I am upgrading my app from OpenLayers 4.6.4 to 6.1.1 and I can't figure out how
to extend Tile in OL6. My code is as follows which works in OL 4.6.4. What
would I do to achieve the same thing in OpenLayers 6?
My error is: Uncaught TypeError: Class extends value undefined is not a
constructor or null
index.html that includes OL6.1.1 is:
<link rel="stylesheet" href="ol.css">
<script src="ol.js"></script>
<div tabindex="700" id="map" class="map"></div>
<script type="module">
import MapView from './mapview.js';
var mv = new MapView();
</script>
My map view class contains the following (which works in OpenLayers 4):
class CanvasTile extends ol.Tile {
constructor(tileCoord, state, src, crossOrigin, tileLoadFunction, options) {
super(tileCoord, state, options);
this.canvas = document.createElement('canvas');
this.tileLoadFunction = tileLoadFunction;
this.src = src;
}
getCanvas() {
return this.canvas;
}
}
Ashley Mort
Sr. Software Engineer
972-638-6317 office
814-571-3039 cell
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