找不到模块:错误:无法解析'/ opt/lampp/htdocs/angular-testing-app/node_modules/jwa'中的'crypto'

Question

我将在我的angular6项目中安装jsonwebtoken模块npm i jsonwebtoken.安装了jsonwebtoken模块Dependencies jwa,但是index.js文件加密需要错误无法解析'crypto',但我已经安装了crypto模块.

请帮助并解决问题.

我的错误:

ERROR in ./node_modules/jwa/index.js
Module not found: Error: Can't resolve 'crypto' in '/opt/lampp/htdocs/angular-testing-app/node_modules/jwa'
ERROR in ./node_modules/jws/lib/sign-stream.js
Module not found: Error: Can't resolve 'stream' in '/opt/lampp/htdocs/angular-testing-app/node_modules/jws/lib'
ERROR in ./node_modules/jws/lib/verify-stream.js
Module not found: Error: Can't resolve 'stream' in '/opt/lampp/htdocs/angular-testing-app/node_modules/jws/lib'
ERROR in ./node_modules/jws/lib/data-stream.js
Module not found: Error: Can't resolve 'stream' in '/opt/lampp/htdocs/angular-testing-app/node_modules/jws/lib'

Answer 1

我遇到了和你一样的问题,我解决了.您可以按照以下步骤操作:

1. 将此文件添加到根目录

patch.js

const fs = require('fs');
const f = 'node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/browser.js';

fs.readFile(f, 'utf8', function (err,data) {
  if (err) {
    return console.log(err);
  }
  var result = data.replace(/node: false/g, 'node: {crypto: true, stream: true}');

  fs.writeFile(f, result, 'utf8', function (err) {
    if (err) return console.log(err);
  });
});

2. 将此命令添加到package.json文件

的package.json

{...
  "scripts": {
    "postinstall": "node patch.js",
    ...
  }
}

参考:https://gist.github.com/niespodd/1fa82da6f8c901d1c33d2fcbb762947d

Answer 2

但我没有使用预安装，而是手动编辑了“node_modules/@angular-devkit/build-angular/src/angular-cli-files/models/webpack-configs/browser.js”并更改了该正则表达式中的行:

// old:
node: false,
// new:
node: { crypto: true, stream: true },