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check that context.map exists (#974)

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Xiaoji Chen 2020-01-02 11:22:10 -08:00 committed by GitHub
parent 28f0b6e01a
commit ed7d8df842
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4
src/components/navigation-control.js
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@ -143,7 +143,9 @@ export default class NavigationControl extends BaseControl<
const {className, showCompass, showZoom, zoomInLabel, zoomOutLabel, compassLabel} = this.props;
if (!this._uiVersion) {
this._uiVersion = getUIVersion(this._context.map.version);
// map may not exist if context is provided by user application (e.g. DeckGL)
const {map} = this._context;
this._uiVersion = getUIVersion(map && map.version);
}
return (