How do I search by a field other than the label?

By default, search matches against labelField. To search a different field, set searchField.

<Dropdown
  search
  data={users}
  labelField="name"
  valueField="id"
  searchField="email"
  placeholder="Pick a user"
  searchPlaceholder="Search by email…"
  onChange={(user) => setUser(user)}
/>

Now typing in the search box filters the list by user.email while the visible label stays as user.name.

Search across multiple fields

Pass searchField an array of keys — a row matches if any of the listed fields contains the keyword (after the same accent / whitespace normalization the single-field path uses):

<Dropdown
  search
  data={users}
  labelField="name"
  valueField="id"
  searchField={['name', 'email', 'phone']}
  searchPlaceholder="Search name, email or phone…"
  onChange={setUser}
/>

The visible label stays as user.name; the search just widens its net.

Even more control

If you need locale-aware matching, fuzzy matching, scoring, or anything else the multi-field path can't express, fall back to a custom matcher — see Custom search matcher.