The Tor Browser / file revision

 /* This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 "use strict";

 module.metadata = {

   "stability": "unstable"

 };

 let { emit } = require("./core");

 // Simple utility function takes event target, event type and optional

 // `options.capture` and returns node style event stream that emits "data"

 // events every time event of that type occurs on the given `target`.

 function open(target, type, options) {

   let output = {};

   let capture = options && options.capture ? true : false;

   target.addEventListener(type, function(event) {

     emit(output, "data", event);

   }, capture);

   return output;

 }

 exports.open = open;