title: Mapbox GL-JS : Adding new tileset overlay under labels
body: <p>I have a tileset that I am loading into my map (map is called <em>topleftmap</em>). I want the city and other labels to load over the tiles, not under - sort of like in this example from Mapbox : <a href="https://docs.mapbox.com/mapbox-gl-js/example/geojson-layer-in-stack/" rel="nofollow noreferrer">https://docs.mapbox.com/mapbox-gl-js/example/geojson-layer-in-stack/</a></p>
  
  <p>How do I do this with tilesets? I have an external JS file I use to load in the tilesets like this : </p>
  
  <pre><code>topleftmapbox.addLayer({
      "id": "currentProduct",
      "type": "raster",
      "source": {
          "type": "raster",
          "tiles": ["tiles/" + productSelection + "/" + productLocation + "/{z}/{x}/{y}.png"],
          "minzoom": 8,
          "maxzoom": 10,
          "scheme": "tms",
          "tileSize": 256,
  
      }});
  </code></pre>
  
  <p>So of course that works fine, but the labels are UNDER the tiles. I have tried this below, (using the example from Mapbox) but it doesn't seem to work : </p>
  
  <pre><code>var layers = topleftmapbox.getStyle().layers;
      // Find the index of the first symbol layer in the map style
      var firstSymbolId;
      for (var i = 0; i &lt; layers.length; i++) {
          if (layers[i].type === 'symbol') {
              firstSymbolId = layers[i].id;
              break;
          }
      }
  
  topleftmapbox.addLayer({
      "id": "currentProduct",
      "type": "raster",
      "source": {
          "type": "raster",
          "tiles": ["tiles/" + productSelection + "/" + productLocation + "/{z}/{x}/{y}.png"],
          "minzoom": 8,
          "maxzoom": 10,
          "scheme": "tms",
          "tileSize": 256,
  
      },firstSymbolId});
  </code></pre>
  
  <p>Lastly, here is an image showing what it looks like. My tiles are slightly transparent, but the labels should be bright white, like the ones away from the data. Any thoughts?</p>
  
  <p><a href="https://i.stack.imgur.com/iZukD.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iZukD.jpg" alt="enter image description here"></a></p>