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  1. JavaScript

webpack-babel

webpack

์›นํŒฉ์€ ์˜คํ”ˆ์†Œ์Šค๋กœ js ๋ชจ๋“ˆ bundler์ด๋‹ค. (bundler๋ž€ ์–ด๋– ํ•œ ๋‹จ์œ„๋กœ ์—ฌ๋Ÿฌ๊ฐœ์˜ ํŒŒ์ผ๋“ค์„ ํ•˜๋‚˜๋กœ ๋งŒ๋“ค์–ด ์š”์ฒญ์˜ ์‘๋‹ต์„ ํ•˜๊ธฐ์œ„ํ•œ ํ™˜๊ฒฝ์„ ๊ด€๋ฆฌํ•˜๋Š” ๊ฒƒ.

ํ•œ ํŽ˜์ด์ง€์— ์—ฌ๋Ÿฌ๊ฐœ๋กœ ๋‚˜๋ˆ„์–ด์ง„ ์ˆ˜๋งŽ์€ ๋ฐ์ดํ„ฐ ํŒŒ์ผ๋“ค(css,js๋“ฑ)์„ ํ•˜๋‚˜ํ•˜๋‚˜ ์š”์ฒญํ›„ ์‘๋‹ตํ•˜๊ธฐ์—๋Š” ์‹œ๊ฐ„์ด ์˜ค๋ž˜๊ฑธ๋ฆฌ๊ธฐ ๋•Œ๋ฌธ์— ์ด๋Ÿฐ ๋ชจ๋“ˆ๋“ค์„ ํ•˜๋‚˜๋กœ ํ•ฉ์ณ์ฃผ๋Š” ์—ญํ• ์„ ํ•˜๋Š” ๋ฒˆ๋“ค๋Ÿฌ

๋ฒˆ๋“ค๋Ÿฌ๋ž€? ์˜์กด์„ฑ์ด ์žˆ๋Š” ํŒŒ์ผ(๋ชจ๋“ˆ)๊ฐ„ ํ•˜๋‚˜๋กœ ๋งŒ๋“ค์–ด ์ฃผ๋Š” ๋„๊ตฌ ์ฝ”๋“œ์˜ ์˜์กด์„ฑ(dependecy)๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๊ธฐ ์œ„ํ•จ

Js์— ๋ชจ๋“ˆ์ด ๋„์ž…๋˜๋ฉด์„œ ์ˆ˜๋งŽ์€ ๋ชจ๋“ˆ๋“ค์„ ์„ฑ๋Šฅ์ ์œผ๋กœ ๋ฌธ์ œ๋ฅผ ํ•ด๊ฒฐํ•˜๊ณ  ๊ด€๋ฆฌํ•˜๊ธฐ ์œ„ํ•ด ๋“ฑ์žฅ

๋นŒ๋“œ ๋„๊ตฌ [Webpack/Grunt/Gulp ๋“ฑ์ด ์žˆ๋‹ค.])_

webpack์˜ ํƒ„์ƒ ๋ฐฐ๊ฒฝ

Js๋ฅผ ๋ชจ๋“ˆํ™” ํ•˜๊ธฐ ์œ„ํ•ด ํƒ„์ƒํ–ˆ์œผ๋ฉฐ, ๊ทธ ์‹œ์ž‘์œผ๋กœ๋Š” ์•„๋ž˜์™€ ๊ฐ™์€ ๋ช…์„ธ๋ฅผ ๋ฟŒ๋ฆฌ๋กœ ์‹œ์ž‘ํ•œ๋‹ค.

ํ•˜๋‚˜์˜ ํ”„๋กœ์ ํŠธ ๋‚ด์— ์กด์žฌํ•˜๋Š” ์—ฌ๋Ÿฌ๊ฐœ์˜ ํŒŒ์ผ๋“ค์„ ์„œ๋กœ ๋ถˆ๋Ÿฌ๋‹ค ์“ฐ๋‹ค๋ณด๋ฉด, ๋ฐœ์ƒํ•˜๋Š” ๋ณ€์ˆ˜ ์ถฉ๋Œ์˜ ์œ„ํ—˜์„ฑ์„ ํ•ด๊ฒฐ ํ•˜๊ธฐ ์œ„ํ•ด IIFE(์ฆ‰์‹œ ํ•จ์ˆ˜ ํ˜ธ์ถœ)์˜ ๋ฐฉ์‹์œผ๋กœ ๋ชจ๋“ˆํ™”๋ฅผ ํ•ด์ฃผ๋Š” ๋ฐฉ๋ฒ•์œผ๋กœ ๋Œ€ํ‘œ์ ์ธ ๋ช…์„ธ๊ฐ€ CommonJs์™€ AMD๊ฐ€ ์žˆ๋‹ค.

CommonJs์˜ ํƒ„์ƒ๋ฐฐ๊ฒฝ์€ JS๋ฅผ ๋ธŒ๋ผ์šฐ์ € ๋ฐ–์œผ๋กœ ๊บผ๋‚ด๊ธฐ ์œ„ํ•ด ๋ชจ๋“ˆํ™”๋ฅผ ์‹œํ‚ค๋ฉด์„œ ์ƒ๊ฒจ๋‚ฌ์œผ๋ฉฐ, ์ด๋ฅผ ๊ธฐ๋ฐ˜์œผ๋กœํ•œ ๋‹ค์–‘ํ•œ ํ”„๋กœ์ ํŠธ๊ฐ€ ์žˆ๋‹ค.

๋‹จ์ ์œผ๋กœ ํ•„์š”ํ•œ ๋ชจ๋“ˆ์„ ๋ชจ๋‘ ๋‚ด๋ ค๋ฐ›์„๋•Œ๊นŒ์ง€ ์•„๋ฌด๊ฒƒ๋„ ํ•  ์ˆ˜ ์—†๊ฒŒ ๋˜๋Š” ๊ฒƒ. ๋ธŒ๋ผ์šฐ์ €์—์„œ ๋™์ž‘ํ• ๋•Œ๋Š” ๋น„๋™๊ธฐ ๋ชจ๋“ˆ ๋กœ๋“œ ๋ฌธ์ œ๋กœ ํŒŒ์ผ ๋‹จ์œ„์˜ ์Šค์ฝ”ํ”„๊ฐ€ ์กด์žฌ ํ•˜์ง€ ์•Š๊ณ  ์ „์—ญ๋ณ€์ˆ˜ ๋ฌธ์ œ๊ฐ€ ๋ฐœ์ƒํ•˜์—ฌ require.define()ํ•จ์ˆ˜๋ฅผ ์ด์šฉํ•ด ์ „์—ญ๋ณ€์ˆ˜๋ฅผ ํ†ต์ œ

AMD๋Š” ๋น„๋™๊ธฐ ์ƒํ™ฉ์—์„œ๋„ JS๋ชจ๋“ˆ์„ ์‚ฌ์šฉํ•˜๊ธฐ ์œ„ํ•ด ํƒ„์ƒํ•œ ๋ช…์„ธ.

CommonJs์™€ AMD ๋Š” ๋ชจ๋“ˆ ๋กœ๋“œ ๋ฐฉ์‹์˜ ์ฐจ์ด. ํŒŒ์ผ์ด ๋ชจ๋‘ ๋กœ์ปฌ ๋””์Šคํฌ์— ์žˆ์„๋•Œ๋Š” CommonJs๊ฐ€ ๋„คํŠธ์›Œํฌ๋ฅผ ํ†ตํ•ด ๋‚ด๋ ค๋ฐ›์•„์•ผํ•˜๋Š” ๊ฒฝ์šฐ AMD๊ฐ€ ๋” ์œ ์—ฐํ•œ ๋ฐฉ๋ฒ• ์ œ๊ณต

webpack ํ•ต์‹ฌ 4๊ฐ€์ง€ ๊ฐœ๋…

  • ์—”ํŠธ๋ฆฌ : ๋ชจ๋“  ํŒŒ์ผ์„ ๋ชจ๋“ˆํ™”ํ•ด์„œ ๋ฌถ๋Š” ์›นํŒฉ์—์„œ ๊ทธ ์‹œ์ž‘์  ์„œ๋กœ ์—ฐ๊ฒฐ๋˜์–ด์žˆ๋Š” ๋ชจ๋“ˆ๊ฐ„์˜ ์˜์กด์„ฑ๋“ค์˜ ์‹œ์ž‘ ๋ชจ๋“ˆ

    {
      entry: {
        1: 'ํŒŒ์ผ๊ฒฝ๋กœ,
        2: 'ํŒŒ์ผ๊ฒฝ๋กœ,
      }
    } //1.js / 2.js ๋‘๊ฐœ ์ƒ์„ฑ
    
    {
      entry: {
      1: ['a.js','b.js']
      }
    } // a.js์™€ b.js๋ฌถ์–ด 1.js ์ƒ์„ฑ
  • ์•„์›ƒํ’‹ : ์—”ํŠธ๋ฆฌ์— ์„ค์ •ํ•œ JsํŒŒ์ผ์„ ์‹œ์ž‘์œผ๋กœ ๋ชจ๋“  ๋ชจ๋“ˆ์„ ํ•˜๋‚˜๋กœ ๋ฌถ์–ด ์ฒ˜๋ฆฌํ•œ ๊ฒฐ๊ณผ๋ฌผ๋กœ ์—ฌ๊ธฐ์— ๋ช…์‹œ๋˜์–ด ์žˆ๋Š” ์ •๋ณด๋ฅผ ํ†ตํ•ด ๋นŒ๋“œ ํŒŒ์ผ ์ƒ์„ฑ

    • path : ๊ฒฐ๊ณผ ํŒŒ์ผ ์ €์žฅ๋  ๊ฒฝ๋กœ

    • publicPath : ํŒŒ์ผ๋“ค์ด ์œ„์น˜ํ•  ์„œ๋ฒ„์ƒ์˜ ๊ฒฝ๋กœ

    • filename : ํŒŒ์ผ์ด๋ฆ„ ([name]์œผ๋กœ ํŒŒ์ผ์ด๋ฆ„์„ ์‚ฌ์šฉํ•˜๋ฉด entry์˜ ์ด๋ฆ„์ด ์ ์šฉ๋œ๋‹ค.)

  • ๋กœ๋” : webpack์€ js, ์ด๋ฏธ์ง€, css, file๋“ฑ ๋ชจ๋‘ ๋ชจ๋“ˆ๋กœ ๋ณด๊ณ  ๊ด€๋ฆฌํ•œ๋‹ค๊ณ  ํ–ˆ๊ธฐ ๋•Œ๋ฌธ์—, js๋ฐ–์— ์ดํ•ด๋ฅผ ๋ชปํ•˜๋Š” webpack์„ ์œ„ํ•ด ์ดํ•ดํ• ์ˆ˜ ์žˆ๊ฒŒ ๋ณ€๊ฒฝํ•ด์ฃผ๋Š” ์—ญํ• ์„ ํ•˜๋Š” ๊ฒƒ.

    babel-loader, css-loader, style-loader, file-loader, url-loader, custom-loader๋“ฑ ๋‹ค์–‘ํ•˜๊ฒŒ ์กด์žฌํ•˜๊ณ  ์ •์˜ํ•  ์ˆ˜ ์žˆ๋‹ค.

    JSX๋‚˜ TS์™€ ๊ฐ™์€ ๋ฌธ๋ฒ•์„ ๋ธŒ๋ผ์šฐ์ €๊ฐ€ ์ดํ•ดํ•  ์ˆ˜ ์žˆ๊ฒŒ js๋กœ ๋ฐ”๊ฟ”์ฃผ๋Š” ๊ธฐ๋Šฅ

    • target : ์ง€์›ํ•˜๊ธธ ์›ํ•˜๋Š” ํ™˜๊ฒฝ

    • modules : false๋กœ ํ•˜๋ฉด ์ตœ์‹ ๋ชจ๋“ˆ ์‹œ์Šคํ…œ์ด ๊ทธ๋Œ€๋กœ ์œ ์ง€๋˜ ํŠธ๋ฆฌ ์‰์ดํ‚น์ด ๋œ๋‹ค.(์‚ฌ์šฉํ•˜์ง€ ์•Š์€ ๋ชจ๋“ˆ๋“ค์„ ์ •๋ฆฌํ•ด์ฃผ๋Š” ๊ธฐ๋Šฅ)

    • useBuiltIns : entry์˜ ํŒŒ์ผ๋“ค์„ target์— ๋งž๊ฒŒ ๋ฐ”๊พธ์–ด์ฃผ๋Š” ์—ญํ• 

      • entry

      • usage

      • false

  • ํ”Œ๋Ÿฌ๊ทธ์ธ : ๋ฒˆ๋“ค๋œ ๊ฒฐ๊ณผ๋ฌผ์„ ์ฒ˜๋ฆฌํ•˜๋ฉฐ, ๋ฒˆ๋“ค๋œ js๋ฅผ ๋‚œ๋…ํ™” ํ•˜๊ฑฐ๋‚˜ ํŠน์ • ํ…์ŠคํŠธ๋ฅผ ์ถ”์ถœํ•˜๋Š” ์šฉ๋„.

์ถ”๊ฐ€ ๊ฐœ๋…

  • mode : development / production

  • resolve : ์›นํŒฉ์ด ์•Œ์•„์„œ ๊ฒฝ๋กœ๋‚˜ ํ™•์žฅ์ž๋ฅผ ์ฒ˜๋ฆฌํ•  ์ˆ˜ ์žˆ๊ฒŒ ๋„์™€์ฃผ๋Š” ์˜ต์…˜

    • modules : ๋ชจ๋“ˆ๋“ค์˜ ๋ฃจํŠธ ๋””๋ ‰ํ† ๋ฆฌ๋ฅผ ์„ค์ •ํ•˜๋ฉด ์ด๋ฅผ ํ†ตํ•ด ์ธ์‹

    • extensions : ์ง€์ •ํ•œ ํ™•์žฅ์ž๋“ค์„ ์•Œ์•„์„œ ์ฒ˜๋ฆฌํ•ด ์ค€๋‹ค.

Polyfill

์›น ๊ฐœ๋ฐœ์— ์žˆ์–ด ์–ด๋–ค ๊ธฐ๋Šฅ์„ ์ง€์›ํ•˜์ง€ ์•Š๋Š” ์›น๋ธŒ๋ผ์šฐ์ € ์ƒ์—์„œ ๊ทธ ๊ธฐ๋Šฅ์„ ๊ตฌํ˜„ํ•˜๊ธฐ ์œ„ํ•œ ์ฝ”๋“œ๋กœ Js๋Š” ๊ณ„์†ํ•ด์„œ ๋ฐœ์ „ํ•˜๋Š” ์–ธ์–ด์ด๊ธฐ ๋•Œ๋ฌธ์— ์›น ๋ธŒ๋ผ์šฐ์ €๋ฅผ ๋งŒ๋“œ๋Š” ๊ณณ์—์„œ์˜ JS ์—”์ง„๋˜ํ•œ ์ง€์†์ ์ธ ์—…๋ฐ์ดํŠธ๊ฐ€ ์—†๋‹ค๋ฉด ์ƒˆ๋กœ์šด ๋ฌธ๋ฒ•,๊ธฐ๋Šฅ์„ ์ง€์›ํ•˜์ง€ ์•Š๊ธฐ ๋•Œ๋ฌธ์— ํ˜ธํ™˜์„ฑ์„ ์œ„ํ•œ ์ฝ”๋“œ์ด๋‹ค.

babel ์ด๋ž€

Babel์€ ์ตœ์‹  ๋ฒ„์ „์˜ JavaScript๋กœ ์ฝ”๋“œ๋ฅผ ์ž‘์„ฑํ•˜๋Š” ๋ฐ ๋„์›€์ด๋˜๋Š” ๋„๊ตฌ์ž…๋‹ˆ๋‹ค. ์ง€์›๋˜๋Š” ํ™˜๊ฒฝ์ด ํŠน์ • ๊ธฐ๋Šฅ์„ ๊ธฐ๋ณธ์ ์œผ๋กœ ์ง€์›ํ•˜์ง€ ์•Š๋Š” ๊ฒฝ์šฐ Babel์€ ํ•ด๋‹น ๊ธฐ๋Šฅ์„ ์ง€์›๋˜๋Š” ๋ฒ„์ „์œผ๋กœ ์ปดํŒŒ์ผํ•˜๋„๋ก ๋„์™€์ค๋‹ˆ๋‹ค.

babel์€ ์˜คํ”ˆ ์†Œ์Šค๋กœ์จ, js ์ปดํŒŒ์ผ๋Ÿฌ ์ธ๊ฒƒ์ด๋‹ค. (์ปดํŒŒ์ผ์€ ์†Œ์Šค์ฝ”๋“œ๋ฅผ ๊ธฐ๊ณ„๊ฐ€ ์ดํ•ดํ•  ์ˆ˜ ์žˆ๋Š” ์ฝ”๋“œ๋กœ ๋ฐ”๊พธ๋Š” ๊ณผ์ •์ธ๋ฐ, JS์—”์ง„๋˜ํ•œ ๊ธฐ๊ณ„์ด๊ณ  ์ด๋Ÿฐ ์—”์ง„์ด ์ดํ•ดํ•  ์ˆ˜ ์žˆ๊ฒŒ ๋ฐ”๊ฟ”์ฃผ๋Š” ๊ณผ์ •์ด๊ธฐ ๋•Œ๋ฌธ์— ์ปดํŒŒ์ผ๋Ÿฌ๋ผ๊ณ  ๋ณผ ์ˆ˜ ์žˆ๋‹ค.)

์—ฌ๊ธฐ์„œ ts๋ฅผ js๋กœ ๋ณ€ํ™˜ ํ•˜๋Š” ๊ฒƒ์€ ์ดํ•ด๊ฐ€ ๋˜๋Š”๋ฐ js์—์„œ js๋กœ ๋ณ€ํ™˜ํ•˜๋Š” ์ด์œ ๊ฐ€ ๋ฌด์—‡์ด๋ƒ๊ณ  ๋ฌป๋Š”๋‹ค๋ฉด, ๊ทธ ์ด์œ ๋Š” js๋ฌธ๋ฒ•์ด ๋ณ€ํ™”ํ•˜์—ฌ ํ˜„์žฌ js๋ฌธ๋ฒ•์ด legacy๊ฐ€ ๋˜๊ฑฐ๋‚˜, ํ˜„์žฌ ๋ฌธ๋ฒ•์ด IE์™€ ๊ฐ™์€ ๋ธŒ๋ผ์šฐ์ €์—์„œ๋Š” ์ง€์›์„ ํ•˜์ง€ ์•Š๊ฑฐ๋‚˜ ์ƒˆ๋กœ์šด ๋ฌธ๋ฒ•์ด๋ผ๋ฉด, ํ•ด๋‹น ๋ธŒ๋ผ์šฐ์ €์—์„œ๋„ ๋Œ์•„๊ฐˆ ์ˆ˜ ์žˆ๊ฒŒ ์ž๋™์œผ๋กœ ๋งž๋Š” js๋ฌธ๋ฒ•์œผ๋กœ ๋ณ€ํ™˜ํ•ด์ฃผ๋Š” ๊ธฐ๋Šฅ์„ ์ˆ˜ํ–‰ํ•˜๊ธฐ ๋•Œ๋ฌธ์ด๋‹ค.

์˜ˆ๋ฅผ ๋“ค์–ด ES2020์˜ ๋ฌธ๋ฒ•์ธ ??*(nullish ๋ณ‘ํ•ฉ)*๊ธฐํ˜ธ๋ฅผ ์‚ฌ์šฉํ•œ๋‹ค๊ณ  ํ•œ๋‹ค๊ณ  ํ•˜์ž.

function greet(input) {
  return input ?? 'Hello world';
}

์œ„์˜ ์ตœ์‹  ๋ฌธ๋ฒ•์„ ํ˜„์žฌ ๋ธŒ๋ผ์šฐ์ €๊ฐ€ ์ธ์‹ํ•  ์ˆ˜ ์žˆ๊ฒŒ ์•„๋ž˜์™€ ๊ฐ™์ด ๋ฐ”๊ฟ”์ฃผ๋Š” ์—ญํ• ์„ ํ•˜๋Š” ๊ฒƒ์ด babel.

function greet( input ){
  return  input ! = null ? input : "Hello world" ;
}

์ฃผ์š” ์—ญํ• 

  • transpiler : ์œ„์—์„œ ์„ค๋ช…ํ•œ ๊ฒƒ ์ฒ˜๋Ÿผ ์ฝ”๋“œ๋ฅผ ์žฌ์ž‘์„ฑํ•ด์ฃผ๋Š” ์—ญํ• ๋กœ ์›นํŒฉ๊ณผ ๊ฐ™์€ ๋นŒ๋“œ ์‹œ์Šคํ…œ์€ ์ฝ”๋“œ๊ฐ€ ์ˆ˜์ •๋ ๋•Œ๋งˆ๋‹ค ์ž๋™์œผ๋กœ ํŠธ๋žœ์ŠคํŒŒ์ผ๋Ÿฌ๋ฅผ ๋™์ž‘์‹œ์ผœ์ค€๋‹ค.

  • polyfill : ์ƒˆ๋กญ๊ฒŒ ํ‘œ์ค€์— ์ถ”๊ฐ€๋œ ํ•จ์ˆ˜์™€ ๊ฐ™์ด ๋ณ€๊ฒฝ๋œ ํ‘œ์ค€์„ ์ค€์ˆ˜ํ•  ์ˆ˜ ์žˆ๊ฒŒ ๊ธฐ์กด ํ•จ์ˆ˜์˜ ๋™์ž‘ ๋ฐฉ์‹์„ ์ˆ˜์ •ํ•˜๊ฑฐ๋‚˜, ์ƒˆ๋กญ๊ฒŒ ๊ตฌํ˜„ํ•ด์ฃผ๋Š” ์—ญํ• . (์ด๋•Œ ์ƒˆ๋กญ๊ฒŒ ๊ตฌํ˜„ํ•œ ํ•จ์ˆ˜์˜ ์Šคํฌ๋ฆฝํŠธ๋ฅผ ํด๋ฆฌํ•„์ด๋ผ ๋ถ€๋ฅธ๋‹ค. => ๊ตฌํ˜„์ด ๋ˆ„๋ฝ๋œ ์ƒˆ๋กœ์šด ๊ธฐ๋Šฅ์„ ๋งค๊ฟ”์ฃผ๋Š” ์—ญํ• )

    core js, polyfill.io๋“ฑ์ด ์žˆ๋‹ค.


Reference

webpack

  • https://jeonghwan-kim.github.io/js/2017/05/15/webpack.html

  • https://d2.naver.com/helloworld/12864

  • https://ui.toast.com/fe-guide/ko_BUNDLER

babel

  • https://github.com/babel/babel

  • https://en.wikipedia.org/wiki/Babel_(transcompiler)

  • https://ko.javascript.info/nullish-coalescing-operator

  • https://ko.wikipedia.org/wiki/%EC%86%8C%EC%8A%A4_%EB%8C%80_%EC%86%8C%EC%8A%A4_%EC%BB%B4%ED%8C%8C%EC%9D%BC%EB%9F%AC

PreviousmoduleProjectNext์ฝ”์–ด ์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ

Last updated 3 years ago

์— ๋ณด๋ฉด ์•„๋ž˜์™€ ๊ฐ™์ด ์†Œ๊ฐœ๊ฐ€ ๋˜์–ด์žˆ๋‹ค.

์—ฌ๊ธฐ์„œ js๋Š” ์ธํ„ฐํ”„๋ฆฌํ„ฐ ์–ธ์–ด์ธ๋ฐ ์™œ ์ปดํŒŒ์ผ๋Ÿฌ๊ฐ€ ํ•„์š”ํ•˜๋ƒ๊ณ  ํ•  ์ˆ˜ ์žˆ๋Š”๋ฐ, babel์€ ์ •ํ™•ํžˆ ๋กœ ์ผ์ข…์˜ ํ˜„์žฌ js์ฝ”๋“œ๋‚˜ ts์ฝ”๋“œ๋ฅผ ์ƒˆ๋กœ์šด js์ฝ”๋“œ๋กœ ๋งŒ๋“ค์–ด๋‚ด๋Š” ๊ฒƒ.

CommonJs์™€ AMD
babel github
transfiler (์†Œ์Šค ๋Œ€ ์†Œ์Šค ์ปดํŒŒ์ผ๋Ÿฌ)
??๊ธฐํ˜ธ ์„ค๋ช… ๋ณด๊ธฐ