HTML
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.6.4/jquery.min.js"></script> <button onclick="changeBodyBackground();">버튼_1</button> <button onclick="changeBodyBackground2();">버튼_2</button>
JS
console.clear(); let isRed = false; function changeBodyBackground() { // 방식#1 if (isRed){ $('body').css('background-color','red'); isRed = false; } else{ $('body').css('background-color',''); isRed = true; } } function changeBodyBackground2() { // 방식#2 if (isRed){ $('body').css('background-color','green'); } else{ $('body').css('background-color',''); } isRed = !isRed; }
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