in Style's addLayer and moveLayer the before param is optional

mapbox · Jan 2, 2018 · ca01a1e · ca01a1e
1 parent aa49824
commit ca01a1e
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/style/style.js b/src/style/style.js
@@ -510,7 +510,7 @@ class Style extends Evented {
     /**
      * Add a layer to the map style. The layer will be inserted before the layer with
      * ID `before`, or appended if `before` is omitted.
-     * @param {string} before  ID of an existing layer to insert before
+     * @param {string} [before] ID of an existing layer to insert before
      */
     addLayer(layerObject: LayerSpecification, before?: string, options?: {validate?: boolean}) {
         this._checkLoaded();
@@ -568,7 +568,7 @@ class Style extends Evented {
      * Moves a layer to a different z-position. The layer will be inserted before the layer with
      * ID `before`, or appended if `before` is omitted.
      * @param {string} id  ID of the layer to move
-     * @param {string} before  ID of an existing layer to insert before
+     * @param {string} [before] ID of an existing layer to insert before
      */
     moveLayer(id: string, before?: string) {
         this._checkLoaded();