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Leaflet Map Picker - Dokumentasi

Komponen reusable untuk memilih lokasi menggunakan Leaflet Maps dengan fitur pencarian dan reverse geocoding.

Fitur

🗺️ Interactive map dengan OpenStreetMap
🔍 Pencarian lokasi dengan Nominatim API
📍 Click-to-select koordinat
🏠 Reverse geocoding untuk mendapatkan alamat otomatis
📱 Responsive design
⚡ Mudah dikonfigurasi dan reusable

Instalasi

1. Include CSS dan JavaScript

Tambahkan di section Styles dan Scripts pada view Anda:

@section Styles {
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
    <link rel="stylesheet" href="~/css/leaflet-map-picker.css" />
}

@section Scripts {
    <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
    <script src="~/js/leaflet-map-picker.js"></script>
}

Penggunaan

Metode 1: Menggunakan Partial View (Recommended)

Langkah 1: Tambahkan Input Fields untuk Latitude dan Longitude

<fieldset class="fieldset">
    <legend class="fieldset-legend">Latitude</legend>
    <input type="number" step="any" class="input" id="latitude-input" name="latitude" placeholder="Latitude" />
</fieldset>

<fieldset class="fieldset">
    <legend class="fieldset-legend">Longitude</legend>
    <input type="number" step="any" class="input" id="longitude-input" name="longitude" placeholder="Longitude" />
</fieldset>

Langkah 2: Include Partial View

<div class="mt-6">
    @{
        ViewData["MapId"] = "map-picker";
        ViewData["LatInputId"] = "latitude-input";
        ViewData["LngInputId"] = "longitude-input";
        ViewData["SearchInputId"] = "search-location";
        ViewData["SearchResultsId"] = "search-results";
        ViewData["ClearSearchBtnId"] = "clear-search";
        ViewData["Label"] = "Pilih Lokasi di Peta";
    }
    @await Html.PartialAsync("_LeafletMapPicker")
</div>

Langkah 3: Initialize JavaScript Component

@section Scripts {
    <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
    <script src="~/js/leaflet-map-picker.js"></script>
    <script>
        window.leafletMapPickerInstance = new LeafletMapPicker({
            mapElementId: 'map-picker',
            latInputId: 'latitude-input',
            lngInputId: 'longitude-input',
            searchInputId: 'search-location',
            searchResultsId: 'search-results',
            clearSearchBtnId: 'clear-search',
            alamatInputSelector: 'textarea[name="alamat_lengkap"]', // Optional
            initialLat: -6.2088,
            initialLng: 106.8456,
            initialZoom: 12
        });
    </script>
}

Metode 2: HTML Manual

<div class="leaflet-map-picker-container">
    <label class="text-sm font-semibold text-gray-700 mb-2 block">
        <i class="ph ph-map-pin me-2"></i>
        Pilih Lokasi di Peta
    </label>

    <!-- Search Box -->
    <div class="leaflet-map-picker-search">
        <div class="relative">
            <input
                type="text"
                id="search-location"
                class="input leaflet-map-picker-search-input"
                placeholder="Cari lokasi (nama tempat, alamat, kota)..."
                autocomplete="off"
            />
            <i class="ph ph-magnifying-glass leaflet-map-picker-search-icon"></i>
            <button
                type="button"
                id="clear-search"
                class="leaflet-map-picker-clear-btn hidden"
            >
                <i class="ph ph-x"></i>
            </button>
        </div>
        <div id="search-results" class="leaflet-map-picker-results hidden"></div>
    </div>

    <div id="map-picker" class="leaflet-map-picker"></div>
    <p class="leaflet-map-picker-help-text">
        <i class="ph ph-info me-1"></i>
        Cari lokasi menggunakan search box di atas, atau klik pada peta untuk menentukan lokasi secara manual
    </p>
</div>

Konfigurasi Options

Option	Type	Default	Deskripsi
`mapElementId`	string	`'map-picker'`	ID elemen untuk map container
`latInputId`	string	`'latitude-input'`	ID input field untuk latitude
`lngInputId`	string	`'longitude-input'`	ID input field untuk longitude
`searchInputId`	string	`'search-location'`	ID input field untuk search box
`searchResultsId`	string	`'search-results'`	ID elemen untuk search results dropdown
`clearSearchBtnId`	string	`'clear-search'`	ID button untuk clear search
`alamatInputSelector`	string	`null`	CSS selector untuk input alamat (optional)
`initialLat`	number	`-6.2088`	Latitude awal map (Jakarta)
`initialLng`	number	`106.8456`	Longitude awal map (Jakarta)
`initialZoom`	number	`12`	Zoom level awal
`maxZoom`	number	`18`	Maximum zoom level
`minZoom`	number	`4`	Minimum zoom level
`searchDebounceMs`	number	`500`	Debounce delay untuk search (ms)
`countryCode`	string	`'id'`	Country code untuk filter pencarian
`language`	string	`'id'`	Language untuk API results

ViewData Options untuk Partial View

Key	Type	Default	Deskripsi
`MapId`	string	`'map-picker'`	ID untuk map element
`LatInputId`	string	`'latitude-input'`	ID untuk latitude input
`LngInputId`	string	`'longitude-input'`	ID untuk longitude input
`SearchInputId`	string	`'search-location'`	ID untuk search input
`SearchResultsId`	string	`'search-results'`	ID untuk search results
`ClearSearchBtnId`	string	`'clear-search'`	ID untuk clear button
`Label`	string	`'Pilih Lokasi di Peta'`	Label text
`HelpText`	string	Default help text	Help text di bawah map
`ShowLabel`	bool	`true`	Tampilkan label
`ShowSearch`	bool	`true`	Tampilkan search box
`ShowHelpText`	bool	`true`	Tampilkan help text

Public API Methods

`getCoordinates()`

Mendapatkan koordinat saat ini.

const coords = leafletMapPickerInstance.getCoordinates();
console.log(coords); // { lat: -6.2088, lng: 106.8456 }

`setCoordinates(lat, lng, updateMarker = true)`

Set koordinat secara programmatic.

leafletMapPickerInstance.setCoordinates(-6.2088, 106.8456, true);

`destroy()`

Clean up instance dan event listeners.

leafletMapPickerInstance.destroy();

Contoh Lengkap

@{
    ViewData["Title"] = "Edit Lokasi";
}

@section Styles {
    <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" />
    <link rel="stylesheet" href="~/css/leaflet-map-picker.css" />
}

<form method="post">
    <div class="grid grid-cols-2 gap-4">
        <fieldset class="fieldset">
            <legend class="fieldset-legend">Latitude</legend>
            <input type="number" step="any" class="input" id="latitude-input" name="latitude" value="-6.2088" />
        </fieldset>

        <fieldset class="fieldset">
            <legend class="fieldset-legend">Longitude</legend>
            <input type="number" step="any" class="input" id="longitude-input" name="longitude" value="106.8456" />
        </fieldset>
    </div>

    <fieldset class="fieldset">
        <legend class="fieldset-legend">Alamat</legend>
        <textarea class="textarea" name="alamat_lengkap" placeholder="Alamat lengkap"></textarea>
    </fieldset>

    @{
        ViewData["MapId"] = "map-picker";
        ViewData["LatInputId"] = "latitude-input";
        ViewData["LngInputId"] = "longitude-input";
        ViewData["SearchInputId"] = "search-location";
        ViewData["SearchResultsId"] = "search-results";
        ViewData["ClearSearchBtnId"] = "clear-search";
        ViewData["Label"] = "Pilih Lokasi di Peta";
    }
    @await Html.PartialAsync("_LeafletMapPicker")

    <button type="submit" class="btn btn-primary">Simpan</button>
</form>

@section Scripts {
    <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
    <script src="~/js/leaflet-map-picker.js"></script>
    <script>
        window.leafletMapPickerInstance = new LeafletMapPicker({
            mapElementId: 'map-picker',
            latInputId: 'latitude-input',
            lngInputId: 'longitude-input',
            searchInputId: 'search-location',
            searchResultsId: 'search-results',
            clearSearchBtnId: 'clear-search',
            alamatInputSelector: 'textarea[name="alamat_lengkap"]',
            initialLat: -6.2088,
            initialLng: 106.8456,
            initialZoom: 12
        });
    </script>
}

Custom Styling

Anda bisa override CSS classes untuk custom styling:

/* Custom map height */
.leaflet-map-picker {
    height: 500px;
}

/* Custom search box styling */
.leaflet-map-picker-search-input {
    border-color: #your-color;
}

/* Custom search results */
.leaflet-map-picker-result-item:hover {
    background-color: #your-color;
}

Browser Support

Chrome (latest)
Firefox (latest)
Safari (latest)
Edge (latest)

Dependencies

Leaflet 1.9.4+
OpenStreetMap (Tile Layer)
Nominatim API (Geocoding)

Troubleshooting

Map tidak muncul

Pastikan Leaflet CSS dan JS sudah ter-load
Periksa console untuk error
Pastikan element ID sudah benar

Search tidak bekerja

Pastikan ada koneksi internet
Nominatim API memiliki rate limit
Periksa browser console untuk error

Koordinat tidak update

Pastikan input ID sudah benar
Periksa attribute step="any" pada input number

License

MIT License

Author

Bank Sampah Development Team

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