npm 包有依赖错误，即使在我手动安装它们之后

Question

我正在尝试在我的 Angular Web 应用程序中使用来自 NPM 的 Imgur package。安装后，一切似乎都很好。即使在导入之后。但是，一旦使用包初始化变量，我就会收到编译错误，声称我的代码中存在解析错误，例如“加密”。 NPM 版本：5.6.0 角度版本：6.2.9

您知道是什么原因导致了这个问题吗？关于如何修复它的任何想法？

我尝试安装看似丢失的包，但当我再次尝试编译时，它们仍然被视为丢失。 我还尝试将我的节点版本降级到旧版本，但无济于事。 也没有删除我的 node_modules 并重新安装它们。

这是我在打字稿中用来初始化模块的代码：

import { Component, OnInit } from '@angular/core';
import * as Convert from 'color-convert';
import * as Hex from 'hex2dec';
import * as ClarifaiSVC from '../clarifai_service/clarifai.service';
import * as Imgur from 'imgur';

@Component({
    selector: 'app-imagery',
    templateUrl: './imagery.component.html',
    styleUrls: ['./imagery.component.css']
})

export class ImageryComponent implements OnInit {

    constructor(private Clarifai: ClarifaiSVC.ClarifaiService, private Imgur: Imgur) { }
}

这是服务后 npm 日志中的内容：

ERROR in ./node_modules/aws-sign2/index.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\aws-sign2'ERROR in ./node_modules/aws4/aws4.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\aws4'
ERROR in ./node_modules/ecc-jsbn/index.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\ecc-jsbn'
ERROR in ./node_modules/http-signature/lib/verify.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\http-signature\lib'
ERROR in ./node_modules/http-signature/lib/signer.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\http-signature\lib'
ERROR in ./node_modules/oauth-sign/index.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\oauth-sign'
ERROR in ./node_modules/request/lib/oauth.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\request\lib'
ERROR in ./node_modules/request/lib/helpers.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\request\lib'
ERROR in ./node_modules/request/lib/hawk.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\request\lib'
ERROR in ./node_modules/sshpk/lib/identity.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\sshpk\lib'ERROR in ./node_modules/sshpk/lib/utils.js
ERROR in ./node_modules/sshpk/lib/formats/openssh-cert.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\sshpk\lib\formats'
ERROR in ./node_modules/sshpk/lib/formats/ssh-private.js
Module not found: Error: Can't resolve 'crypto' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\sshpk\lib\formats'
ERROR in ./node_modules/fs.realpath/old.js
Module not found: Error: Can't resolve 'fs' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\fs.realpath'
ERROR in ./node_modules/request/lib/har.js
Module not found: Error: Can't resolve 'fs' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\request\lib'
ERROR in ./node_modules/tunnel-agent/index.js
Module not found: Error: Can't resolve 'http' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\tunnel-agent'
ERROR in ./node_modules/forever-agent/index.js
Module not found: Error: Can't resolve 'https' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\forever-agent'
ERROR in ./node_modules/request/request.js
Module not found: Error: Can't resolve 'https' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\request'
--------------------------------------------


--------------------------------------------
This just goes on for a while
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ERROR in ./node_modules/request/request.js
Module not found: Error: Can't resolve 'stream' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\request'
ERROR in ./node_modules/sshpk/lib/ed-compat.js
Module not found: Error: Can't resolve 'stream' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard\node_modules\sshpk\lib'ERROR in ./node_modules/request/request.js
Module not found: Error: Can't resolve 'zlib' in 'C:\Users\Gilian\Documents\School\3EA2_18-19\Internet Of Things\src\dashboard\dashboard

Answer 1

Crypto is a built-in Node.js module。它不是普通的 JavaScript。

imgur 模块不是为在 Web 浏览器中运行而设计的，因此它不适用于 Angular。它依赖于很多 Node.js 特定的 API（例如文件写入）。

Answer 2

您的安装似乎已损坏。最好的方法是手动删除node_modules 文件夹并重新运行 npm install。这应该在全新安装后工作。

Answer 3

请删除node_modules 并再次运行npm install...

除了imgur，你还必须安装它的类型。

npm install @types/imgur