typescript 找不到路径中定义的模块

Question

我有一个 typescript 应用程序，它有 paths对于绝对进口。我的 tsconfig 看起来像这样:

{
    "compilerOptions": {
      "baseUrl": ".",
      "paths": {
        "utils*": ["src/utils*"],
        "operations*": ["src/operations*"],
        "actions*": ["src/actions*"],
        "components*": ["src/components*"],
        "constants*": ["src/constants*"],
      },
      "outDir": "dist",
      "module": "esnext",
      "target": "esnext",
      "moduleResolution": "node",
      "noEmit": true,
      "lib": ["es2017", "dom"],
      "noUnusedLocals": true,
      "sourceMap": true,
      "skipLibCheck": true,
      "allowJs": true,
      "jsx": "preserve",
      "noUnusedParameters": true,
      "preserveConstEnums": true,
      "strict": true,
      "allowSyntheticDefaultImports": true,
      "noImplicitAny": true,
    },
    "exclude": [
      "node_modules",
      "dist",
    ],
    "include": [
      "./src/**/*"
    ],
    "files": [
      "./typings/index.d.ts"
    ]
  }

我正在尝试使用这样的导入:

import { AppStateType } from 'actions/app';

但是我得到 cannot find module 'actions/app'
我关注了 this回答，但似乎没有用。

我在这里做错了什么？

Answer 1

图案为paths有点挑剔。

尝试这个:

"paths": {
    "utils/*": ["src/utils/*"],
    "operations/*": ["src/operations/*"],
    "actions/*": ["src/actions/*"],
    "components/*": ["src/components/*"],
    "constants/*": ["src/constants/*"],
},

请注意添加了斜杠。

既然你有 baseUrl我认为这应该可行，但如果不是，下一步可能是指定完整的相对路径(相对于 tsconfig 文件):

"paths": {
    "utils/*": ["./src/utils/*"],
    "operations/*": ["./src/operations/*"],
    "actions/*": ["./src/actions/*"],
    "components/*": ["./src/components/*"],
    "constants/*": ["./src/constants/*"],
},

这将满足 TypeScript 编译器的要求，但是如果您使用 Webpack 或 Parcel，您可能会提示他们无法找到文件，即使 TypeScript 编译得很好。在这种情况下，您需要为打包程序设置别名。它看起来有点像这样:

Webpack

// webpack.config.js or similar
// ...
  resolve: {
    extensions: [".js", ".jsx"], // import without .js, .jsx, .json extensions
    alias: {
      "utils": path.resolve(__dirname, "src/utils/*"),
      "operations": path.resolve(__dirname, "src/operations/*"),
      "actions": path.resolve(__dirname, "src/actions/*"),
      "components": path.resolve(__dirname, "src/components/*"),
      "constants": path.resolve(__dirname, "src/constants/*")
    }
  },

Parcel

// package.json
// ...
  "alias": {
    "utils": "./src/utils/*",
    "operations": "./src/operations/*",
    "actions": "./src/actions/*",
    "components": "./src/components/*",
    "constants": "./src/constants/*"
  }