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npm i -D @typescript-eslint/eslint-plugin @typescript-eslint/parser
添加Typescript基本配置文件
Typescript有一个基本的配置文件tsconfig.json,可以使用工具tsc自动生成。
在项目的顶层目录,执行 tsc init即可添加一个默认的tsconfig.json。
在默认生成的基础上,我修改了一些默认配置。最后的配置文件如下:
{
"compilerOptions": {
/* Basic Options */"incremental": true, /* Enable incremental compilation */"target": "es5", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */"module": "es2015", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */"lib": ["DOM"], /* 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', or 'react'. */// "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": 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. *//* 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 */"forceConsistentCasingInFileNames": true/* Disallow inconsistently-cased references to the same file. */
}
}
As part of substituting the value of this with the value returned by a super(...) call, subclassing Error, Array, and others may no longer work as expected. This is due to the fact that constructor functions for Error, Array, and the like use ECMAScript 6's new.target to adjust the prototype chain; however, there is no way to ensure a value for new.target when invoking a constructor in ECMAScript 5.