1-1 컴파일
- 타입스크립트 글로벌 설치
npm i typescript -g- ts 코드 작성
// index.ts
function sum(i: number, j: number): number {
return i + j;
}
sum(10, 20);- 컴파일
tsc index.ts- 결과
// index.js
function sum(i, j) {
return i + j;
}
sum(10, 20);1-2 타입스크립트 설정 파일
Documentation - tsc CLI Options
- tsconfig.js를 수동으로 작성하거나 tsc --init 명령어로 생성 및 셋팅
- 자동 생성된 tsconfig.js
{ "compilerOptions": { /* Visit https://aka.ms/tsconfig to read more about this file */ /* Projects */ // "incremental": true, /* Save .tsbuildinfo files to allow for incremental compilation of projects. */ // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ // "tsBuildInfoFile": "./.tsbuildinfo", /* Specify the path to .tsbuildinfo incremental compilation file. */ // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects. */ // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ /* Language and Environment */ "target": "es2016", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ // "jsx": "preserve", /* Specify what JSX code is generated. */ // "experimentalDecorators": true, /* Enable experimental support for TC39 stage 2 draft decorators. */ // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h'. */ // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using 'jsx: react-jsx*'. */ // "reactNamespace": "", /* Specify the object invoked for 'createElement'. This only applies when targeting 'react' JSX emit. */ // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ // "moduleDetection": "auto", /* Control what method is used to detect module-format JS files. */ /* Modules */ "module": "commonjs", /* Specify what module code is generated. */ // "rootDir": "./", /* Specify the root folder within your source files. */ // "moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */ // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ // "typeRoots": [], /* Specify multiple folders that act like './node_modules/@types'. */ // "types": [], /* Specify type package names to be included without being referenced in a source file. */ // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ // "moduleSuffixes": [], /* List of file name suffixes to search when resolving a module. */ // "resolveJsonModule": true, /* Enable importing .json files. */ // "noResolve": true, /* Disallow 'import's, 'require's or '<reference>'s from expanding the number of files TypeScript should add to a project. */ /* JavaScript Support */ // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */ // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from 'node_modules'. Only applicable with 'allowJs'. */ /* Emit */ // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ // "declarationMap": true, /* Create sourcemaps for d.ts files. */ // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ // "sourceMap": true, /* Create source map files for emitted JavaScript files. */ // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If 'declaration' is true, also designates a file that bundles all .d.ts output. */ // "outDir": "./", /* Specify an output folder for all emitted files. */ // "removeComments": true, /* Disable emitting comments. */ // "noEmit": true, /* Disable emitting files from a compilation. */ // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types. */ // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ // "newLine": "crlf", /* Set the newline character for emitting files. */ // "stripInternal": true, /* Disable emitting declarations that have '@internal' in their JSDoc comments. */ // "noEmitHelpers": true, /* Disable generating custom helper functions like '__extends' in compiled output. */ // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ // "preserveConstEnums": true, /* Disable erasing 'const enum' declarations in generated code. */ // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ // "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */ /* Interop Constraints */ // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */ // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ /* Type Checking */ "strict": true, /* Enable all strict type-checking options. */ // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied 'any' type. */ // "strictNullChecks": true, /* When type checking, take into account 'null' and 'undefined'. */ // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ // "strictBindCallApply": true, /* Check that the arguments for 'bind', 'call', and 'apply' methods match the original function. */ // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ // "noImplicitThis": true, /* Enable error reporting when 'this' is given the type 'any'. */ // "useUnknownInCatchVariables": true, /* Default catch clause variables as 'unknown' instead of 'any'. */ // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ // "noUnusedLocals": true, /* Enable error reporting when local variables aren't read. */ // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read. */ // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ // "noUncheckedIndexedAccess": true, /* Add 'undefined' to a type when accessed using an index. */ // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type. */ // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ /* Completeness */ // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ "skipLibCheck": true /* Skip type checking all .d.ts files. */ } } - 당장 필요한 부분만 설정한 내용
// tsconfig.json
{
"compilerOptions": {
/* JavaScript Support */
"allowJs": true /* Allow JavaScript files to be a part of your program. Use the 'checkJS' option to get errors from these files. */,
"checkJs": true /* Enable error reporting in type-checked JavaScript files. */,
/* Type Checking */
"strict": true /* Enable all strict type-checking options. */,
"noImplicitAny": true /* Enable error reporting for expressions and declarations with an implied 'any' type. */
}
}1-3 플레이그라운드
- https://www.typescriptlang.org/ 에서 Playground 메뉴로 접근
- 타입스크립트 작성시 우측 화면에서 tsc에 의해 변환된 js 코드를 확인 가능
Move fast & break things