Add a New Layer Below Labels

Insert a new data layer below the map’s label layers so labels stay visible.

const API_KEY = 'toursprung';

    const map = new maptoolkit.Map({
        container: 'map',
        style: `https://static.maptoolkit.net/styles/toursprung/terrain.json?api_key=${API_KEY}`,
        center: [-88.13734351262877, 35.137451890638886],
        zoom: 4,
        attributionControl: { compact: false }
    });

    map.addControl(new maptoolkit.NavigationControl(), 'top-right');

    map.on('load', () => {
        const layers = map.getStyle().layers;
        let firstSymbolId;
        for (const layer of layers) {
            if (layer.type === 'symbol') {
                firstSymbolId = layer.id;
                break;
            }
        }

        map.addSource('urban-areas', {
            type: 'geojson',
            data: 'https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_50m_urban_areas.geojson'
        });

        map.addLayer({
            id: 'urban-areas-fill',
            type: 'fill',
            source: 'urban-areas',
            paint: {
                'fill-color': '#f08',
                'fill-opacity': 0.4
            }
        }, firstSymbolId);
    });

<!DOCTYPE html>
<html lang="en">
<head>
    <title>Add a New Layer Below Labels – Maptoolkit Maps JS</title>
    <meta property="og:description" content="Insert a new data layer below the map's label layers so labels stay visible." />
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://unpkg.com/@maptoolkit/maps@11.0.0-beta.2/dist/maptoolkit.js"></script>
    <link rel="stylesheet" href="https://unpkg.com/@maptoolkit/maps@11.0.0-beta.2/dist/maptoolkit.css" />
    <style>
        html, body { width: 100%; height: 100%; margin: 0; padding: 0; }
        #map { width: 100%; height: 100%; }
    </style>
</head>
<body>
<div id="map"></div>
<script>
    const API_KEY = 'toursprung';

    const map = new maptoolkit.Map({
        container: 'map',
        style: `https://static.maptoolkit.net/styles/toursprung/terrain.json?api_key=${API_KEY}`,
        center: [-88.13734351262877, 35.137451890638886],
        zoom: 4,
        attributionControl: { compact: false }
    });

    map.addControl(new maptoolkit.NavigationControl(), 'top-right');

    map.on('load', () => {
        const layers = map.getStyle().layers;
        let firstSymbolId;
        for (const layer of layers) {
            if (layer.type === 'symbol') {
                firstSymbolId = layer.id;
                break;
            }
        }

        map.addSource('urban-areas', {
            type: 'geojson',
            data: 'https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_50m_urban_areas.geojson'
        });

        map.addLayer({
            id: 'urban-areas-fill',
            type: 'fill',
            source: 'urban-areas',
            paint: {
                'fill-color': '#f08',
                'fill-opacity': 0.4
            }
        }, firstSymbolId);
    });
</script>
</body>
</html>

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