From 08e0a0dfea75b5dcf1efbedefdbd5b95169fc526 Mon Sep 17 00:00:00 2001
From: ahocevar <andreas.hocevar@gmail.com>
Date: Tue, 5 Jun 2018 16:38:15 +0200
Subject: [PATCH] Fix vector tile docs and types

---
 src/ol/VectorTile.js        | 2 +-
 src/ol/source/VectorTile.js | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/ol/VectorTile.js b/src/ol/VectorTile.js
index 119ddf49ac..f44d381803 100644
--- a/src/ol/VectorTile.js
+++ b/src/ol/VectorTile.js
@@ -59,7 +59,7 @@ const VectorTile = function(tileCoord, state, src, format, tileLoadFunction, opt
    * @private
    * @type {module:ol/proj/Projection}
    */
-  this.projection_;
+  this.projection_ = null;
 
   /**
    * @private
diff --git a/src/ol/source/VectorTile.js b/src/ol/source/VectorTile.js
index 20d83a4a88..6ee376c2cf 100644
--- a/src/ol/source/VectorTile.js
+++ b/src/ol/source/VectorTile.js
@@ -31,11 +31,13 @@ import {createXYZ, extentFromProjection, createForProjection} from '../tilegrid.
  *   tile.setLoader(function() {
  *     var data = // ... fetch data
  *     var format = tile.getFormat();
+ *     tile.setProjection(format.readProjection(data));
  *     tile.setFeatures(format.readFeatures(data, {
- *       // uncomment the line below for ol/format/MVT only
- *       extent: tile.getExtent(),
+ *       // featureProjection is not required for ol/format/MVT
  *       featureProjection: map.getView().getProjection()
  *     }));
+ *     // the line below is only required for ol/format/MVT
+ *     tile.setExtent(format.getLastExtent());
  *   };
  * });
  * @property {module:ol/Tile~UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.