倒计时

            
            * {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

section {
  height: 100vh;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
h1 {
  font-family: "Montserrat";
  font-size: 90px;
}

* {
  box-sizing: border-box;
}
body {
  overflow-x: hidden;
}
.float-text {
  display: inline-block;
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: fit-content;
  background-color: #192227;
  color: whitesmoke;
  font-family: "Montserrat";
  text-transform: capitalize;
  font-size: 15px;
  padding: 10px 20px;
  border-radius: 4px;
  box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.226);
  cursor: pointer;
  border: 1px solid white;
}
.float-card-info {
  width: 300px;
  position: absolute;
  background-color: #263238;
  border: 2px solid white;
  overflow: hidden;
  bottom: 5px;
  right: -100%;
  padding: 30px;
  border-radius: 8px;
  transition: 0.5s ease-in-out right;
}
.float-card-info p {
  color: white;
  font-size: 20px;
  font-family: "Montserrat";
  text-transform: capitalize;
  width: 100%;
  font-weight: 500;
  text-align: center;
  margin-bottom: 20px;
}
.gg-youtube {
  --ggs: 1.5;
}
.float-card-info .icons {
  width: 120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-direction: row;
  margin-bottom: 20px;
}
.float-card-info .icons a {
  display: inline-block;
  cursor: pointer;
  color: whitesmoke;
}
.float-card-info .icons a:hover {
  color: rgb(127, 127, 129);
}
.float-card-info .link {
  width: 100%;
  display: block;
  text-decoration: none;
  color: whitesmoke;
  font-family: "Montserrat";
  font-size: 14px;
  text-align: center;
  margin-top: 5px;
}
.gg-close-r {
  position: absolute;
  top: 10px;
  right: 10px;
  cursor: pointer;
}
.float-card-info.active {
  right: 5px;
  bottom: 5px;
}

.float-card-info .hire {
  background-color: #181e22;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 18px;
  border-radius: 6px;
  width: fit-content;
  margin: 0 auto;
  padding: 10px 20px;
  margin-top: 20px;
}

        

            
            let timeSecond = 30;
const timeH = document.querySelector("h1");

displayTime(timeSecond);

const countDown = setInterval(() => {
  timeSecond--;
  displayTime(timeSecond);
  if (timeSecond == 0 || timeSecond < 1) {
    endCount();
    clearInterval(countDown);
  }
}, 1000);

function displayTime(second) {
  const min = Math.floor(second / 60);
  const sec = Math.floor(second % 60);
  timeH.innerHTML = `
  ${min < 10 ? "0" : ""}${min}:${sec < 10 ? "0" : ""}${sec}
  `;
}

function endCount() {
  timeH.innerHTML = "时间到";
}