无法在Node.js 13.6中导入@google/pubsub和其他@google npm模块

Question

我正在做物联网项目，我需要在我的app.js文件中使用@google-cloud/pubsub npm模块！我想使用Node.js 13.6.0作为带有ECMAScript模块的Node.js版本！

// TypeError: PubSub is not a constructor 
import PubSub from '@google-cloud/pubsub';

// SyntaxError: module does not provide an export name 'PubSub'
import { PubSub } from '@google-cloud/pubsub';

// ReferenceError: require is not defined 
const PubSub = require('@google-cloud/pubsub');

Answer 1

我能够使用第一种方法导入PubSub，使用Node.js 13.6.0：

// app.js
import PubSub from '@google-cloud/pubsub';
console.log(PubSub);

// Output
$ node app.js 
(node:17508) ExperimentalWarning: The ESM module loader is experimental.
{
  v1: {
    PublisherClient: [Function: PublisherClient],
    SubscriberClient: [Function: SubscriberClient]
  },
  IAM: [Function: IAM],
  PubSub: [Function: PubSub],
  Snapshot: [Function: Snapshot],
  Message: [Function: Message],
  Subscription: [Function: Subscription],
  Topic: [Function: Topic]
}

您是否安装了Node.js云发布/订阅客户端库？

npm install --save @google-cloud/pubsub

Answer 2

实际上我使用的是：

'use strict';
// Google Cloud PubSub  
const {PubSub} = require('@google-cloud/pubsub');
// Creates a client; cache this for further use
const pubSubClient = new PubSub();