TypeScript(compileOptions-2)

compileOptions : target

{
  "target": {
    "description": "Set the JavaScript language version for emitted JavaScript and include compatible library declarations.",
    "type": "string",
    "default": "ES3",
    "anyOf": [
      {
        "enum": [
          "ES3",
          "ES5",
          "ES6",
          "ES2015",
          "ES2016",
          "ES2017",
          "ES2018",
          "ES2019",
          "ES2020",
          "ESNext"
        ]
      },
      {
        "pattern": "^([Ee][Ss]([356]|(20(1[56789]|20))|[Nn][Ee][Xx][Tt]))$"
      }
    ],
    "markdownDescription": "Set the JavaScript language version for emitted JavaScript and include compatible library declarations.\n\nSee more: https://www.typescriptlang.org/tsconfig#target"
  },
}

compileOptions : lib

{
  "lib": {
    "description": "Specify a set of bundled library declaration files that describe the target runtime environment.",
    "type": "array",
    "uniqueItems": true,
    "items": {
      "type": "string",
      "anyOf": [
        {
          "enum": [
            "ES5", "ES6", "ES2015", "ES2015.Collection", "ES2015.Core", "ES2015.Generator", "ES2015.Iterable", "ES2015.Promise", "ES2015.Proxy", "ES2015.Reflect", "ES2015.Symbol.WellKnown", "ES2015.Symbol", "ES2016", "ES2016.Array.Include", "ES2017", "ES2017.Intl", "ES2017.Object", "ES2017.SharedMemory", "ES2017.String", "ES2017.TypedArrays", "ES2018", "ES2018.AsyncGenerator", "ES2018.AsyncIterable", "ES2018.Intl", "ES2018.Promise", "ES2018.Regexp", "ES2019", "ES2019.Array", "ES2019.Object", "ES2019.String", "ES2019.Symbol", "ES2020", "ES2020.BigInt", "ES2020.Promise", "ES2020.String", "ES2020.Symbol.WellKnown", "ESNext", "ESNext.Array", "ESNext.AsyncIterable", "ESNext.BigInt", "ESNext.Intl", "ESNext.Promise", "ESNext.String", "ESNext.Symbol", "DOM", "DOM.Iterable", "ScriptHost", "WebWorker", "WebWorker.ImportScripts"
          ]
        },
        {
          "pattern": "^[Ee][Ss]5|[Ee][Ss]6|[Ee][Ss]7$"
        },
        {
          "pattern": "^[Ee][Ss]2015(\\.([Cc][Oo][Ll][Ll][Ee][Cc][Tt][Ii][Oo][Nn]|[Cc][Oo][Rr][Ee]|[Gg][Ee][Nn][Ee][Rr][Aa][Tt][Oo][Rr]|[Ii][Tt][Ee][Rr][Aa][Bb][Ll][Ee]|[Pp][Rr][Oo][Mm][Ii][Ss][Ee]|[Pp][Rr][Oo][Xx][Yy]|[Rr][Ee][Ff][Ll][Ee][Cc][Tt]|[Ss][Yy][Mm][Bb][Oo][Ll].[Ww][Ee][Ll][Ll][Kk][Nn][Oo][Ww][Nn]|[Ss][Yy][Mm][Bb][Oo][Ll]))?$"
        },
        {
          "pattern": "^[Ee][Ss]2016(\\.[Aa][Rr][Rr][Aa][Yy].[Ii][Nn][Cc][Ll][Uu][Dd][Ee])?$"
        },
        {
          "pattern": "^[Ee][Ss]2017(\\.([Ii][Nn][Tt][Ll]|[Oo][Bb][Jj][Ee][Cc][Tt]|[Ss][Hh][Aa][Rr][Ee][Dd][Mm][Ee][Mm][Oo][Rr][Yy]|[Ss][Tt][Rr][Ii][Nn][Gg]|[Tt][Yy][Pp][Ee][Dd][Aa][Rr][Rr][Aa][Yy][Ss]))?$"
        },
        {
          "pattern": "^[Ee][Ss]2018(\\.([Aa][Ss][Yy][Nn][Cc][Ii][Tt][Ee][Rr][Aa][Bb][Ll][Ee]|[Ii][Nn][Tt][Ll]|[Pp][Rr][Oo][Mm][Ii][Ss][Ee]|[Rr][Ee][Gg][Ee][Xx][Pp]))?$"
        },
        {
          "pattern": "^[Ee][Ss]2019(\\.([Aa][Rr][Rr][Aa][Yy]|[Oo][Bb][Jj][Ee][Cc][Tt]|[Ss][Tt][Rr][Ii][Nn][Gg]|[Ss][Yy][Mm][Bb][Oo][Ll]))?$"
        },
        {
          "pattern": "^[Ee][Ss]2020(\\.([Bb][Ii][Gg][Ii][Nn][Tt]|[Pp][Rr][Oo][Mm][Ii][Ss][Ee]|[Ss][Tt][Rr][Ii][Nn][Gg]|[Ss][Yy][Mm][Bb][Oo][Ll].[Ww][Ee][Ll][Ll][Kk][Nn][Oo][Ww][Nn]))?$"
        },
        {
          "pattern": "^[Ee][Ss][Nn][Ee][Xx][Tt](\\.([Aa][Rr][Rr][Aa][Yy]|[Aa][Ss][Yy][Nn][Cc][Ii][Tt][Ee][Rr][Aa][Bb][Ll][Ee]|[Bb][Ii][Gg][Ii][Nn][Tt]|[Ii][Nn][Tt][Ll]|[Ss][Yy][Mm][Bb][Oo][Ll]))?$"
        },
        {
          "pattern": "^[Dd][Oo][Mm](\\.[Ii][Tt][Ee][Rr][Aa][Bb][Ll][Ee])?$"
        },
        {
          "pattern": "^[Ss][Cc][Rr][Ii][Pp][Tt][Hh][Oo][Ss][Tt]$"
        },
        {
          "pattern": "^[Ww][Ee][Bb][Ww][Oo][Rr][Kk][Ee][Rr](\\.[Ii][Mm][Pp][Oo][Rr][Tt][Ss][Cc][Rr][Ii][Pp][Tt][Ss])?$"
        }
      ]
    },
    "markdownDescription": "Specify a set of bundled library declaration files that describe the target runtime environment.\n\nSee more: https://www.typescriptlang.org/tsconfig#lib"
  }
}

target 과 lib

• target
  • 빌드의 결과물을 어떤 버전으로 할 것이냐
  • 지정을 안하면 es3 입니다.
• lib
  • 기본 type definition 라이브러리를 어떤 것을 사용할 것이냐
  • lib 를 지정하지 않을 때,
    • target 이 'es3' 이고, 디폴트로 lib.d.ts 를 사용합니다.
    • target 이 'es5' 이면, 디폴트로 dom, es5, scripthost 를 사용합니다.
    • target 이 'es6' 이면, 디폴트로 dom, es6, dom.iterable, scripthost 를 사용합니다.
• lib 를 지정하면 그 lib 배열로만 라이브러리를 사용하니다.
  • 빈 [] => 'no definition found 어쩌구'