我在我的项目中使用 typescript，当我使用 yarn tsc --outDir ./dist 从 .ts 转换为 .js 并运行我的 start (npm run start) 脚本时，会抛出此错误。
(node:29544) UnhandledPromiseRejectionWarning: C:\Users\PC\Desktop\project\source\entities\Compliment.ts:1
import { Entity, PrimaryColumn, Column, CreateDateColumn, JoinColumn, ManyToMany, ManyToOne } from "typeorm";
SyntaxError: Cannot use import statement outside a module
package.json
{
"name": "API",
"version": "1.0.0",
"main": "./dist/index.js",
"license": "MIT",
"scripts": {
"dev": "ts-node-dev source/server.ts",
"typeorm": "ts-node-dev ./node_modules/typeorm/cli.js",
"start": "node ./dist/server.js"
},
"devDependencies": {
"@types/bcryptjs": "^2.4.2",
"@types/cors": "^2.8.10",
"@types/express": "^4.17.12",
"@types/jsonwebtoken": "^8.5.2",
"@types/uuid": "^8.3.0",
"ts-node-dev": "^1.1.6",
"typescript": "^4.3.4"
},
"dependencies": {
"bcryptjs": "^2.4.3",
"celebrate": "^14.0.0",
"class-transformer": "^0.4.0",
"cors": "^2.8.5",
"dotenv": "^10.0.0",
"express": "^4.17.1",
"express-async-errors": "^3.1.1",
"jsonwebtoken": "^8.5.1",
"morgan": "^1.10.0",
"nodemon": "^2.0.7",
"pg": "^8.6.0",
"reflect-metadata": "^0.1.13",
"typeorm": "^0.2.34",
"uuid": "^8.3.2"
}
}
tsconfig.json
{
"compilerOptions": {
/* Visit https://aka.ms/tsconfig.json to read more about this file */
/* Basic Options */
// "incremental": true, /* Enable incremental compilation */
"target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', 'ES2021', or 'ESNEXT'. */
"module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
// "lib": [], /* Specify library files to be included in the compilation. */
// "allowJs": true, /* Allow javascript files to be compiled. */
// "checkJs": true, /* Report errors in .js files. */
// "jsx": "preserve", /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
// "declaration": true, /* Generates corresponding '.d.ts' file. */
// "declarationMap": true, /* Generates a sourcemap for each corresponding '.d.ts' file. */
// "sourceMap": true, /* Generates corresponding '.map' file. */
// "outFile": "./", /* Concatenate and emit output to single file. */
// "outDir": "./", /* Redirect output structure to the directory. */
// "rootDir": "./", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
// "composite": true, /* Enable project compilation */
// "tsBuildInfoFile": "./", /* Specify file to store incremental compilation information */
// "removeComments": true, /* Do not emit comments to output. */
// "noEmit": true, /* Do not emit outputs. */
// "importHelpers": true, /* Import emit helpers from 'tslib'. */
// "downlevelIteration": true, /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
// "isolatedModules": true, /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
/* Strict Type-Checking Options */
"strict": false, /* Enable all strict type-checking options. */
// "noImplicitAny": true, /* Raise error on expressions and declarations with an implied 'any' type. */
// "strictNullChecks": true, /* Enable strict null checks. */
// "strictFunctionTypes": true, /* Enable strict checking of function types. */
// "strictBindCallApply": true, /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
"strictPropertyInitialization": false, /* Enable strict checking of property initialization in classes. */
// "noImplicitThis": true, /* Raise error on 'this' expressions with an implied 'any' type. */
// "alwaysStrict": true, /* Parse in strict mode and emit "use strict" for each source file. */
/* Additional Checks */
// "noUnusedLocals": true, /* Report errors on unused locals. */
// "noUnusedParameters": true, /* Report errors on unused parameters. */
// "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
// "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
// "noUncheckedIndexedAccess": true, /* Include 'undefined' in index signature results */
// "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an 'override' modifier. */
// "noPropertyAccessFromIndexSignature": true, /* Require undeclared properties from index signatures to use element accesses. */
/* Module Resolution Options */
// "moduleResolution": "node", /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
// "baseUrl": "./", /* Base directory to resolve non-absolute module names. */
// "paths": {}, /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
// "rootDirs": [], /* List of root folders whose combined content represents the structure of the project at runtime. */
"typeRoots": ["./source/@types"], /* List of folders to include type definitions from. */
// "types": [], /* Type declaration files to be included in compilation. */
// "allowSyntheticDefaultImports": true, /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
"esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
// "preserveSymlinks": true, /* Do not resolve the real path of symlinks. */
// "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */
/* Source Map Options */
// "sourceRoot": "", /* Specify the location where debugger should locate TypeScript files instead of source locations. */
// "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */
// "inlineSourceMap": true, /* Emit a single file with source maps instead of having a separate file. */
// "inlineSources": true, /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
/* Experimental Options */
"experimentalDecorators": true, /* Enables experimental support for ES7 decorators. */
"emitDecoratorMetadata": true, /* Enables experimental support for emitting type metadata for decorators. */
/* Advanced Options */
"skipLibCheck": true, /* Skip type checking of declaration files. */
"forceConsistentCasingInFileNames": true /* Disallow inconsistently-cased references to the same file. */
}
}
导致/抛出此错误的代码行：
import { Entity, PrimaryColumn, Column, CreateDateColumn, JoinColumn, ManyToOne } from "typeorm";
我试过使用 nodemon 模块，我试过在 --experimental-modules 脚本中添加 start 标志，但没有任何效果
答案 0 :(得分：0)
您可以将 'type': 'module' 添加到 package.json 以启用导出 ES6。