如何在angular 2 typescript app中使用（mqtt）js库？

本文介绍了如何在angular 2 typescript app中使用（mqtt）js库？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我与但仍然得到错误TS2307：找不到模块'mqtt'。

npm install --save mqtt
<s>typings install --save mqtt</s

找不到打字但这确实...

that didn't find the typings but this did...

typings install mqtt --save --ambient

我的tsconfig.conf看起来像这样

my tsconfig.conf looks like this

{
    "compilerOptions": {
        "noImplicitAny": true,
        "module": "commonjs",
        "target": "ES5",
        "emitDecoratorMetadata": true,
        "experimentalDecorators": true,
        "sourceMap": true,
        "declaration": true
    },
    "files": [
        "ng2-mqtt.ts"
    ],
    "exclude": [
        "node_modules"
    ]
}

和 ng2-mqtt.ts 只有这个......

and ng2-mqtt.ts just has this...

export * from './src/mqtt.service'

和 ./ src /mqtt.service.ts 已经..

import {Injectable} from 'angular2/core';
import * as mqtt from 'mqtt';
@Injectable()
export class MqttService {
  constructor() {
     //mqtt.connect('ws://10.0.1.100:3333')
     // ...
  }
}

tsc -version 1.8.10 ，angular2 @2.0.0-beta.17，类型0.8.1，npm 2.14.20，节点v4.4.1，Windows 7

tsc -version 1.8.10, [email protected], typings 0.8.1, npm 2.14.20, node v4.4.1, Windows 7

它是否也会如此很难将Angular 2与其打字世界之外的元素一起使用？

Is it just going to be too hard to use Angular 2 with elements outside of its typescripted world?

推荐答案

我做了以下工作让我的工作：

I did the following to get mine working:

1）首先通过package.json在依赖项中安装ng2-mqtt并运行npm update，以便在node_modules中使用它

1) first install ng2-mqtt via package.json in dependencies and run the npm update so that you have it in your node_modules

2）在index.html中，请务必加入：

2) in your index.html, be sure to include it:

<html>
<head>
    <title>whatever</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <link rel="stylesheet" href="node_modules/bootstrap/dist/css/bootstrap.css">
    <script>document.write('<base href="' + document.location + '" />');</script>
    <script src="node_modules/ng2-mqtt/mqttws31.js" type="text/javascript"></script>

3）将mqtts映射添加到systemjs.config.js（参见map）：

3) Add the mqtts mapping, like so to systemjs.config.js(see map):

System.config({
transpiler: 'typescript',
typescriptOptions: {emitDecoratorMetadata: true},
map: {
    '@angular': 'node_modules/@angular',
    'mqttws31': 'node_modules/ng2-mqtt/mqttws31.js'
},

4）像往常一样导入：

4) Import like you normally would:

import {Paho} from 'mqttws31'

5）使用它在@Component中：

5) use it in your @Component:

 this.client = new Paho.MQTT.Client("localhost", Number(61614), "myclientid_");

    this.client.onConnectionLost = (responseObject: Object) => {
        console.log('Connection lost.');
        this.connected ="false";
      };

    this.client.onMessageArrived = (message: Paho.MQTT.Message) => {
        console.log('Message arrived.');
        this.msg =message.payloadString;
    };

    this.client.connect({ onSuccess: this.onConnected.bind(this); });

如果一切顺利，你应该看到你的连接（假设activemq）：

If all goes well, you should see your connection (assuming activemq):img

请参阅此处了解用法：

Refer to here for usage:https://github.com/icanos/ng2-mqtt

这篇关于如何在angular 2 typescript app中使用（mqtt）js库？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！