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node_modules/node-http-xhr/lib/node-xhr-event-target.js

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+'use strict';
+
+/**
+ * Node.js `XMLHttpRequestEventTarget` implementation.
+ *
+ * @module node-xhr-event-target
+ * @author Stan Zhang <stan.zhang2@gmail.com>
+ */
+
+var EventTarget = require('./node-event-target');
+
+var events = [
+  /**
+   * The {@link
+   * module:node-http-xhr#readyState
+   * `readyState`
+   * } changed.
+   *
+   * @event module:node-xhr-event-target#readystatechange
+   */
+  'readystatechange',
+  /**
+   * The request was aborted.
+   *
+   * @event module:node-xhr-event-target#abort
+   */
+  'abort',
+  /**
+   * An error was encountered.
+   *
+   * @event module:node-xhr-event-target#error
+   * @type {Error}
+  */
+  'error',
+  /**
+   * The request timed out.
+   *
+   * @event module:node-xhr-event-target#timeout
+   */
+  'timeout',
+  /**
+   * The response finished loading.
+   *
+   * @event module:node-xhr-event-target#load
+   */
+  'load'
+];
+
+/**
+ * Creates a new `XMLHttpRequestEventTarget`.
+ *
+ * @classdesc The interface that describes the event handlers for an
+ * `XMLHttpRequest`.
+ *
+ * NOTE: Currently, some features are lacking:
+ * - Some ProgressAPI events (`loadstart`, `loadend`, `progress`)
+ *
+ * See {@link
+ * https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequestEventTarget
+ * `XMLHttpRequestEventTarget` on MDN
+ * } for more details.
+ *
+ * @class
+ * @extends module:node-event-target
+ */
+module.exports = function () {
+  EventTarget.call(this);
+
+  var props = {};
+
+  // Add private event handler properties
+  events.forEach(function (type) {
+    props['_on' + type] = { value: null, writable: true };
+  });
+
+  Object.defineProperties(this, props);
+};
+
+/** @alias module:node-xhr-event-target */
+var NodeXHREventTarget = module.exports;
+
+var protoProps = {};
+
+//
+// Set up event handler properties
+//
+events.forEach(function (type) {
+  var key = 'on' + type;
+  protoProps[key] = {
+    get: function getHandler() { return this['_' + key]; },
+    set: function setHandler(handler) {
+      if (typeof handler === 'function') {
+        this.addEventListener(type, handler);
+        this['_' + key] = handler;
+      } else {
+        var old = this['_' + key];
+        if (old) {
+          this.removeEventListener(type, old);
+        }
+
+        this['_' + key] = null;
+      }
+    }
+  };
+});
+
+NodeXHREventTarget.prototype = Object.create(
+  EventTarget.prototype, protoProps
+);
+