์—ด์„ธ ๋ฒˆ์งธ ๋ฌธ์ œ: Promise๋ฅผ ์‚ฌ์šฉํ•œ ๋น„๋™๊ธฐ ์ฒด์ด๋‹ (JS ๊ฐœ๋… ์‹ฌํ™” 2)

2025. 10. 31. 17:40ยทw. Gemini

์š”๊ตฌ์‚ฌํ•ญ ๋ฐ ํžŒํŠธ

  1. Promise ๋ฐ˜ํ™˜ ํ•จ์ˆ˜ ์ •์˜:
    • delayLog๋ผ๋Š” ํ•จ์ˆ˜๋ฅผ ์ •์˜ํ•ฉ๋‹ˆ๋‹ค. ์ด ํ•จ์ˆ˜๋Š” message์™€ delayTime์„ ์ธ์ˆ˜๋กœ ๋ฐ›์Šต๋‹ˆ๋‹ค.
    • ์ด ํ•จ์ˆ˜๋Š” ์ฆ‰์‹œ ์ƒˆ๋กœ์šด Promise ๊ฐ์ฒด๋ฅผ ๋ฐ˜ํ™˜ํ•ด์•ผ ํ•ฉ๋‹ˆ๋‹ค. (ํžŒํŠธ: return new Promise((resolve, reject) => { ... }))
  2. ๋น„๋™๊ธฐ ์ž‘์—… ๋ฐ ์„ฑ๊ณต:
    • Promise ์ƒ์„ฑ์ž ๋‚ด๋ถ€์—์„œ setTimeout์„ ์‚ฌ์šฉํ•˜์—ฌ delayTime ํ›„์— ์‹คํ–‰๋˜๋„๋ก ํ•ฉ๋‹ˆ๋‹ค.
    • ํƒ€์ด๋จธ๊ฐ€ ๋งŒ๋ฃŒ๋˜๋ฉด, Promise๋ฅผ ์„ฑ๊ณต ์ƒํƒœ๋กœ ๋งŒ๋“ญ๋‹ˆ๋‹ค. (ํžŒํŠธ: resolve(message) ํ˜ธ์ถœ)
  3. Promise ์ฒด์ด๋‹:
    • delayLog ํ•จ์ˆ˜๋ฅผ ๋‘ ๋ฒˆ ์—ฐ์†์œผ๋กœ ํ˜ธ์ถœํ•˜๊ณ  **.then()**์œผ๋กœ ์—ฐ๊ฒฐํ•˜์—ฌ, ์ฒซ ๋ฒˆ์งธ ์ž‘์—…์ด ์™„๋ฃŒ๋œ ํ›„ ๋‘ ๋ฒˆ์งธ ์ž‘์—…์ด ์‹คํ–‰๋˜๋„๋ก ์ˆœ์„œ๋ฅผ ๋ณด์žฅํ•ฉ๋‹ˆ๋‹ค.
      • ์ฒซ ๋ฒˆ์งธ: "์ฒซ ๋ฒˆ์งธ ์ž‘์—… ์™„๋ฃŒ!" ๋ฉ”์‹œ์ง€, 1000ms ์ง€์—ฐ.
      • ๋‘ ๋ฒˆ์งธ: "๋‘ ๋ฒˆ์งธ ์ž‘์—…๋„ ์™„๋ฃŒ!" ๋ฉ”์‹œ์ง€, 1500ms ์ง€์—ฐ.
  4. ์ตœ์ข… ์™„๋ฃŒ:
    • ๋งˆ์ง€๋ง‰ .then()์—์„œ๋Š” "๋ชจ๋“  ๋น„๋™๊ธฐ ์ž‘์—… ์ข…๋ฃŒ."๋ฅผ ์ฝ˜์†”์— ์ถœ๋ ฅํ•ฉ๋‹ˆ๋‹ค.
๋”๋ณด๊ธฐ
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function delayLog(message,delayTime) {
            return new Promise((resolve, reject) => {
                setTimeout(() => {
                    resolve(message);
                }, delayTime);
            })
        }

        console.log("์ž‘์—… ์‹œ์ž‘.....");
        delayLog("์ฒซ ๋ฒˆ์งธ ์ž‘์—… ์™„๋ฃŒ!",1000)
            .then((result1) => {
                console.log(result1);
                return delayLog("๋‘๋ฒˆ์งธ ์ž‘์—…๋„ ์™„๋ฃŒ!", 1500);
            })
            .then((result2) => {
                console.log(result2);
                console.log("๋ชจ๋“  ๋น„๋™๊ธฐ ์ž‘์—… ์ข…๋ฃŒ.");
            })
    </script>
</body>
</html>
์ €์ž‘์žํ‘œ์‹œ ๋น„์˜๋ฆฌ ๋™์ผ์กฐ๊ฑด (์ƒˆ์ฐฝ์—ด๋ฆผ)

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'w. Gemini' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๋‹ค๋ฅธ ๊ธ€
  • 4xx ๋น„์œจ ์ƒ์Šน ๋ฐ ํŠธ๋ž˜ํ”ฝ ๊ธ‰์ฆ ๋ถ„์„
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  • ์—ด๋‘ ๋ฒˆ์งธ ๋ฌธ์ œ: ๋น„๋™๊ธฐ ์ž‘์—… ์‹œ๋ฎฌ๋ ˆ์ด์…˜ ๋ฐ ์ฝœ๋ฐฑ ํ•จ์ˆ˜ ์ดํ•ด
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๋น™๊ณ ๊ตฌ๋ง›ํƒ•
์—ด์„ธ ๋ฒˆ์งธ ๋ฌธ์ œ: Promise๋ฅผ ์‚ฌ์šฉํ•œ ๋น„๋™๊ธฐ ์ฒด์ด๋‹ (JS ๊ฐœ๋… ์‹ฌํ™” 2)
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