Ensure loseContext exists before calling it (#4245)

* Fix - call loseContext only if exists

* optional chaining

* Update changelog - PR 4245 bug fix

* Update CHANGELOG.md

Co-authored-by: Harel M <harel.mazor@gmail.com>

---------

Co-authored-by: Birk Skyum <74932975+birkskyum@users.noreply.github.com>
Co-authored-by: Harel M <harel.mazor@gmail.com>

CHANGELOG.md

@@ -17,6 +17,7 @@
 
 - ⚠️ Allow breaking lines in labels before a left parenthesis ([#4138](https://github.com/maplibre/maplibre-gl-js/pull/4138))
 - ⚠️ Fix ignoring embedded line breaks when `symbol-placement` is `line` or `line-center` ([#4124](https://github.com/maplibre/maplibre-gl-js/pull/4124))
+- Ensure loseContext exists before calling it ([#4245](https://github.com/maplibre/maplibre-gl-js/pull/4245))
 - _...Add new stuff here..._
 
 ## 4.3.2

src/ui/map.ts

@@ -3154,7 +3154,7 @@ export class Map extends Camera {
 
         this._resizeObserver?.disconnect();
         const extension = this.painter.context.gl.getExtension('WEBGL_lose_context');
-        if (extension) extension.loseContext();
+        if (extension?.loseContext) extension.loseContext();
         this._canvas.removeEventListener('webglcontextrestored', this._contextRestored, false);
         this._canvas.removeEventListener('webglcontextlost', this._contextLost, false);
         DOM.remove(this._canvasContainer);