Angular 找不到名称缓冲区

Question

尝试使用 Jimp 执行以下代码时，我不断收到此错误。我阅读了这些问题，发现 .28 版本中存在缓冲区问题。我降级到 0.27 并且这没有帮助。我想知道这是否仍然是一个问题，或者我是否错误地导入了文件。

ERROR in node_modules/jimp/jimp.d.ts(18,24): error TS2304: Cannot find name 'Buffer'.

我认为这可能是 .d.ts 文件的错误，因为我没有在代码中使用缓冲区。

我已经将 Jimp 的类型导入到我的开发依赖项中（npm i --save-dev @types/node），但是新版本的 Jimp 说它不需要这些它自己的类型。我还将 "types":["node"] 放入我的 tsconfig.json 文件中。

代码

import { Component, OnInit } from '@angular/core';
import * as jimp from 'jimp';

@Component({
  selector: 'app-jimp-test',
  templateUrl: './jimp-test.component.html',
  styleUrls: ['./jimp-test.component.css']
})
export class JimpTestComponent implements OnInit {

  constructor() { }

  ngOnInit() {
    this.testJimp();
  }

  testJimp() {
    jimp.read('assets/testInput.jpg').then( (img) => {
      img.clone().blur(1).write('assets/testOutput.jpg');
    });
  }

}

依赖关系

{
  "name": "my-playground",
  "version": "0.0.0",
  "scripts": {
    "ng": "ng",
    "start": "ng serve",
    "build": "ng build",
    "test": "ng test",
    "lint": "ng lint",
    "e2e": "ng e2e"
  },
  "private": true,
  "dependencies": {
    "@angular/animations": "^6.0.3",
    "@angular/common": "^6.0.3",
    "@angular/compiler": "^6.0.3",
    "@angular/core": "^6.0.3",
    "@angular/forms": "^6.0.3",
    "@angular/http": "^6.0.3",
    "@angular/platform-browser": "^6.0.3",
    "@angular/platform-browser-dynamic": "^6.0.3",
    "@angular/router": "^6.0.3",
    "core-js": "^2.5.4",
    "jimp": "^0.2.28",
    "rxjs": "^6.0.0",
    "zone.js": "^0.8.26"
  },
  "devDependencies": {
    "@angular-devkit/build-angular": "~0.6.8",
    "@angular/cli": "~6.0.8",
    "@angular/compiler-cli": "^6.0.3",
    "@angular/language-service": "^6.0.3",
    "@types/jasmine": "~2.8.6",
    "@types/jasminewd2": "~2.0.3",
    "@types/jimp": "^0.2.28",
    "@types/node": "^8.9.5",
    "codelyzer": "~4.2.1",
    "jasmine-core": "~2.99.1",
    "jasmine-spec-reporter": "~4.2.1",
    "karma": "~1.7.1",
    "karma-chrome-launcher": "~2.2.0",
    "karma-coverage-istanbul-reporter": "~2.0.0",
    "karma-jasmine": "~1.1.1",
    "karma-jasmine-html-reporter": "^0.2.2",
    "protractor": "~5.3.0",
    "ts-node": "~5.0.1",
    "tslint": "~5.9.1",
    "typescript": "~2.7.2"
  }
}

角度版本

@angular-devkit/architect         0.6.8
@angular-devkit/build-angular     0.6.8
@angular-devkit/build-optimizer   0.6.8
@angular-devkit/core              0.6.8
@angular-devkit/schematics        0.6.8
@angular/cli                      6.0.8
@ngtools/webpack                  6.0.8
@schematics/angular               0.6.8
@schematics/update                0.6.8
rxjs                              6.2.1
typescript                        2.7.2
webpack                           4.8.3

吉普版

0.2.28

配置文件

{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "moduleResolution": "node",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "target": "es5",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2017",
      "dom"
    ]
  }
}

tsconfig.app.json

{
  "extends": "../tsconfig.json",
  "compilerOptions": {
    "outDir": "../out-tsc/app",
    "module": "es2015",
    "types": []
  },
  "exclude": [
    "src/test.ts",
    "**/*.spec.ts"
  ]
}

Answer 1

你可以试试这个：

这一行应该在最上面：

declare const Buffer

它应该编译没有错误。

使用新版本的 Typescript，您还可以使用官方声明文件：

npm i -g typescript@next
npm i --save-dev @types/node

并添加"types" : ["node"]到tsconfig.app.json文件中。