04/26 22차 자바스크립트 과제

Noh Sinyoung·2023년 4월 26일
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과제

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22/27
<!DOCTYPE html>
<html lang="ko">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <h1>단위 변환</h1>
    <p>cm을 선택한 단위로 변환합니다</p>

    <label for=""><input type="text" class="input"> cm</label>

    <p>↓ ↓ ↓ ↓ ↓ 변환 ↓ ↓ ↓ ↓ ↓</p>

    <div class="box" style="border: 1px solid black; width:170px; height:20px; float:left;"></div>
    <select name="" id="" style="margin-left: 8px; clear:both;">
        <option value="mm">mm</option>
        <option value="inch">inch</option>
        <option value="m">m</option>
    </select>

    <script>
        let 입력 = document.querySelector("input")
        let 결과 = document.querySelector(".box")
        
        let 셀렉 = document.querySelector("select")
        셀렉.addEventListener("change", () => {
            if (셀렉.value == "mm") {
                결과.textContent = 입력.value * 10
            }
            else if (셀렉.value == "inch") {
                결과.textContent = 입력.value / 2.5
            }
            else if (셀렉.value == "m") {
                결과.textContent = 입력.value / 100
            }
        })

    </script>

</body>
</html>

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