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[๐Ÿš€ Today I Learn ํŽ˜์ด์ง€ ๋งŒ๋“ค๊ธฐ] ์•ˆํ†จ๋ฆฌ๋‹ˆ ๋ฏธ์…˜ ์ œ์ถœํ•ฉ๋‹ˆ๋‹ค.#118

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[๐Ÿš€ Today I Learn ํŽ˜์ด์ง€ ๋งŒ๋“ค๊ธฐ] ์•ˆํ†จ๋ฆฌ๋‹ˆ ๋ฏธ์…˜ ์ œ์ถœํ•ฉ๋‹ˆ๋‹ค.#118
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๋ฐฐํฌ ๋งํฌ

https://antoliny0919.github.io/web-today-i-learn/

์ƒ๊ฐํ•ด๋ณด๊ธฐ

HTML

Q. ๋‚˜๋งŒ์˜ ๊ฐค๋Ÿฌ๋ฆฌ์—์„œ ์‚ฌ์ง„ 9์žฅ์€ HTML ํƒœ๊ทธ ์ค‘ ์–ด๋–ค ์š”์†Œ๋กœ ํ‘œํ˜„ํ•˜๋Š” ๊ฒƒ์ด ์ข‹์„๊นŒ? ์ด์œ ๋Š”?
A. <figuare> + <img> ์กฐํ•ฉ์„ ์‚ฌ์šฉํ•˜๋ฉด ์ ์ ˆํ• ๊ฑฐ ๊ฐ™๋‹ค. img๋ฅผ ๋ Œ๋”๋งํ•˜๊ธฐ ์œ„ํ•ด์„œ ์‚ฌ์šฉํ•ด์•ผํ•  imgํƒœ๊ทธ์™€ imgํƒœ๊ทธ๋“ค์„ ๋ฌถ์–ด์„œ ์„ค๋ช…ํ•ด์ฃผ๋Š” figure๋ฅผ ์‚ฌ์šฉํ•˜๋ฉด ์ ‘๊ทผ์„ฑ์ ์ธ ์ธก๋ฉด์—์„œ ๋” ์ข‹๋‹ค.

Q. ๋ผˆ๋Œ€ ์ฝ”๋“œ๋ฅผ ๊ธฐ๋ฐ˜์œผ๋กœ ์ด๋ฏธ์ง€๋ฅผ ๋กœ๋“œํ•˜๋Š” ๋ฐฉ์‹ 2๊ฐ€์ง€๋Š” ๋ฌด์—‡์ด๊ณ , ์–ด๋–ป๊ฒŒ ์‚ฌ์šฉํ–ˆ๋Š”๊ฐ€?
A. , css background-image
img๋Š” ์ฝ˜ํ…์ธ ๋กœ์„œ์˜ ์˜๋ฏธ, background-image๋Š” ๊พธ๋ฏธ๋Š”๊ฑธ ๋ชฉ์ ์œผ๋กœ ์‚ฌ์šฉํ•˜๋Š” ์ด๋ฏธ์ง€

Q. ์‹œ๋งจํ‹ฑ ํƒœ๊ทธ(header, main, section, footer ๋“ฑ)๋กœ ๋ฌธ์„œ๋ฅผ ๊ตฌ๋ถ„ํ•  ๋•Œ ๊ธฐ์ค€์€?
A. ๋‚ด์šฉ์˜ ์—ญํ• ๊ณผ ์˜๋ฏธ๋ฅผ ๊ธฐ์ค€์œผ๋กœ ๋‚˜๋ˆˆ๋‹ค.

Q. img ํƒœ๊ทธ์˜ [alt]๋Š” ์™œ ํ•„์š”ํ•˜๋ฉฐ ์–ด๋–ป๊ฒŒ ์ž‘์„ฑํ•˜๋Š” ๊ฒƒ์ด ์ข‹์€๊ฐ€?
A. ์ด๋ฏธ์ง€๊ฐ€ ๋กœ๋“œ๋˜์ง€ ์•Š์•˜์„๋•Œ ๋Œ€์ฒด ํ…์ŠคํŠธ๋ฅผ ์ œ๊ณตํ•˜์—ฌ ์‹œ๊ฐ์ ์ธ ์‚ฌ์šฉ์ž์—๊ฒŒ ํ•ด๋‹น ์ด๋ฏธ์ง€๊ฐ€ ์–ด๋–ค ๊ฒƒ์ธ์ง€์— ๋Œ€ํ•ด ํŒŒ์•…ํ•˜๊ฒŒ ํ•œ๋‹ค.
์Šคํฌ๋ฆฐ๋ฆฌ๋” ์‚ฌ์šฉ์ž์˜ ๊ฒฝ์šฐ์—๋Š” ์ด๋ฏธ์ง€๋ฅผ ๋ณผ ์ˆ˜ ์—†๊ธฐ ๋•Œ๋ฌธ์— alt์— ์˜ํ•ด ์ด๋ฏธ์ง€์— ๋Œ€ํ•ด ํŒŒ์•…ํ•˜๊ฒŒ ๋œ๋‹ค.

Q. ์ƒ๋Œ€ ๊ฒฝ๋กœ์™€ ์ ˆ๋Œ€ ๊ฒฝ๋กœ๋ฅผ ํ˜ผ์šฉํ•˜๋ฉด ์–ด๋–ค ๋ฌธ์ œ๊ฐ€ ์ƒ๊ธฐ๋Š”๊ฐ€?
A. ๋ฐฐํฌํ›„์—๋Š” ๊ฒฝ๋กœ๋ฅผ ๋ชป์ฐพ์„ ์ˆ˜ ์žˆ๋‹ค.

Q. meta์˜ viewport์™€ Open Graph ํƒœ๊ทธ๋Š” ๊ฐ๊ฐ ์–ด๋–ค ์—ญํ• ์ธ๊ฐ€?
A. ๋ชจ๋ฐ”์ผ ๋ธŒ๋ผ์šฐ์ €์—๊ฒŒ ํ™”๋ฉด ๋„ˆ๋น„์™€ ์ดˆ๊ธฐ ์คŒ ๋ ˆ๋ฒจ์„ ์•Œ๋ ค์ค€๋‹ค -> viewport
SNS๋‚˜ ๋ฉ”์‹ ์ €์—์„œ ๋งํฌ๋ฅผ ๊ณต์œ ํ•  ๋•Œ ๋ฏธ๋ฆฌ๋ณด๊ธฐ ์นด๋“œ๊ฐ€ ์–ด๋–ป๊ฒŒ ๋ณด์ผ์ง€ ์ •์˜ -> Open Graph

CSS

Q. ๊ฐค๋Ÿฌ๋ฆฌ 9์žฅ์„ ๋ฐฐ์น˜ํ•  ๋•Œ Flexbox์™€ Grid ์ค‘ ๋ฌด์—‡์ด ๋” ์ ํ•ฉํ•œ๊ฐ€? ์ด์œ ๋Š”?
A. grid๊ฐ€ ๋” ์ ํ•ฉํ•˜๋‹ค.
flex์˜ ๊ฒฝ์šฐ์—๋Š” 1์ฐจ์›์ ์ธ ๋ ˆ์ด์•„์›ƒ์— ์œ ์šฉํ•˜๊ณ  ํ˜„์žฌ์™€ ๊ฐ™์ด ๊ฐค๋Ÿฌ๋ฆฌ์ฒ˜๋Ÿผ 3 * 3 ๋ ˆ์ด์•„์›ƒ์—๋Š” grid-template-column์„ ํ†ตํ•ด ์‰ฝ๊ฒŒ ํ•ด๊ฒฐํ•  ์ˆ˜ ์žˆ๋‹ค.

Q. ํƒœ๊ทธ/ํด๋ž˜์Šค/ID ์„ ํƒ์ž๋Š” ๊ฐ๊ฐ ์–ธ์ œ ์“ฐ๋Š”๊ฐ€?
A. ํƒœ๊ทธ ๋Š” ํ•ด๋‹น ํƒœ๊ทธ ์ „์ฒด์— ๊ณตํ†ต ์Šคํƒ€์ผ์„ ์ค„ ๋•Œ, ํด๋ž˜์Šค๋Š” ์—ฌ๋Ÿฌ ์š”์†Œ์— ๋ฐ˜๋ณต์ ์œผ๋กœ ์ ์šฉํ•  ์Šคํƒ€์ผ์—, ID๋Š” ํŽ˜์ด์ง€์—์„œ ๋‹จ ํ•˜๋‚˜๋ฟ์ธ ์š”์†Œ๋ฅผ ํŠน์ •ํ•  ๋•Œ ์“ด๋‹ค.

Q. CSS๋ฅผ HTML์— ์ง์ ‘ ์“ฐ๋Š” ๊ฒƒ๊ณผ ํŒŒ์ผ ๋ถ„๋ฆฌ์˜ ์ฐจ์ด๋Š”?
A. ๋‚ด๋ถ€์— ์“ธ๋•Œ๋Š” ํ…Œ์ŠคํŠธํ•˜๊ธฐ๋Š” ํŽธํ•˜์ง€๋งŒ ๋ถ„๋ฆฌํ•˜๋ฉด ์—ฌ๋Ÿฌ ํŒŒ์ผ์—์„œ CSS๋ฅผ ๊ณต์œ ํ•  ์ˆ˜ ์žˆ๋‹ค.

JavaScript

Q. getElementById()์™€ querySelector()์˜ ์ฐจ์ด๋Š”?
A. ID๋ฅผ ํ†ตํ•ด ํŠน์ • dom์„ ์ ‘๊ทผ ํ•˜๋ ค๊ณ  ํ• ๋•Œ , querySelector์˜ ๊ฒฝ์šฐ์—๋Š” CSS ์„ ํƒ์ž ๋ฌธ๋ฒ•์„ ํ†ตํ•ด ๋” ์ž์œ ๋กญ๊ฒŒ DOM์— ์ ‘๊ทผ ํ•  ์ˆ˜ ์žˆ๋‹ค.

Q. ์ž๊ธฐ์†Œ๊ฐœ ํŽ˜์ด์ง€์—์„œ ์ด๋ฒคํŠธ ๋ฆฌ์Šค๋„ˆ๋กœ ํ™œ์šฉ ๊ฐ€๋Šฅํ•œ ์ด๋ฒคํŠธ๋Š”?
A. click, mouseover, mouseout ๊ณผ ๊ฐ™์€ ๊ธฐ๋ณธ์ ์ธ ์ด๋ฒคํŠธ

Q. innerHTML๋กœ DOM ์กฐ์ž‘ ์‹œ ์ฃผ์˜ํ•  ์ ์€?
A. XSS ๊ณต๊ฒฉ์— ์ฃผ์˜ํ•ด์•ผ ํ•œ๋‹ค.

๋ฐฐํฌ

Q. GitHub Pages ๋ฐฐํฌ ํŽ˜์ด์ง€์—์„œ TIL ์ž‘์„ฑ ๋ฐ์ดํ„ฐ๋Š” ์ƒˆ๋กœ๊ณ ์นจ/์žฌ๋ฐฐํฌ ํ›„ ์œ ์ง€๋˜๋Š”๊ฐ€?
A. ์œ ์ง€๋˜์ง€ ์•Š๋Š”๋‹ค. JavaScript๋กœ ์ถ”๊ฐ€ํ•œ ๋ฐ์ดํ„ฐ๋Š” ๋ธŒ๋ผ์šฐ์ € ๋ฉ”๋ชจ๋ฆฌ์—๋งŒ ์กด์žฌํ•˜๊ธฐ ๋•Œ๋ฌธ์— ์ƒˆ๋กœ๊ณ ์นจํ•˜๋ฉด ์ดˆ๊ธฐํ™”๋œ๋‹ค.

Q. JavaScript๋กœ ์ถ”๊ฐ€ํ•œ ๋ฐ์ดํ„ฐ๋ฅผ ์˜๊ตฌ ์ €์žฅํ•˜๋ ค๋ฉด?
A. ํด๋ผ์ด์–ธํŠธ ์ธก์—์„œ ์œ ์ง€ํ•˜๋ ค๋ฉด localStorage๋ฅผ ์‚ฌ์šฉํ•  ์ˆ˜ ์žˆ์„๊ฑฐ ๊ฐ™๋‹ค. ์˜๊ตฌ์ ์œผ๋กœ ์ €์žฅํ•˜๋ ค๋ฉด ๋ฐฑ์—”๋“œ, DB๊ฐ€ ํ•„์š”ํ• ๊ฑฐ ๊ฐ™๋‹ค.

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