<!DOCTYPE html> <html> <head> <title>Accessible Map</title> <link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css"> <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x --> <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script> <script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script> <style> a.skiplink { position: absolute; clip: rect(1px, 1px, 1px, 1px); padding: 0; border: 0; height: 1px; width: 1px; overflow: hidden; } a.skiplink:focus { clip: auto; height: auto; width: auto; background-color: #fff; padding: 0.3em; } #map:focus { outline: #4A74A8 solid 0.15em; } </style> </head> <body> <a class="skiplink" href="#map">Go to map</a> <div id="map" class="map" tabindex="0"></div> <button id="zoom-out">Zoom out</button> <button id="zoom-in">Zoom in</button> <script> var map = new ol.Map({ layers: [ new ol.layer.Tile({ source: new ol.source.OSM() }) ], target: 'map', controls: ol.control.defaults({ attributionOptions: /** @type {olx.control.AttributionOptions} */ ({ collapsible: false }) }), view: new ol.View({ center: [0, 0], zoom: 2 }) }); document.getElementById('zoom-out').onclick = function() { var view = map.getView(); var zoom = view.getZoom(); view.setZoom(zoom - 1); }; document.getElementById('zoom-in').onclick = function() { var view = map.getView(); var zoom = view.getZoom(); view.setZoom(zoom + 1); }; </script> </body> </html>
OpenLayers示例代码:访问地图
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