Merge pull request #1657 from elemoine/renderer

Do not expose both renderer and renderers options

src/objectliterals.jsdoc

@@ -42,8 +42,7 @@
  * @property {boolean|undefined} ol3Logo Show ol3 logo. Default is `true`.
  * @property {ol.Collection|Array.<ol.Overlay>|undefined} overlays
  *     Overlays initially added to the map.
- * @property {ol.RendererHint|undefined} renderer Renderer.
- * @property {Array.<ol.RendererHint>|undefined} renderers Renderers.
+ * @property {ol.RendererHint|Array.<ol.RendererHint>|undefined} renderer Renderer.
  * @property {Element|string|undefined} target The container for the map.
  * @property {ol.IView|undefined} view The map's view. Currently
  *     {@link ol.View2D} is available as view.

src/ol/map.js

@@ -1370,10 +1370,14 @@ ol.Map.createOptionsInternal = function(options) {
    * @type {Array.<ol.RendererHint>}
    */
   var rendererHints;
-  if (goog.isDef(options.renderers)) {
-    rendererHints = options.renderers;
-  } else if (goog.isDef(options.renderer)) {
-    rendererHints = [options.renderer];
+  if (goog.isDef(options.renderer)) {
+    if (goog.isArray(options.renderer)) {
+      rendererHints = options.renderer;
+    } else if (goog.isString(options.renderer)) {
+      rendererHints = [options.renderer];
+    } else {
+      goog.asserts.fail('Incorrect format for renderer option');
+    }
   } else {
     rendererHints = ol.DEFAULT_RENDERER_HINTS;
   }