MouseBall54

Mechanical engineering background, now working in computer vision and AI.

Recent posts

JavaScript โ€œWebSocket connection to โ€˜โ€ฆโ€™ failedโ€ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•

3 minute read

JavaScript์—์„œ WebSocket ์—ฐ๊ฒฐ ์‹คํŒจ๋Š” ๋‹ค์–‘ํ•œ ์›์ธ์œผ๋กœ ๋ฐœ์ƒํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์ด ๊ธ€์—์„œ๋Š” โ€œWebSocket connection to โ€˜โ€ฆโ€™ failedโ€ ์˜ค๋ฅ˜์˜ ์ผ๋ฐ˜์ ์ธ ์›์ธ๊ณผ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•์„ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.

์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ Uncaught (in promise) ์˜ค๋ฅ˜ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•

2 minute read

์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ์—์„œ ํ”„๋กœ๋ฏธ์Šค(Promise) ์ฒด์ธ์—์„œ ๋ฐœ์ƒํ•œ ์˜ˆ์™ธ๊ฐ€ ์ฒ˜๋ฆฌ๋˜์ง€ ์•Š์•˜์„ ๋•Œ ๋‚˜ํƒ€๋‚˜๋Š” Uncaught (in promise) ์˜ค๋ฅ˜์˜ ์›์ธ๊ณผ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•์„ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.

JavaScript์—์„œ โ€œthis is undefinedโ€ ๋ฌธ์ œ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•

2 minute read

JavaScript์—์„œ โ€˜thisโ€™๋Š” ํ˜ธ์ถœ ์ปจํ…์ŠคํŠธ์— ๋”ฐ๋ผ ๋™์ ์œผ๋กœ ๊ฒฐ์ •๋ฉ๋‹ˆ๋‹ค. ์ด๋กœ ์ธํ•ด ์ฝœ๋ฐฑ ํ•จ์ˆ˜๋‚˜ ์ด๋ฒคํŠธ ํ•ธ๋“ค๋Ÿฌ์—์„œ โ€˜thisโ€™๊ฐ€ undefined๊ฐ€ ๋˜๋Š” ๋ฌธ์ œ๊ฐ€ ์ž์ฃผ ๋ฐœ์ƒํ•ฉ๋‹ˆ๋‹ค. ์ด ๊ธ€์—์„œ๋Š” ์›์ธ๊ณผ ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•์„ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.

์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ SyntaxError: Unexpected end of input ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•

2 minute read

์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ ์ฝ”๋“œ๋ฅผ ํŒŒ์‹ฑํ•˜๋Š” ๋™์•ˆ ์—”์ง„์ด ์ฝ”๋“œ ๋ธ”๋ก์˜ ๋์„ ์˜ˆ์ƒ์น˜ ๋ชปํ•˜๊ฒŒ ๋งŒ๋‚ฌ์„ ๋•Œ ๋ฐœ์ƒํ•˜๋Š” SyntaxError: Unexpected end of input ์˜ค๋ฅ˜์˜ ์ผ๋ฐ˜์ ์ธ ์›์ธ๊ณผ ํ•ด๊ฒฐ์ฑ…์„ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.

์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ SyntaxError: missing ) after argument list ํ•ด๊ฒฐ ๋ฐฉ๋ฒ•

2 minute read

์ž๋ฐ”์Šคํฌ๋ฆฝํŠธ์—์„œ ํ•จ์ˆ˜๋ฅผ ํ˜ธ์ถœํ•  ๋•Œ ์ธ์ž ๋ชฉ๋ก ๋’ค์— ๋‹ซ๋Š” ๊ด„ํ˜ธ )๋ฅผ ๋น ๋œจ๋ ค ๋ฐœ์ƒํ•˜๋Š” SyntaxError: missing ) after argument list ์˜ค๋ฅ˜์˜ ์›์ธ๊ณผ ํ•ด๊ฒฐ์ฑ…์„ ์•Œ์•„๋ด…๋‹ˆ๋‹ค.