feat(olcs): Support skipping vector synchronization and update script target to match contributing doc.

CONTRIBUTING.md

@@ -23,10 +23,10 @@ browse http://localhost:1234
 The examples use a compiled version of OLCesium. If you want to use the source code directly you can define an alias.
 See https://en.parceljs.org/module_resolution.html#aliases
 
-### The `check` target
+### The `checks` target
 
 ```bash
-npm run check
+npm run checks
 ```
 
 Run this before every commit. It will catch many problems quickly.

src/olcs/FeatureConverter.ts

@@ -1165,6 +1165,10 @@ export default class FeatureConverter {
       if (!feature) {
         continue;
       }
+      const skip = feature.get('olcs_skip');
+      if (skip) {
+        continue;
+      }
       const layerStyle: StyleFunction | undefined = olLayer.getStyleFunction();
       const styles = this.computePlainStyle(olLayer, feature, layerStyle,
           resolution);
@@ -1203,6 +1207,11 @@ export default class FeatureConverter {
    * @api
    */
   convert(layer: VectorLayer<BackwardCompatibleFeature>, view: View, feature: Feature, context: OlFeatureToCesiumContext): PrimitiveCollection {
+    const skip = feature.get('olcs_skip');
+    if (skip) {
+      return null;
+    }
+
     const proj = view.getProjection();
     const resolution = view.getResolution();
 

src/olcs/VectorSynchronizer.ts

@@ -96,6 +96,11 @@ export default class VectorSynchronizer extends olcsAbstractSynchronizer<VectorL
     }
 
     console.assert(source instanceof olSourceVector);
+
+    const skip = source.get('olcs_skip');
+    if (skip) {
+      return null;
+    }
     console.assert(this.view);
 
     const view = this.view;
@@ -121,6 +126,10 @@ export default class VectorSynchronizer extends olcsAbstractSynchronizer<VectorL
     };
 
     const onRemoveFeature = (feature: Feature) => {
+      const skip = feature.get('olcs_skip');
+      if (skip) {
+        return;
+      }
       const id = getUid(feature);
       const context: OlFeatureToCesiumContext = counterpart.context;
       const bbs = context.featureToCesiumMap[id];
@@ -152,6 +161,10 @@ export default class VectorSynchronizer extends olcsAbstractSynchronizer<VectorL
     olListenKeys.push(source.on('changefeature', (e: VectorSourceEvent) => {
       const feature = e.feature;
       console.assert(feature);
+      const skip = feature.get('olcs_skip');
+      if (skip) {
+        return;
+      }
       onRemoveFeature(feature);
       onAddFeature(feature);
     }));