List and map together

The search-results pattern Airbnb, Zillow and most marketplaces use takes three wires:

User does	Map does	Code
Hovers a card in the list	Lifts that card’s marker	`map.highlight(id)` / `map.highlight(null)`
Clicks a marker	Opens its card, and the list scrolls to the matching item	`select` event
Pans or zooms	The list shows what’s in view	`moveend` event + `map.bounds`

HTML / JS
React

<div class="results">
  <ol id="list"></ol>
  <instant-map id="map" center="-97.7431,30.2672" zoom="12"></instant-map>
</div>

<style>
  .results { display: grid; grid-template-columns: 420px 1fr; height: 100dvh; }
  #list { overflow: auto; margin: 0; padding: 16px; }
  #list li[aria-current="true"] { outline: 2px solid #1c1f24; }
  #map { height: 100%; }
  @media (max-width: 800px) { .results { grid-template-columns: 1fr; grid-template-rows: 45dvh 1fr; } #map { order: -1; } }
</style>

<script type="module">
  import "https://instantmap.org/instant-map.js";

  const listings = await (await fetch("/api/listings")).json();
  const map = document.getElementById("map");
  const list = document.getElementById("list");

  map.markers = listings.map((l) => ({ id: l.id, lng: l.lng, lat: l.lat, label: `$${l.price}`, title: l.title, image: l.photo, href: `/listings/${l.id}` }));

  function render() {
    const [west, south, east, north] = map.bounds;
    const visible = listings.filter((l) => l.lng >= west && l.lng <= east && l.lat >= south && l.lat <= north);
    list.replaceChildren(...visible.map((l) => {
      const item = document.createElement("li");
      item.id = `listing-${l.id}`;
      item.innerHTML = `<a href="/listings/${l.id}">${l.title}, $${l.price}</a>`;
      item.addEventListener("pointerenter", () => map.highlight(l.id));
      item.addEventListener("pointerleave", () => map.highlight(null));
      return item;
    }));
  }

  map.addEventListener("moveend", render);
  map.addEventListener("select", (event) => {
    const id = event.detail.marker?.id;
    for (const item of list.children) item.toggleAttribute("aria-current", item.id === `listing-${id}`);
    document.getElementById(`listing-${id}`)?.scrollIntoView({ block: "nearest", behavior: "smooth" });
  });
  render();
</script>

"use client";
import { useMemo, useRef, useState } from "react";
import { InstantMap, type InstantMapHandle } from "instantmap-js/react";
import type { Bounds } from "instantmap-js";

export function SearchResults({ listings }: { listings: Listing[] }) {
  const map = useRef<InstantMapHandle<Listing>>(null);
  const [bounds, setBounds] = useState<Bounds | null>(null);
  const [selected, setSelected] = useState<string | null>(null);

  const markers = useMemo(
    () => listings.map((l) => ({ id: l.id, lng: l.lng, lat: l.lat, label: `$${l.price}`, title: l.title, image: l.photo, href: `/listings/${l.id}`, data: l })),
    [listings],
  );
  const visible = bounds
    ? listings.filter((l) => l.lng >= bounds[0] && l.lng <= bounds[2] && l.lat >= bounds[1] && l.lat <= bounds[3])
    : listings;

  return (
    <div className="grid h-dvh grid-cols-[420px_1fr]">
      <ol className="overflow-auto p-4">
        {visible.map((l) => (
          <li
            key={l.id}
            id={`listing-${l.id}`}
            aria-current={selected === l.id}
            onPointerEnter={() => map.current?.highlight(l.id)}
            onPointerLeave={() => map.current?.highlight(null)}
          >
            <a href={`/listings/${l.id}`}>{l.title}, ${l.price}</a>
          </li>
        ))}
      </ol>
      <InstantMap
        ref={map}
        center={[-97.7431, 30.2672]}
        zoom={12}
        markers={markers}
        style={{ height: "100%" }}
        onMoveEnd={() => setBounds(map.current?.bounds ?? null)}
        onSelect={(marker) => {
          setSelected(marker ? String(marker.id) : null);
          if (marker) document.getElementById(`listing-${marker.id}`)?.scrollIntoView({ block: "nearest", behavior: "smooth" });
        }}
      />
    </div>
  );
}

Details that matter

Highlight, don’t select, on hover. highlight() only lifts the pin. select() opens a card, and opening cards as the pointer crosses a list is noisy.
A highlighted marker inside a cluster lifts the whole cluster, so the visitor still sees where it is.
Show all results after a search: map.fitBounds(markers, { padding: 64 }).
On phones, stack the map above the list at 40–50% of the viewport height. Keep the map’s scroll-zoom at cooperative so the page still scrolls past it.