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TypeScriptのコンパイル時に『error TS2304: Cannot find name 'Map'.』が出た時の対応

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TypeScriptコンパイル時にエラー

TypeScriptのコンパイル時、モジュールにbluebird(request-promiseなどの依存パッケージとしても使われている)を使っている場合、Mapが見つからないエラーとして、

$ tsc -p ./ts --outDir ./js

node_modules/@types/bluebird/index.d.ts:477:33 - error TS2304: Cannot find name 'Map'.

477   props<K, V>(this: PromiseLike<Map<K, Resolvable<V>>>): Bluebird<Map<K, V>>;

のようなエラーが出ることがあります。

対処法

tsconfig.jsonの"lib"の項目に、es6を追加してください。

{
  "compilerOptions": {
    /* Basic Options */
    "target": "es5",      /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
    "module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    // "lib": [],         /* Specify library files to be included in the compilation. */
    // "allowJs": true,   /* Allow javascript files to be compiled. */
    /* Basic Options */
    "target": "es5",      /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
    "module": "commonjs", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
    // "lib": ["es6"],         /* Specify library files to be included in the compilation. */
    // "allowJs": true,   /* Allow javascript files to be compiled. */

コンパイル時の参照ライブラリとしてES6がつかわれ、Mapのビルドが通るようになります。

参考

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