front_basic/10.js_operator..html at main · luail/front_basic · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>js operator</title>

    <script>
        function showBiggerNum(a,b) {
            const bigger = a > b ? a : b;
            document.getElementById("result").innerHTML=bigger;
        }

        function showComparism() {
            const a = 3;
            const b = '3';
            console.log(a==b);   //==은 값만 비교(따라서 ture)
            console.log(a===b);  //===은 타입까지 비교(따라서 false)

            const x = 'abc';
            const y = 'bcd';
            console.log(x < y);
        }
    </script>
</head>
<body>
    <h2>연산자 예시</h2>
    <button onclick="showBiggerNum(3,4)">삼항연산자 결과</button>
    <button onclick="showComparism()">숫자, 문자비교 결과</button>
    <p id="result">결과</p>

    <h2>void 연산자 활용</h2>
    <a href="" onclick="alert('안녕하세용')">클릭해주세요.</a>
    <!-- a태그를 link용도로 사용하지 않고, 아무런 동작도 없도록 세팅할 때 void사용 -->
    <a href="javascript:void(0)" >클릭해주세요2.</a>
</body>
</html>