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Scope1

JS_๋ฌธ๋ฒ• (4)_Scope JS์˜ Scope์— ๋Œ€ํ•ด์„œ ์•Œ์•„๋ณด์ž! 3๊ฐ€์ง€ ์ข…๋ฅ˜๊ฐ€ ์žˆ๋Š”๋ฐ ๋‹ค์Œ๊ณผ ๊ฐ™๋‹ค. 1. ์ „์—ญ (Global) scope : ์ฝ”๋“œ ์ „์ฒด ๋ฒ”์œ„ 2. ํ•จ์ˆ˜ (Function) scope : ํ•จ์ˆ˜ ๋‚ด์—์„œ์˜ ๋ฒ”์œ„ 3. ๋ธ”๋ก (Block) scope : { } ์ค‘๊ด„ํ˜ธ๋กœ ์ด๋ค„์ง„ ๋ธ”๋ก ๋‚ด์—์„œ์˜ ๋ฒ”์œ„ ๋‹ค๋ฅธ ์–ธ์–ด์™€ ๋‹ฌ๋ฆฌ ๋ธ”๋ก scope๊ฐ€ ์žˆ๋‹ค! ์ „์—ญ scope ์™ธ๋ถ€์—์„œ ์„ ์–ธ๋œ ๋ณ€์ˆ˜orํ•จ์ˆ˜ ๋ชจ๋“  ์ฝ”๋“œ์—์„œ ์‚ฌ์šฉ์ด ๊ฐ€๋Šฅํ•˜๋‹ค. ์ด๋•Œ ๋ธ”๋ก๊นŒ์ง€๋„ ์ ์šฉ์ด ๊ฐ€๋Šฅํ•˜๋‹ค. let a = 1; { console.log(a) } console.log(a) >>> 1 //๋ธ”๋ก ์•ˆ์—์„œ ์ถœ๋ ฅ 1 //๋ธ”๋ก ๋ฐ–์—์„œ ์ถœ๋ ฅ ์ „์—ญ๋ณ€์ˆ˜๋Š” ๋ธ”๋ก ์•ˆ์˜ ๋ธ”๋ก๊นŒ์ง€๋„ ์ ์šฉ์ด ๋œ๋‹ค. let a = 1; { let b = 2; console.log(a) { console.log(a.. 2022. 2. 17.
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