Question

我无法将JSON文件导入Angular 7库中的环境文件。我的environment.ts文件如下所示：

import firebase from './firebase.json';

export const environment = {
  production: false,
  firebase,
};

还有firebase.json：

{
  "apiKey": "",
  "authDomain": "",
  "databaseURL": "",
  "projectId": "",
  "storageBucket": "",
  "messagingSenderId": ""
}

但是不幸的是，运行ng build时它失败了：

> sdk@0.0.0 build <path-to-project>/sdk
> ng build sdk

Building Angular Package
Building entry point 'sdk'
Compiling TypeScript sources through ngc
Bundling to FESM2015

BUILD ERROR
Unexpected token / in JSON at position 0
SyntaxError: Unexpected token / in JSON at position 0
    at JSON.parse (<anonymous>)
    at Object.transform (<path-to-project>/sdk/node_modules/rollup-plugin-json/dist/rollup-plugin-json.cjs.js:18:20)
    at <path-to-project>/sdk/node_modules/rollup/dist/rollup.js:20962:25

Unexpected token / in JSON at position 0
SyntaxError: Unexpected token / in JSON at position 0
    at JSON.parse (<anonymous>)
    at Object.transform (<path-to-project>/sdk/node_modules/rollup-plugin-json/dist/rollup-plugin-json.cjs.js:18:20)
    at <path-to-project>/sdk/node_modules/rollup/dist/rollup.js:20962:25
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! sdk@0.0.0 build: `ng build sdk`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the sdk@0.0.0 build script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     xxx/.npm/_logs/2019-04-10T13_40_47_486Z-debug.log

我已经尝试过：

1）添加到tsconfig.json

"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"noImplicitAny": false,

2）将typings.d.ts添加到

declare module '*.json' {
  const value: any;
  export default value;
}

3）将import更改为require

但到目前为止还没有运气。

我的devDependencies包括：

"@angular-devkit/build-ng-packagr": "^0.13.8",
"@angular/cli": "~7.3.6",
"@angular/common": "~7.2.0",
"@angular/compiler": "^7.2.12",
"@angular/compiler-cli": "^7.2.12",
...

Answer 1

经历了许多苦难之后，我们找到了解决方法here。

基本上，这是您在第一次尝试中所做的，但是您需要再添加一个选项。

"resolveJsonModule": true,  
"esModuleInterop": true,
"allowSyntheticDefaultImports": true

另外：

annotateForClosureCompiler: false

注意：对于最后一个道具，它是相同的文件，但是没有将其添加到compilerOptions，而是将其添加到angularCompilerOptions

如何将JSON文件导入Angular库？

1 个答案: