Gecko [ gandhischool.edu.np ]

Name	Size	Permission
add-listeners.js	3.7 KB	-rw-rw-rw-
check-listener-leaks.js	3.38 KB	-rw-rw-rw-
common.js	3.13 KB	-rw-rw-rw-
errors.js	344 B	-rw-rw-rw-
events-list.js	813 B	-rw-rw-rw-
events-once.js	5.97 KB	-rw-rw-rw-
index.js	1.8 KB	-rw-rw-rw-
legacy-compat.js	296 B	-rw-rw-rw-
listener-count.js	1.65 KB	-rw-rw-rw-
listeners-side-effects.js	2.05 KB	-rw-rw-rw-
listeners.js	5.21 KB	-rw-rw-rw-
max-listeners.js	2.02 KB	-rw-rw-rw-
method-names.js	1.63 KB	-rw-rw-rw-
modify-in-emit.js	3.15 KB	-rw-rw-rw-
num-args.js	2.17 KB	-rw-rw-rw-
once.js	2.59 KB	-rw-rw-rw-
prepend.js	833 B	-rw-rw-rw-
remove-all-listeners.js	4.62 KB	-rw-rw-rw-
remove-listeners.js	6.44 KB	-rw-rw-rw-
set-max-listeners-side-effects...	1.41 KB	-rw-rw-rw-
special-event-names.js	1.39 KB	-rw-rw-rw-
subclass.js	1.96 KB	-rw-rw-rw-
symbols.js	627 B	-rw-rw-rw-

Code Editor : add-listeners.js

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

var common = require('./common');
var assert = require('assert');
var EventEmitter = require('../');

{
  var ee = new EventEmitter();
  var events_new_listener_emitted = [];
  var listeners_new_listener_emitted = [];

// Sanity check
  assert.strictEqual(ee.addListener, ee.on);

ee.on('newListener', function(event, listener) {
    // Don't track newListener listeners.
    if (event === 'newListener')
      return;

events_new_listener_emitted.push(event);
    listeners_new_listener_emitted.push(listener);
  });

var hello = common.mustCall(function(a, b) {
    assert.strictEqual('a', a);
    assert.strictEqual('b', b);
  });

ee.once('newListener', function(name, listener) {
    assert.strictEqual(name, 'hello');
    assert.strictEqual(listener, hello);

var listeners = this.listeners('hello');
    assert.ok(Array.isArray(listeners));
    assert.strictEqual(listeners.length, 0);
  });

ee.on('hello', hello);
  ee.once('foo', assert.fail);

assert.ok(Array.isArray(events_new_listener_emitted));
  assert.strictEqual(events_new_listener_emitted.length, 2);
  assert.strictEqual(events_new_listener_emitted[0], 'hello');
  assert.strictEqual(events_new_listener_emitted[1], 'foo');

assert.ok(Array.isArray(listeners_new_listener_emitted));
  assert.strictEqual(listeners_new_listener_emitted.length, 2);
  assert.strictEqual(listeners_new_listener_emitted[0], hello);
  assert.strictEqual(listeners_new_listener_emitted[1], assert.fail);

ee.emit('hello', 'a', 'b');
}

// just make sure that this doesn't throw:
{
  var f = new EventEmitter();

f.setMaxListeners(0);
}

{
  var listen1 = function() {};
  var listen2 = function() {};
  var ee = new EventEmitter();

ee.once('newListener', function() {
    var listeners = ee.listeners('hello');
    assert.ok(Array.isArray(listeners));
    assert.strictEqual(listeners.length, 0);
    ee.once('newListener', function() {
      var listeners = ee.listeners('hello');
      assert.ok(Array.isArray(listeners));
      assert.strictEqual(listeners.length, 0);
    });
    ee.on('hello', listen2);
  });
  ee.on('hello', listen1);
  // The order of listeners on an event is not always the order in which the
  // listeners were added.
  var listeners = ee.listeners('hello');
  assert.ok(Array.isArray(listeners));
  assert.strictEqual(listeners.length, 2);
  assert.strictEqual(listeners[0], listen2);
  assert.strictEqual(listeners[1], listen1);
}

// Verify that the listener must be a function
assert.throws(function() {
  var ee = new EventEmitter();

ee.on('foo', null);
}, /^TypeError: The "listener" argument must be of type Function. Received type object$/);

${this.title}

Code Editor : add-listeners.js