischalifour]

Describe the bug 🐛

connectInfiniteHits doesn't implement getWidgetState() and getWidgetSearchParameters() to support routing (introduced in #2829).

As a result, it's not possible to retrieve the page number for the router on the hits (except when having another widget mounted, such as pagination).

To Reproduce 🔍

Steps to reproduce the behavior:

1. Go to this sandbox
2. Scroll down to "Show more results"
3. Click on "Show more results"
4. Notice that the URL doesn't change (the page doesn't appear)
5. Uncomment the pagination widget line 39
6. Reiterate steps 2-3
7. The URL does update with the page number

Expected behavior 💭

The page number should be accessible without the pagination widget.

Environment:

• InstantSearch.js ≤ 2.10.4

[samouss]

I don't think the connectHits connector is a concern for this issue since it doesn't let the user refine the page. Only the connectInfiniteHits connector have this feature. Did I miss something?

[francoischalifour]

Indeed, I edited the issue.

[samouss]

Fixed in 3.4.0 with the introduction of the previous button on infiniteHits.

https://github.com/algolia/instantsearch.js/blob/fa02bed4eefbb40365d74a1f35dfd4adf32f6758/src/connectors/infinite-hits/connectInfiniteHits.ts#L232-L253