An event emitter is a platform for triggering and listening for events.
An event emitter is a platform for triggering and listening for events. Different libraries offer different implementations and for different purposes.
Questions tagged [eventemitter]
960 questions
0
votes
2 answers
Node.js listen and emmit events
I have two classes and i want one class to be subscribed to the other. So
something like this.
Class one:
while(1){
if(true){
//emmit some event
}
Class two:
//wait for class one to emmit some data ,and then start working with the data
My…
DavidS
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- 6
0
votes
1 answer
How to get items in asynchronous environment in different components?
I have main component with this code(without imports):
class AppComponent {
products = null;
productsUpdated = new EventEmitter();
constructor(product_service: ProductService) {
this._product_service = product_service;
…
graver
- 57
- 5
0
votes
1 answer
How to pass a function declared inside an object to child component
I have a DatagridComponent which just displays some rows with data in it. This one can pass action bar items to this component as many as he wants, and pass a function with it which gets called when an items (it's simply a button) gets…
nintschger
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0
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0 answers
JestJS can't instantiate new EventEmmiter in spec files
Whenever I try to test a component which is using eventemitter2 and tries to make a new instance of it so for example import EventEmitter from 'eventemitter2' and then new EventEmitter() in my spec files, it throws an error TypeError:…
Wojciech Jeleń
- 389
- 2
- 11
0
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0 answers
Angular 4 Component to Component Communication
I'm sending an API call on app.component.ts and emitting the change, so i can get the emitted value in the in the child components. Everything is working fine until a router redirect comes. After the router redirects the data is not rendering since…
sinthu225
- 301
- 3
- 16
0
votes
2 answers
Connect event emitter with instance of each ES6 class in node
I'm trying to associate each instance of a class with an event emitter. I'm trying the following:
const events = require("events");
const eventEmitter = new events.EventEmitter();
class Camera {
constructor(ip) {
this.ip = ip;
…
Philip Kirkbride
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0
votes
1 answer
Node ES6 class event emitter function?
I'm trying to create a class for which all instances respond to an event:
const events = require("events");
const eventEmitter = new events.EventEmitter();
class Camera {
constructor(ip) {
this.ip = ip;
}
…
Philip Kirkbride
- 21,381
- 38
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- 225
0
votes
0 answers
@output newEvent emitter deletes the main object propetties issue in angular4?
I have two components
1) usercomponent(parent)
2) multiselectcomponet(child)
usercomponent.ts
items = [{
"Id" : "1",
"companyName" : "Synaptech",
},{
"Id" : "2",
"companyName" :…
Runali
- 332
- 1
- 4
- 17
0
votes
0 answers
Using @Output hide to some child component
My issue is I would replace/hide some child components (Child1, 2 and 3) by a "subchild component" each time the toggleSubChild() function is called using @Output decorator (it's just an idea, maybe there's better way to do that); So each time the…
Emile Cantero
- 1,943
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0 answers
Reassign an event emitter in NodeJS
I'm using the MQTT npm module.
When fires the myMqttObj.on('close',...) event I call myMqttObj.end() and then reassign it with a new connection:
myMqttObj= mqtt.connect(....)
In this way all the previous myMqttObj.on() methods are listening on the…
Nicola
- 465
- 2
- 7
- 19
0
votes
2 answers
Angularjs (1.6) sharing a function using $broadcast,$on?
Is it possible to use $broadcast and $on/$emit to share a function in a component that exists inside its controller to a totally different controller under different component (see pic above)?. I have tried different examples from google, not sure…
jsPlayer
- 1,195
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0
votes
1 answer
@Output() EventEmitter Not Working
I try to make a see more button to get more search results at the moment of clicking.
I have my header in separate arrchivos and I use it with:
For each view.
The button that generates the…
Faber_Hozz
- 1
- 1
0
votes
1 answer
How to create dynamic angular JS 4 child components based on a previous server side call
As soon as my application is launched, I access the IP address of the client and pass it on to the server. Based on the client IP the server will furnish some data.
Using this data I will decide how many child components should be embedded on the…
Adam
- 1,221
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0
votes
2 answers
Node MySQL Pool Cluster Event Emitter Not Working
The documentation gives examples of registering connection event emitters for pools:
pool.on('connection', function (connection) {
connection.query('SET SESSION auto_increment_increment=1');
});
Documentation shows how to get a pool from a…
sam-6174
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0
votes
1 answer
nodejs socket.io can not emit internal event
I am trying to emit logout event to erase client session and disconnect him. But I can not find proper solution online to do it. here is my code with comments:
exports.post = function(req, resp, next) {
var sid = req.session.id;
var io =…
ovod
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