仅使用ts-node的npm脚本失败

Question

我有一个看似简单的npm脚本，它失败了，但我似乎找不出原因。我已经全局安装了以下包：

+-- ts-node@8.3.0
+-- tsconfig-paths@3.8.0
+-- typeorm-model-generator@0.3.4
`-- typescript@3.5.2

当我从命令行运行ts-node时，它会按预期运行。

在我的package.json文件中有：

"scripts": {
    "ts_test": "ts-node"
},

当我运行npm run ts_test时，我得到以下错误：

SyntaxError: Unexpected token } in JSON at position 581
    at JSON.parse (<anonymous>)
    at parse (...\node_modules\tsconfig\src\tsconfig.ts:195:15)
    at readFileSync (...\node_modules\tsconfig\src\tsconfig.ts:181:10)
    at Object.loadSync (...\node_modules\tsconfig\src\tsconfig.ts:151:18)
    at readConfig (...\node_modules\ts-node\src\index.ts:425:18)
    at Object.register (...\node_modules\ts-node\src\index.ts:189:18)
    at Object.<anonymous> (...\node_modules\ts-node\src\_bin.ts:140:17)
    at Module._compile (internal/modules/cjs/loader.js:721:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:732:10)
    at Module.load (internal/modules/cjs/loader.js:620:32)

任何有关可能导致此错误的原因或如何进一步调试此错误的建议都会很有帮助。

更新:下面是我的tsconfig文件：

{
  "compilerOptions": {
    "lib": [
      "es2017"
    ],    
    "baseUrl": "/",
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": false,
    "moduleResolution": "node",
    "sourceMap": true,
    "target": "es2017",
    "outDir": "lib",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    "esModuleInterop": true,
  },
  "exclude": [
    "node_modules"
  ]
}

Answer 1

JSON规范不支持尾随逗号。正因为如此，你的tsconfig.json解析失败了。将您的tsconfig.json更改为

{
  "compilerOptions": {
    "lib": [
      "es2017"
    ],    
    "baseUrl": "/",
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "strictNullChecks": true,
    "strictPropertyInitialization": false,
    "moduleResolution": "node",
    "sourceMap": true,
    "target": "es2017",
    "outDir": "lib",
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "esModuleInterop": true
  },
  "exclude": [
    "node_modules"
  ]
}