holiday-api/templates/dialogs/check-is-a-holiday.gohtml

<dialog class="card" data-closeable id="check-is-a-holiday">
    <div style="display: flex;">
        <h2 style="margin-right: 1em;">Is it a holiday?</h2>
        <button onclick="closeDialog('#check-is-a-holiday')" class="clean icon"><img class="icon" src="/assets/icons/close-x.svg"></button>
    </div>
    <form method="get" action="/search">
        <section>
            <label for="country">Country:</label>
            <select id="country" name="country">
                {{range $entry := .Countries}}
                    <option value="{{$entry.IsoName}}">{{$entry.Name}}</option>
                {{end}}
            </select>
        </section>
        <section>
            <label for="date">Date:</label>
            <input id="date" name="date" type="date" required>
        </section>
        <section class="actions">
            <button style="width: 100%;" type="submit">Check is a holiday</button>
        </section>
    </form>
</dialog>