发布于 2017-08-15 23:56:12 | 188 次阅读 | 评论: 0 | 来源: 网友投递
AngularJS 前端JS框架
AngularJS诞生于Google是一款优秀的前端JS框架，已经被用于Google的多款产品当中。AngularJS有着诸多特性，最为核心的是：MVC、模块化、自动化双向数据绑定、语义化标签、依赖注入，等等。
服务端(nodeJs/express):
let app = require('express')();
let http = require('http').Server(app);
let io = require('socket.io')(http);
io.on('connection', (socket) => {
console.log('user connected');
socket.on('disconnect', function(){
console.log('user disconnected');
});
socket.on('add-message', (message) => {
io.emit('message', {type:'new-message', text: message});
});
});
http.listen(5000, () => {
console.log('started on port 5000');
});
客户端，创建一个ChatService
import { Subject } from 'rxjs/Subject';
import { Observable } from 'rxjs/Observable';
import * as io from 'socket.io-client';
export class ChatService {
private url = 'http://localhost:5000';
private socket;
sendMessage(message){
this.socket.emit('add-message', message);
}
getMessages() {
let observable = new Observable(observer => {
this.socket = io(this.url);
this.socket.on('message', (data) => {
observer.next(data);
});
return () => {
this.socket.disconnect();
};
})
return observable;
}
}
ChatComponent
import { Component, OnInit, OnDestroy } from '@angular/core';
import { Control } from '@angular/common';
import { ChatService } from './chat.service';
@Component({
moduleId: module.id,
selector: 'chat',
template: `<div *ngFor="let message of messages">
{{message.text}}
</div>
<input [(ngModel)]="message" /><button (click)="sendMessage()">Send</button>`,
providers: [ChatService]
})
export class ChatComponent implements OnInit, OnDestroy {
messages = [];
connection;
message;
constructor(private chatService:ChatService) {}
sendMessage(){
this.chatService.sendMessage(this.message);
this.message = '';
}
ngOnInit() {
this.connection = this.chatService.getMessages().subscribe(message => {
this.messages.push(message);
})
}
ngOnDestroy() {
this.connection.unsubscribe();
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持phperz。