HTML/220713.html at main · awj1052/HTML · GitHub

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<!DOCTYPE html>
<html>
    <head>
        <style>
            *{
                padding: 0;
                margin: 0;
            }
            body{

                height: 100vh;
                display: grid;
                place-items: center;
                background: lightgrey;
            }
            .score{
                text-align: center;
                text-size: 70px;
            }
            .circle{
                height: 400px;
                width: 400px;
                border-radius: 50%;
                background: #c51212cc;
            }
            .start{
                text-size: 70px;
                text-align: center;
            }
        </style>
    </head>
    <body ondragstart="return false" onselectstart="return false" oncontextmenu="return false">
        <div class="score">0 ms</div>
        <div class="circle"></div>
        <div class="start">START</div>
        <script>
            const score = document.querySelector(".score");
            const circle = document.querySelector(".circle");
            const btn = document.querySelector(".start");

            circle.addEventListener("click", click);
            btn.addEventListener("click", start);

            var time;
            var flag = false;
            var timeout;

            function click(){
                if(flag){
                    flag=false;
                    score.innerText = new Date().getTime() - time + " ms";
                    circle.style.background = "#c51212cc";
                }else if(btn.style.visibility == "hidden"){
                    alert("너무 빠릅니다!");
                    clearTimeout(timeout);
                }
                btn.style.visibility = "visible";
            }

            function start(){
                btn.style.visibility = "hidden";
                clearTimeout(timeout);
                const ran = 2000 + Math.floor(Math.random()*16)*100;
                timeout = setTimeout(() => {
                    flag=true;
                    circle.style.background = "#12c512cc";
                    time = new Date().getTime();
                }, ran);
            }


        </script>
    </body>
</html>