Angular 11 tsconfig 路径别名无法识别

Question

我正在使用 Angular 11 并尝试使用像 import {smthg} from '@common' 这样的短导入而不是 import {smthg} from '../../../common'

但我总是在 IDEA 中遇到错误：TS2307: Cannot find module '@common' or its corresponding type declarations.

在尝试编译 .ts 文件时控制台出现同样的错误 (ng serve)

有趣的是，当我将/index 添加到导入时，IDEA 停止诅咒，但错误并没有在控制台中消失

myAngularProject
│   package.json
│   tsconfig.json
│   tsconfig.app.json
│   angular.json    
│
└───src
    │   main.ts
    │   index.html
    │
    └───app
        │  
        └───common
        │
        └───features

tsconfig.json：

/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./src",
    "paths": {
      "@common/*": ["app/common/*"],
      "@features/*": ["app/features/*"],
      "@platform/*": ["app/platform/*"],
      "@env": ["environments/environment"]
    },
    "outDir": "./dist/out-tsc",
    "forceConsistentCasingInFileNames": true,
    "strict": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es2015",
    "module": "es2020",
    "lib": [
      "es2018",
      "dom"
    ]
  },
  "angularCompilerOptions": {
    "strictInjectionParameters": true,
    "strictInputAccessModifiers": true,
    "strictTemplates": true
  }
}

tsconfig.app.json：

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "./out-tsc/app",
    "types": ["node"]
  },
  "files": [
    "src/main.ts",
    "src/polyfills.ts"
  ],
  "include": [
    "src/**/*.d.ts"
  ]
}

IDEA 错误：

控制台 tsc 错误：

版本：

Angular CLI: 11.0.7
Node: 14.2.0
OS: darwin x64

Angular: 11.0.9
... animations, common, compiler, compiler-cli, core, forms
... platform-browser, platform-browser-dynamic, router
Ivy Workspace: Yes

Package                         Version
---------------------------------------------------------
@angular-devkit/architect       0.1100.7
@angular-devkit/build-angular   0.1100.7
@angular-devkit/core            11.0.7
@angular-devkit/schematics      11.0.7
@angular/cli                    11.0.7
@schematics/angular             11.0.7
@schematics/update              0.1100.7
rxjs                            6.6.3
typescript                      4.0.5

Answer 1

事实证明，角度引擎允许根据 tsconfig 中“路径”中指定的内容为路径创建别名。

但为了能够访问模块的子文件夹以及从模块顶层的 index.ts 导出的内容，您需要像这样指定“路径”：

{
  ...
  "compilerOptions": {
    "baseUrl": "src",
    "paths": {
      "@common/*": ["app/common/*"],
      "@common": ["app/common/index.ts"]
    }
  ...
  }
}

Answer 2

我有同样的问题。我试图将使用 Angular 10 制作的项目迁移到 Angular 11，处理 ./src/app 文件夹，但这没有用...

但在一个新项目中，我得到了路径别名以这种方式工作：

• 更新您的 Angular cli：

PS C:\Projects> npm uninstall --g @angular/cli
PS C:\Projects> npm i --g @angular/cli

• 创建一个新项目，将strict mode设置为true：

PS C:\Projects> ng new <<name-project>>
PS C:\Projects> cd <<name-project>>

• 当 CLI 结束时，编辑 tsconfig.app.json 如下：

/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
    "extends": "./tsconfig.json",
    "compilerOptions": {
        "outDir": "./out-tsc/app",
        "types": [],

        // ADD THIS ↓↓↓
        "baseUrl": "./",
        "paths": {
            "@tool/*": [ "src/app/tool/*" ],
            "@models/*": [ "src/app/models/*" ],
            "@services/*": [ "src/app/services/*" ],
            "@components/*": [ "src/app/components/*" ],
            "@interfaces/*": [ "src/app/interfaces/*" ]
        }
        // ADD THIS ↑↑↑
    },
    "files": [
        "src/main.ts",
        "src/polyfills.ts"
    ],
    "include": [
        "src/**/*.d.ts"
    ]
}

• ...和tsconfig.json如下：

/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
    "compileOnSave": false,
    "compilerOptions": {
        "outDir": "./dist/out-tsc",
        "forceConsistentCasingInFileNames": true,
        "strict": true,
        "noImplicitReturns": true,
        "noFallthroughCasesInSwitch": true,
        "sourceMap": true,
        "declaration": false,
        "downlevelIteration": true,
        "experimentalDecorators": true,
        "moduleResolution": "node",
        "importHelpers": true,
        "target": "es2015",
        "module": "es2020",
        "lib": [
            "es2018",
            "dom"
        ],

        // ADD THIS ↓↓↓
        "baseUrl": "./",
        "paths": {
            "@tool/*": [ "src/app/tool/*" ],
            "@models/*": [ "src/app/models/*" ],
            "@services/*": [ "src/app/services/*" ],
            "@components/*": [ "src/app/components/*" ],
            "@interfaces/*": [ "src/app/interfaces/*" ]
        }
        // ADD THIS ↑↑↑
    },
    "angularCompilerOptions": {
        "enableI18nLegacyMessageIdFormat": false,
        "strictInjectionParameters": true,
        "strictInputAccessModifiers": true,
        "strictTemplates": true
    }
}

• ...最后，编辑tsconfig.spec.json 如下：

/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
    "extends": "./tsconfig.json",
    "compilerOptions": {
        "outDir": "./out-tsc/spec",
        "types": [
            "jasmine"
        ],
        "baseUrl": "./",
        "paths": {
            "@tool/*": [ "src/app/tool/*" ],
            "@models/*": [ "src/app/models/*" ],
            "@services/*": [ "src/app/services/*" ],
            "@components/*": [ "src/app/components/*" ],
            "@interfaces/*": [ "src/app/interfaces/*" ]
        }
    },
    "files": [
        "src/test.ts",
        "src/polyfills.ts"
    ],
    "include": [
        "src/**/*.spec.ts",
        "src/**/*.d.ts"
    ]
}

Answer 3

首先，您需要重新启动代码编辑器以确保您的 linter 没有问题。

我遇到了类似的问题，在我的情况下配置是正确的，但由于缺乏经验，我当时不知道，所以我继续尝试我能找到的不同解决方案。事实证明，问题在于 linter 在 IDE 重新启动之前无法看到配置更改（添加的路径定义）。

Answer 4

新版本不再支持路径别名

但您现在可以这样做，直接导入相对于src 目录的文件

转到您的tsconfig.json 文件添加baseUrl 为"."

"compilerOptions": {
    "baseUrl":".",
    ...

现在你可以直接导入相对于src目录的东西

import Myfile from "src/myfile.js"

这对我有用！