Angular 12 将 json 导入 ts

Question

我有一个src/assets/version.json包含此内容的 json 文件：

{"VERSION":"1.0.0"}

然后我将文件导入到*.ts，例如：

import * as VersionInfo from 'src/assets/version.json';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent {

 constructor() {
   console.log(`version ${VersionInfo['VERSION']}`);
 }

}

输出

version 1.0.0

这适用于 Angular 11，但在 Angular 12 上，CLI 显示错误

Should not import the named export 'VERSION' (imported as 'VersionInfo') from default-exporting module (only default export is available soon)

这是我的 tsconfig.base.json

{
  "compileOnSave": false,
  "compilerOptions": {
    "forceConsistentCasingInFileNames": true,
    "noFallthroughCasesInSwitch": true,
    "strictPropertyInitialization": false,
    "baseUrl": "./",
    "importHelpers": true,
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "module": "esnext",
    "moduleResolution": "node",
    "experimentalDecorators": true,
    "noImplicitAny": false,
    "target": "es2015",
    "resolveJsonModule": true,
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2018",
      "dom"
    ],
    "paths": {
      "jszip": [
        "node_modules/jszip/dist/jszip.min.js"
      ]
    }
  },
  "angularCompilerOptions": {
    "fullTemplateTypeCheck": true,
    "strictTemplates": true,
    "strictInjectionParameters": true
  },
}

如何修复这个错误？

Answer 1

以下应该放在 tsconfig.json

{
 ...
 "compilerOptions": {
    ...
    "resolveJsonModule": true, //already there
    "esModuleInterop": true,
    ...
   },
...
"allowSyntheticDefaultImports": true
}

然后只需在您的组件中导入以下内容

import VersionInfo from 'src/assets/version.json';

Answer 2

您可以尝试在tsconfig.json以下位置：

"compilerOptions": { "allowSyntheticDefaultImports":true }

并导入：

import VersionInfo from 'src/assets/version.json';

Answer 3

import { default as VersionInfo } from 'src/assets/version.json';

您还需要上面提到的两个 tsconfig 条目。