holiday-api/templates/dialogs/add-holiday.gohtml

<dialog class="card" id="create-card">
    <h3 class="card-title">Create holiday</h3>
    <form method="post" action="/admin/holidays">
        <section>
            <label for="country">Country:</label>
            <select id="country" required name="country">
                {{range $entry := .Countries}}
                    <option value="{{$entry.IsoName}}">{{$entry.Name}}</option>
                {{end}}
            </select>
        </section>
        <section>
            <label for="name">Name:</label>
            <input required id="name" name="name" type="text">
        </section>
        <section>
            <label for="description">Description:</label>
            <textarea id="description" name="description"></textarea>
        </section>
        <section>
            <label for="date">Date:</label>
            <input required id="date" name="date" type="date">
        </section>
        <section>
            <label class="checkbox"><span>State holiday</span><input id="state_holiday" value="true" name="state_holiday" type="checkbox"></label>
        </section>
        <section>
            <label class="checkbox"><span>Religious holiday</span><input id="religious_holiday" value="true" name="religious_holiday" type="checkbox"></label>
        </section>
        <section class="actions">
            <button type="submit">Create</button>
            <button type="button" onclick="closeDialog('#create-card')">Cancel</button>
        </section>
    </form>
</dialog>