JavaScript Maps SDK

Change a layer's color with buttons

Use setPaintProperty to change a layer’s fill color. 


<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>Change a layer's color with buttons</title>
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link rel="stylesheet" href="https://maps-sdk.trimblemaps.com/v4/trimblemaps-4.2.3.css" />
    <script src="https://maps-sdk.trimblemaps.com/v4/trimblemaps-4.2.3.js"></script>
    <style>
      body {
        margin: 0;
        padding: 0;
      }
      html,
      body,
      #map {
        height: 100%;
      }
            .map-overlay {
        font: 12px/20px 'Helvetica Neue', Arial, Helvetica, sans-serif;
        position: absolute;
        width: 200px;
        top: 0;
        left: 0;
        padding: 10px;
      }

      .map-overlay .map-overlay-inner {
        background-color: #fff;
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
        border-radius: 3px;
        padding: 10px;
        margin-bottom: 10px;
      }

      .map-overlay-inner fieldset {
        border: none;
        padding: 0;
        margin: 0 0 10px;
      }

      .map-overlay-inner fieldset:last-child {
        margin: 0;
      }

      .map-overlay-inner select {
        width: 100%;
      }

      .map-overlay-inner label {
        display: block;
        font-weight: bold;
        margin: 0 0 5px;
      }

      .map-overlay-inner button {
        display: inline-block;
        width: 36px;
        height: 20px;
        border: none;
        cursor: pointer;
      }

      .map-overlay-inner button:focus {
        outline: none;
      }

      .map-overlay-inner button:hover {
        box-shadow: inset 0 0 0 3px rgba(0, 0, 0, 0.1);
      }
    </style>
  </head>
  <body>
    <div id="map"></div>


<div class="map-overlay top">
  <div class="map-overlay-inner">
    <fieldset>
      <label for="layer">Select layer</label>
      <select id="layer" name="layer">
        <option value="water">Water</option>
        <option value="building_3d">Buildings</option>
      </select>
    </fieldset>
    <fieldset>
      <label>Choose a color</label>
      <div id="swatches"></div>
    </fieldset>
  </div>
</div>

    <script>
      TrimbleMaps.setAPIKey('YOUR_API_KEY_HERE');
      const map = new TrimbleMaps.Map({
        container: 'map',
        style: TrimbleMaps.Common.Style.TRANSPORTATION,
        center: [12.338, 45.4385],
        zoom: 17.4,
      });

      const swatches = document.getElementById('swatches');
      const layer = document.getElementById('layer');
      const colors = [
        '#ffffcc',
        '#a1dab4',
        '#41b6c4',
        '#2c7fb8',
        '#253494',
        '#fed976',
        '#feb24c',
        '#fd8d3c',
        '#f03b20',
        '#bd0026',
      ];
      colors.forEach((color) => {
        const swatch = document.createElement('button');
        swatch.style.backgroundColor = color;
        swatch.addEventListener('click', () => {
          map.setPaintProperty(
            layer.value,
            layer.value === 'water' ? 'fill-color' : 'fill-extrusion-color',
            color
          );
          map.setLayoutProperty(
                        'building_3d',
                        'visibility',
                        'visible'
                    );
        });
        swatches.appendChild(swatch);
      });
    </script>
  </body>
</html>
Last updated June 26, 2025.