eventemitter

问题 I'm trying to make a wrapper component for an <input/> element in Vue.js. Component: <template> <div> <input v-bind="$attrs" :value="value" @input="input" /> ... </div> <template> Vue.component("my-input", { inheritAttrs: false, props: ['value'], methods: { input($event): void { this.$emit("input", $event.target.value) } } }) Usage: <my-input v-model="myModel" /> This seems to work just fine. The model gets updated via the input event handler by emitting the target element value. However, now

问题 Given a Typescript interface and a class extending Node.js EventEmitter, is it possible to define custom listeners that give typesafe check for the function arguments? Given the following example: import { EventEmitter } from 'events'; interface Payload { id: string; weight: number; } class CustomEventEmitter extends EventEmitter { constructor() { super(); this.on('my_event', (data) => { // I would like data to be implicitly inferred as Payload type console.log(data.weight); // This should

问题 Why Event Emitter can't use in service in angular 6? In Angular documentation they mentioned, "Use in directives and components to emit custom events" 回答1: Because in services all waht you have to do is manipulating data, if you want to notify the data changes you can use Subjet or BehaviorSubjet . EventEmitter is generally used to notify changes from child to parent and as said is supposed to be used only for @Output . please take a look at this link 来源： https://stackoverflow.com/questions

问题 I am trying to emit data from child to parent using the composition API I get the following warning. [Vue warn]: Extraneous non-emits event listeners (updatedcount) were passed to component but could not be automatically inherited because component renders fragment or text root nodes. If the listener is intended to be a component custom event listener only, declare it using the "emits" option.at <HelloWorld onUpdatedcount=fn > at childcomponent.vue <template> <h1>{{ store.count }}</h1>

问题 I have a navigation bar component, a content component and a parent component that connects the two. Whenever I click on a list-item inside the navigation bar the content component shows different content by changing the booleans to false/true. That works perfectly fine, however when I try to change the content of the content component by changing the value of the @Input variable it doesn't work. nav-admin.html <div id="nav"> <ul class="navElement"> <li (click)="changeComponent(

问题 I am writing a web app where multiple listeners(Evcentsource SSE clients JS) will be connected to my server . what i want to do is Store SSE emitter per connected listener : can be done in memory or any other means by assigning id to each client I am able to achieve this so far Now the question ; How do i send a response/event to specific client connected to my web app ? while doing this SSEEmmiters stored are either getting completed or timed out. how do i prevent this ? how do i keep

问题 I am using server sent events in MEAN stack. I am able to push data from server to client whenever required. But one thing i noticed that even if i am the only client hitting the server. There are multiple listeners for me and events are broadcast to say 40 listeners ( if i wait long enough for the client to reconnect 40 times ). Multiple listeners are also created when user reloads . How can i limit the listeners to say 1 listener to per event per client . Is this even possible with server

问题 In Node.js I was able to make a WordPress clone rather easily using the EventEmitter to replicate and build a hooks-system into the CMS core, which plugins could then attach to. I now need this same level of extensibility and core isolation for my CMS written in and ported to Go. Basically I have the core finished now, but in order to make it truly flexible I have to be able to insert events (hooks) and to have plugins attach to these hooks with additional functionality. I don't care about

问题 I was using EventEmitter and @Output in Angular services, today one of the coleagues mentioned it's not a good practice. I found this post mentioning it's a bad practice and it seems mostly is personal opinion, and this answer is mentioning it's OK to use it. I couldn't find any official document about it, so if somebody knows an official answer for it please post. Official doc about EventEmittter 回答1: I was using EventEmitter and @Output in Angular services, today one of the coleagues

问题 I can write non-blocking I/O in Node.js very easily. It's what the entire library is set up for. But any computation done is blocking. Any message passing over event emitters are blocking. For example, emitting events are resolved immediately and are thus blocking: var e = new process.EventEmitter; e.on("foo", function() { console.log("event"); }); process.nextTick(function() { console.log("next tick"); }); setTimeout(function() { console.log("timeout"); }, 0); e.emit("foo"); > event > next