Assert each layer is only added to the map once

2020-01-24 16:05:58 +01:00
parent 97cb0bbd77
commit 1ee03decdd
3 changed files with 14 additions and 3 deletions
--- a/doc/errors/index.md
+++ b/doc/errors/index.md
@@ -245,3 +245,7 @@ Layer opacity must be a number.

 `forEachFeatureAtCoordinate` cannot be used on a WebGL layer if the hit detection logic has not been enabled.
 This is done by providing adequate shaders using the `hitVertexShader` and `hitFragmentShader` properties of `WebGLPointsLayerRenderer`.
+
+### 67
+
+A layer can only be added to the map once. Use either `layer.setMap()` or `map.addLayer()`, not both.