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Clarify ref migration in upgrade guide (#1356)

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Xiaoji Chen 2021-02-16 10:51:07 -08:00 committed by Xiaoji Chen
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docs/upgrade-guide.md
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@ -16,6 +16,10 @@ const CONTROLLER_OPTS = {
<MapGL {...CONTROLLER_OPTS} ... /> <MapGL {...CONTROLLER_OPTS} ... />
``` ```
- `Source` and `Layer` components no longer expose imperative methods via `ref` as part of the migration to functional components. This is to comply with the pattern recommended by the latest React.
+ If you used to call `sourceRef.getSource()`, it can be replaced with `mapRef().getMap().getSource(sourceId)`.
+ If you used to call `layerRef.getLayer()`, it can be replaced with `mapRef().getMap().getLayer(layerId)`.
## Upgrading to v6 ## Upgrading to v6
- A valid Mapbox access token is always required. - A valid Mapbox access token is always required.