[英]How do I import an ES6 JavaScript module in my VS Code extension written in TypeScript?
我正在 TypeScript 中開發一個 VS 代碼擴展,我正在嘗試從 npm 導入一個 JavaScript 庫,該庫在其 package.json 中與"type": "module",
打包在一起。
如果我只是簡單地import * as mylib from mylib
我會收到此錯誤消息:
激活擴展 'undefined_publisher.curlconverter' 失敗:必須使用導入加載 ES 模塊:/Users/space/code/curlconverter-extension/curlconverter/node_modules/curlconverter/index.js require() 不支持 ES 模塊。 /Users/space/code/curlconverter-extension/curlconverter/node_modules/curlconverter/index.js 的 require() 來自 /Users/space/code/curlconverter-extension/curlconverter/out/extension.js 是一個 ES 模塊文件,因為它是一個 .js 文件,其最近的父級 package.json 包含 "type": "module" ,它將 package scope 中的所有 .js 文件定義為 ES 模塊。 而是將 index.js 重命名為以 .cjs 結尾,將需要的代碼更改為使用 import(),或從 /Users/space/code/curlconverter-extension/curlconverter/node_modules/curlconverter/package 中刪除“type”:“module”。 json。 .
這告訴我從out/extension.js
中的 TS 生成的 JS 正在使用require()
語句來嘗試加載該 ES6 模塊,但顯然失敗了。
我試圖通過將此行添加到我的tsconfig.json
來生成使用import
的代碼
"module": "ES2020",
但是當我運行我的擴展命令時,我收到了這個錯誤消息(即使我注釋掉了那個庫的導入語句,所以我的擴展只是注冊了一個什么都不做的命令):
激活擴展“undefined_publisher.curlconverter”失敗:無法在模塊外使用導入語句。
我是否需要添加一個package.json
與"type": "module",
到out/
或其他東西?
是的,這是一種痛苦。 具體來說,你可以在 vscode 中使用 es6 模塊開發和調試擴展,但不能部署它們。 當您執行 vsix package 時,您會收到錯誤消息(最近)。
而且 ist 看起來不會很快改變: https://github.com/electron/electron/issues/21457
但是,我們不想再在 commonjs 模塊中編寫代碼了。 好消息 - 正如我們發現的那樣,有一個既令人愉快又可自動化的解決方法:
npx tsc -p tsconfig.json
使用 tsconfing.json 之類的
{
"exclude": [ "node_modules", "cjs" ],
"compilerOptions": {
/* Visit https://aka.ms/tsconfisg.json to read more about this file */
/* Basic Options */
// "incremental": true, /* Enable incremental compilation */
"target": "esnext", /* 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": [ "ESNext"], /* Specify library files to be included in the compilation. */
"allowJs": true, /* Allow javascript files to be compiled. */
"checkJs": false, /* 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": "./cjs", /* 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": true, /* 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": true, /* 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": [], /* 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. */
}
}
https://github.com/electron/electron/issues/21457
您還不能在 Electron 應用程序中使用 ES6 模塊。 VS Code 是一個 Electron 應用程序。
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