Add label option to ZoomToExtent

externs/olx.js

@@ -1409,6 +1409,7 @@ olx.control.ZoomSliderOptions.prototype.render;
 /**
  * @typedef {{className: (string|undefined),
  *     target: (Element|undefined),
+ *     label: (string|undefined),
  *     tipLabel: (string|undefined),
  *     extent: (ol.Extent|undefined)}}
  * @api stable
@@ -1432,6 +1433,14 @@ olx.control.ZoomToExtentOptions.prototype.className;
 olx.control.ZoomToExtentOptions.prototype.target;
 
 
+/**
+ * Text label to use for the button. Default is `E`
+ * @type {string|undefined}
+ * @api stable
+ */
+olx.control.ZoomToExtentOptions.prototype.label;
+
+
 /**
  * Text label to use for the button tip. Default is `Zoom to extent`
  * @type {string|undefined}