kylefang/react-native
1
0
Fork 0
mirror of https://github.com/zhigang1992/react-native.git synced 2026-04-11 22:40:37 +08:00
Code Issues Packages Projects Releases Wiki Activity

Clean up EventEmitter

Browse Source 
Summary: As suggested by yungsters in D13138187

Reviewed By: mjesun

Differential Revision: D13192765

fbshipit-source-id: 8ab3dc74b3a9aaebf043bc3b5ed4f2590f480d10
This commit is contained in:
Christoph Nakazawa
2018-11-26 06:24:06 -08:00
committed by Facebook Github Bot
parent cfef04e760
commit 1f8b46a2fc
1 changed files with 4 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
Libraries/vendor/emitter/EventEmitter.js vendored
View File

@@ -16,8 +16,6 @@ const EventSubscriptionVendor = require('EventSubscriptionVendor');
const invariant = require('fbjs/lib/invariant');
const emptyFunctionThatReturnsTrue = () => true;
/**
* @class EventEmitter
* @description
@@ -151,13 +149,9 @@ class EventEmitter {
* @returns {array}
*/
listeners(eventType: string): [EmitterSubscription] {
const subscriptions: ?[
EmitterSubscription,
] = (this._subscriber.getSubscriptionsForType(eventType): any);
const subscriptions = this._subscriber.getSubscriptionsForType(eventType);
return subscriptions
? subscriptions
.filter(emptyFunctionThatReturnsTrue)
.map(subscription => subscription.listener)
? subscriptions.map(subscription => subscription.listener)
: [];
}
@@ -176,9 +170,7 @@ class EventEmitter {
* emitter.emit('someEvent', 'abc'); // logs 'abc'
*/
emit(eventType: string) {
const subscriptions: ?[
EmitterSubscription,
] = (this._subscriber.getSubscriptionsForType(eventType): any);
const subscriptions = this._subscriber.getSubscriptionsForType(eventType);
if (subscriptions) {
for (let i = 0, l = subscriptions.length; i < l; i++) {
const subscription = subscriptions[i];
@@ -210,9 +202,7 @@ class EventEmitter {
*
*/
removeListener(eventType: String, listener) {
const subscriptions: ?[
EmitterSubscription,
] = (this._subscriber.getSubscriptionsForType(eventType): any);
const subscriptions = this._subscriber.getSubscriptionsForType(eventType);
if (subscriptions) {
for (let i = 0, l = subscriptions.length; i < l; i++) {
const subscription = subscriptions[i];