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๐Ÿ™‡โ€โ™‚๏ธ์‹ ์ดŒ์—ฐํ•ฉ์ฐฝ์—…๋™์•„๋ฆฌ CEOS ์Šคํ„ฐ๋””๋ฅผ ํ†ตํ•ด ๋ฐฐ์šด ๊ธฐ๋ก๋“ค

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๐Ÿ™Thanks_to_CEOS

License: MIT

CEOS 12th Front-End developer MoonSangJin

  • CEOS์—์„œ ์Šคํ„ฐ๋”” ๋ฐ ๋ฏธ์…˜ ์ˆ˜ํ–‰ํ–ˆ๋˜ ๊ธฐ๋ก๋“ค์ž…๋‹ˆ๋‹ค.

Author

๐Ÿ‘ค MoonSangJin



๐Ÿ“CEOS Front-end 1์ฃผ์ฐจ ๋ฏธ์…˜: Vanilla-Todo

๋ฏธ์…˜ ๋ชฉํ‘œ


  • VSCode, Prettier๋ฅผ ์ด์šฉํ•˜์—ฌ ๊ฐœ๋ฐœํ™˜๊ฒฝ์„ ๊ด€๋ฆฌํ•ฉ๋‹ˆ๋‹ค.
  • HTML/CSS์˜ ๊ธฐ์ดˆ๋ฅผ ์ดํ•ดํ•ฉ๋‹ˆ๋‹ค.
  • JavaScript๋ฅผ ์ด์šฉํ•œ DOM ์กฐ์ž‘์„ ์ดํ•ดํ•ฉ๋‹ˆ๋‹ค.
  • Vanilla.js๋ฅผ ์ด์šฉํ•œ ์–ดํ”Œ๋ฆฌ์ผ€์ด์…˜ ์ƒํƒœ ๊ด€๋ฆฌ ๋ฐฉ๋ฒ•์„ ์ดํ•ดํ•ฉ๋‹ˆ๋‹ค.

๊ฒฐ๊ณผ ํ™”๋ฉด

image

Key Questions


  • DOM์€ ๋ฌด์—‡์ธ๊ฐ€์š”?
  • HTML (tag) Element๋ฅผ JavaScript๋กœ ์ƒ์„ฑํ•˜๋Š” ๋ฐฉ๋ฒ•์€ ์–ด๋–ค ๊ฒƒ์ด ์žˆ๊ณ , ์–ด๋–ค ๋ฐฉ๋ฒ•์ด ๊ฐ€์žฅ ์ ํ•ฉํ• ๊นŒ์š”?
  • DOM์—์„œ ๋ฐœ์ƒํ•˜๋Š” Event๋Š” ๋ฐฉ๋ฒ•์—๋Š” ์–ด๋–ค ๊ฒƒ์ด ์žˆ๊ณ , ์–ด๋–ค ๋ฐฉ๋ฒ•์ด ๊ฐ€์žฅ ์ ํ•ฉํ• ๊นŒ์š”?
  • Flexbox Layout์€ ๋ฌด์—‡์ด๋ฉฐ, ์–ด๋–ป๊ฒŒ ์‚ฌ์šฉํ•˜๋‚˜์š”?
  • JavaScript๊ฐ€ ๋‹ค๋ฅธ ์–ธ์–ด๋“ค์— ๋น„ํ•ด ์ฃผ๋ชฉํ• ๋งŒํ•œ ์ ์—๋Š” ์–ด๋–ค ๊ฒƒ๋“ค์ด ์žˆ๋‚˜์š”?
  • ์ฝ”๋“œ์˜ ์ถ”์ƒํ™” ์ˆ˜์ค€์ด๋ž€ ๋ฌด์—‡์ธ๊ฐ€์š”?
  • ์ฝ”๋“œ์—์„œ ์ฃผ์„์„ ๋‹ค๋Š” ๋ฐ”๋žŒ์งํ•œ ๋ฐฉ๋ฒ•์€ ๋ฌด์—‡์ผ๊นŒ์š”?

Key Quenstions Answer

์ถ”๊ฐ€ ์ž‘์—…


  • ๋ธŒ๋ผ์šฐ์ €์˜ localStorage ์ด์šฉํ•˜์—ฌ ๋‹ค์Œ ๋ฒˆ ์ ‘์† ์‹œ์— ๊ธฐ์กด ํˆฌ๋‘ ๋ฐ์ดํ„ฐ๋ฅผ ๋ถˆ๋Ÿฌ์™€๋ณด์•˜๋‹ค.

๊ณต๋ถ€ ๋ฐ ์ฐธ๊ณ ํ•œ ์ž๋ฃŒ





๐Ÿ’ŒCEOS Front-end 2-3์ฃผ์ฐจ ๋ฏธ์…˜: React-Messenger

๋ฏธ์…˜๋ชฉํ‘œ


  • React์˜ ๊ธฐ์ดˆ๋ฅผ ์ดํ•ดํ•œ๋‹ค.
  • useState๋กœ ์ปดํฌ๋„ŒํŠธ์˜ ์ƒํƒœ๋ฅผ ๊ด€๋ฆฌํ•  ์ˆ˜ ์žˆ๊ฒŒ๋œ๋‹ค.
  • useEffect์˜ ์‚ฌ์šฉ๋ฒ•์„ ์ดํ•ดํ•œ๋‹ค.

๊ฒฐ๊ณผํ™”๋ฉด

image

Key Questions?


  • Virtual DOM์ด ๋ฌด์—‡์ผ๊นŒ์š”?
  • ๋ฏธ์…˜์„ ์ง„ํ–‰ํ•˜๋ฉด์„œ ๋Š๋‚€, ๋ฆฌ์•กํŠธ๋ฅผ ์‚ฌ์šฉํ•˜๋Š” ์žฅ์ ์ด ์žˆ์—ˆ๋‹ค๋ฉด?
  • ๋ฆฌ์•กํŠธ์—์„œ๋Š” ์ƒํƒœ๋ฅผ ์–ด๋–ป๊ฒŒ ๊ด€๋ฆฌํ• ๊นŒ์š”?
  • styled-components ์‚ฌ์šฉํ›„๊ธฐ (CSS์™€ ๋น„๊ต)

Key Question Answer

๊ตฌํ˜„์‹œ ๊ณ ๋ คํ•œ ์š”๊ฑด


  • ํ•จ์ˆ˜ํ˜• ์ปดํฌ๋„ŒํŠธ๋ฅผ ์‚ฌ์šฉํ•œ๋‹ค.

  • styled-component๋ฅผ ์ด์šฉํ•˜์—ฌ ์Šคํƒ€์ผ๋ง ํ•œ๋‹ค.

  • ์ƒ๋‹จ๋ฐ”์— ๋ฉ”์‹œ์ง€๋ฅผ ๋ณด๋‚ด๋Š” ์‚ฌ๋žŒ์˜ ํ”„๋กœํ•„์„ ๋„์šด๋‹ค. + ์ƒ๋‹จ๋ฐ”์˜ ํ”„๋กœํ•„๋กœ ๋ฉ”์‹œ์ง€ ๋ฐœ์‹ ์ž๋ฅผ ๋ฐ”๊ฟ€ ์ˆ˜ ์žˆ๊ฒŒ ํ•œ๋‹ค.

    (user: true๋Š” ์€, user:false๋Š” ์‹œ์›์œผ๋กœ ๊ณ ์ •๋จ)

  • ๊ณต๋ฐฑ๋ฉ”์‹œ์ง€๋Š” ์ž…๋ ฅ๋˜์ง€ ์•Š๋„๋ก ํ•ธ๋“ค๋ง ํ•œ๋‹ค. + alert ๋ฉ”์„ธ์ง€ ๋„์šฐ๊ธฐ

  • ๋ฉ”์‹œ์ง€ ์ „์†กํ›„ ์ž…๋ ฅ์นธ์„ ๋น„์›Œ์ค€๋‹ค.

  • ๋ฉ”์‹œ์ง€ ์ „์†กํ›„ ์Šคํฌ๋กค์„ ๋ฐ‘์œผ๋กœ ๋‚ด๋ ค์ค€๋‹ค. (Hint : useEffect + scrollBy ์ด์šฉ)

  • ์ปดํฌ๋„ŒํŠธ ์ด๋ฆ„์„ ์—ญํ• ์ด ์ž˜ ๋“œ๋Ÿฌ๋‚˜๊ฒŒ ์ง“๋Š”๋‹ค.

๊ณต๋ถ€ ๋ฐ ์ฐธ๊ณ ํ•œ ์ž๋ฃŒ





๐Ÿ‘CEOS Front-end 4~5์ฃผ์ฐจ ๋ฏธ์…˜: React-Vote

๋ฏธ์…˜๋ชฉํ‘œ



๊ฒฐ๊ณผํ™”๋ฉด

image

Key Questions?


  • ์›น์—์„œ ์‚ฌ์šฉ๋˜๋Š” ์ธ์ฆ ๋ฐฉ๋ฒ•์ธ Cookie, Session, JWT ์ธ์ฆ ๋ฐฉ์‹์€ ๊ฐ๊ฐ ๋ฌด์—‡์ธ๊ฐ€์š”?
  • JWT๋ฅผ ์ด์šฉํ•˜์—ฌ ์‚ฌ์šฉ์ž๋ฅผ ์ธ์ฆํ•˜๋Š” ์›๋ฆฌ๋Š” ๋ฌด์—‡์ธ๊ฐ€์š”?
  • JWT Token์€ ์–ด๋””์— ์ €์žฅํ•˜๋Š” ๊ฒƒ์ด ๊ฐ€์žฅ ์•ˆ์ „ํ•˜๊ณ , ๊ทธ ์ด์œ ๋Š” ๋ฌด์—‡์ผ๊นŒ์š”?
  • CORS ์ •์ฑ…๊ณผ CORS ๋ฌธ์ œ๋Š” ๋ฌด์—‡์ธ๊ฐ€์š”?

Key Question Answer

๊ณต๋ถ€ ๋ฐ ์ฐธ๊ณ ํ•œ ์ž๋ฃŒ





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๐Ÿ™‡โ€โ™‚๏ธ์‹ ์ดŒ์—ฐํ•ฉ์ฐฝ์—…๋™์•„๋ฆฌ CEOS ์Šคํ„ฐ๋””๋ฅผ ํ†ตํ•ด ๋ฐฐ์šด ๊ธฐ๋ก๋“ค

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