This example uses OpenLayers v10.9.0. The latest is v.
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#### OSM Vector Tiles

vector 86 tiles 8 osm 6 mapzen 2

#####

Using OpenStreetMap vector tiles.

A simple vector tiles map with Mapzen vector tiles. This example uses the TopoJSON format's `layerName` option to determine the layer ("water", "roads", "buildings") for styling. Note: [`ol/format/MVT`] is an even more efficient format for vector tiles.

##### main.js

    import Map from 'ol/Map.js';
    import View from 'ol/View.js';
    import TopoJSON from 'ol/format/TopoJSON.js';
    import VectorTileLayer from 'ol/layer/VectorTile.js';
    import {fromLonLat} from 'ol/proj.js';
    import VectorTileSource from 'ol/source/VectorTile.js';

    const key = 'Your Nextzen API key from https://developers.nextzen.org/';

    const rules = [
      {
        filter: ['==', ['get', 'layer'], 'water'],
        style: {
          'fill-color': '#9db9e8',
        },
      },
      {
        else: true,
        filter: ['all', ['==', ['get', 'layer'], 'roads'], ['get', 'railway']],
        style: {
          'stroke-color': '#7de',
          'stroke-width': 1,
          'z-index': ['number', ['get', 'sort_key'], 0],
        },
      },
      {
        else: true,
        filter: ['==', ['get', 'layer'], 'roads'],
        style: {
          'stroke-color': [
            'match',
            ['get', 'kind'],
            'major_road',
            '#776',
            'minor_road',
            '#ccb',
            'highway',
            '#f39',
            'none',
          ],
          'stroke-width': ['match', ['get', 'kind'], 'highway', 1.5, 1],
          'z-index': ['number', ['get', 'sort_key'], 0],
        },
      },
      {
        else: true,
        filter: [
          'all',
          ['==', ['get', 'layer'], 'buildings'],
          ['<', ['resolution'], 10],
        ],
        style: {
          'fill-color': '#6666',
          'stroke-color': '#4446',
          'stroke-width': 1,
          'z-index': ['number', ['get', 'sort_key'], 0],
        },
      },
    ];

    const map = new Map({
      layers: [
        new VectorTileLayer({
          source: new VectorTileSource({
            attributions:
              '&copy; OpenStreetMap contributors, Who’s On First, ' +
              'Natural Earth, and osmdata.openstreetmap.de',
            format: new TopoJSON({
              layerName: 'layer',
              layers: ['water', 'roads', 'buildings'],
            }),
            maxZoom: 16,
            url:
              'https://tile.nextzen.org/tilezen/vector/v1/all/{z}/{x}/{y}.topojson?api_key=' +
              key,
          }),
          style: rules,
        }),
      ],
      target: 'map',
      view: new View({
        center: fromLonLat([-74.0064, 40.7142]),
        maxZoom: 19,
        zoom: 15,
      }),
    });

##### index.html

    <!DOCTYPE html>
    <html lang="en">
      <head>
        <meta charset="UTF-8">
        <title>OSM Vector Tiles</title>
        <link rel="stylesheet" href="node_modules/ol/ol.css">
        <style>
          .map {
            width: 100%;
            height: 400px;
          }
          .map {
            background: #f8f4f0;
          }
        </style>
      </head>
      <body>
        <div id="map" class="map"></div>

        <script type="module" src="main.js"></script>
      </body>
    </html>

##### package.json

    {
      "name": "osm-vector-tiles",
      "dependencies": {
        "ol": "10.9.0"
      },
      "devDependencies": {
        "vite": "^3.2.3"
      },
      "scripts": {
        "start": "vite",
        "build": "vite build"
      }
    }