Use extends and super for format/KML

src/ol/format/KML.js

@@ -1,7 +1,6 @@
 /**
  * @module ol/format/KML
  */
-import {inherits} from '../util.js';
 import Feature from '../Feature.js';
 import {extend, includes} from '../array.js';
 import {assert} from '../asserts.js';
@@ -388,23 +387,28 @@ function createStyleDefaults() {
  * @classdesc
  * Feature format for reading and writing data in the KML format.
  *
+ * {@link module:ol/format/KML~KML#readFeature} will read the first feature from
+ * a KML source.
+ *
+ * MultiGeometries are converted into GeometryCollections if they are a mix of
+ * geometry types, and into MultiPoint/MultiLineString/MultiPolygon if they are
+ * all of the same type.
+ *
  * Note that the KML format uses the URL() constructor. Older browsers such as IE
  * which do not support this will need a URL polyfill to be loaded before use.
  *
- * @extends {module:ol/format/XMLFeature}
  * @api
  */
-class KML {
+class KML extends XMLFeature {
 
   /**
    * @param {module:ol/format/KML~Options=} opt_options Options.
    */
   constructor(opt_options) {
+    super();
 
     const options = opt_options ? opt_options : {};
 
-    XMLFeature.call(this);
-
     if (!DEFAULT_STYLE_ARRAY) {
       createStyleDefaults();
     }
@@ -849,8 +853,6 @@ class KML {
   }
 }
 
-inherits(KML, XMLFeature);
-
 
 /**
  * @param {module:ol/style/Style|undefined} foundStyle Style.
@@ -2066,45 +2068,6 @@ function whenParser(node, objectStack) {
 }
 
 
-/**
- * Read the first feature from a KML source. MultiGeometries are converted into
- * GeometryCollections if they are a mix of geometry types, and into MultiPoint/
- * MultiLineString/MultiPolygon if they are all of the same type.
- *
- * @function
- * @param {Document|Node|Object|string} source Source.
- * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.
- * @return {module:ol/Feature} Feature.
- * @api
- */
-KML.prototype.readFeature;
-
-
-/**
- * Read all features from a KML source. MultiGeometries are converted into
- * GeometryCollections if they are a mix of geometry types, and into MultiPoint/
- * MultiLineString/MultiPolygon if they are all of the same type.
- *
- * @function
- * @param {Document|Node|Object|string} source Source.
- * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.
- * @return {Array.<module:ol/Feature>} Features.
- * @api
- */
-KML.prototype.readFeatures;
-
-
-/**
- * Read the projection from a KML source.
- *
- * @function
- * @param {Document|Node|Object|string} source Source.
- * @return {module:ol/proj/Projection} Projection.
- * @api
- */
-KML.prototype.readProjection;
-
-
 /**
  * @param {Node} node Node to append a TextNode with the color to.
  * @param {module:ol/color~Color|string} color Color.
@@ -2964,17 +2927,4 @@ function writeVec2(node, vec2) {
 }
 
 
-/**
- * Encode an array of features in the KML format. GeometryCollections, MultiPoints,
- * MultiLineStrings, and MultiPolygons are output as MultiGeometries.
- *
- * @function
- * @param {Array.<module:ol/Feature>} features Features.
- * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.
- * @return {string} Result.
- * @api
- */
-KML.prototype.writeFeatures;
-
-
 export default KML;