JSFiddle - React, Tailwind, and code Playground

by artgas_pro

HTML

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <link rel="stylesheet" href="styles.css" />
  <script src="app.js"></script>
  <title>Aim Training | Проект 5</title>
</head>

<body>
  <div class="screen">
    <h1>Aim Training</h1>
    <a href="#" class="start" id="start">Начать игру</a>
  </div>

  <div class="screen">
    <h1>Выберите время</h1>
    <ul class="time-list" id="time-list">
      <li>
        <button class="time-btn" data-time="10">
          10 сек
        </button>
      </li>
      <li>
        <button class="time-btn" data-time="20">
          20 сек
        </button>
      </li>
      <li>
        <button class="time-btn" data-time="30">
          30 сек
        </button>
      </li>
      <li>
        <button class="time-btn" data-time="45">
          45 сек
        </button>
      </li>
    </ul>
  </div>

  <div class="screen">
    <h3>Осталось <span id="time">00:00</span></h3>
    <div class="board" id="board"></div>
  </div>
</body>

</html>

CSS

@import url("https://fonts.googleapis.com/css?family=Khula&display=swap");

* {
  box-sizing: border-box;
}

body {
  color: #fff;
  font-family: "Khula", sans-serif;
  height: 100vh;
  overflow: hidden;
  margin: 0;
  text-align: center;
}

a {
  color: #fff;
  text-decoration: none;
}

a:hover {
  color: #16d9e3;
}

.start {
  font-size: 1.5rem;
}

h1 {
  line-height: 1.4;
  font-size: 4rem;
}

.screen {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100vh;
  width: 100vw;
  transition: margin 0.5s ease-out;
  background: linear-gradient(90deg, #29323c 0%, #485563 100%);
}

.screen.up {
  margin-top: -100vh;
}

.time-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  list-style: none;
  padding: 0;
}

.time-list li {
  margin: 10px;
}

.time-btn {
  background-color: transparent;
  border: 2px solid #c0c0c0;
  color: #fff;
  cursor: pointer;
  font-family: inherit;
  padding: 0.5rem 1rem;
  font-size: 1.5rem;
}

.time-btn:hover {
  border: 2px solid #16d9e3;
  color: #16d9e3;
}

.hide {
  opacity: 0;
}

.primary {
  color: #16d9e3;
}

.board {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  width: 500px;
  height: 500px;
  background: linear-gradient(118.38deg, #29323c -4.6%, #485563 200.44%);
  box-shadow: -8px -8px 20px #2a333d, 10px 7px 20px #475462;
  border-radius: 30px;
  overflow: hidden;
}

.circle {
  background: linear-gradient(90deg, #16d9e3 0%, #30c7ec 47%, #46aef7 100%);
  position: absolute;
  border-radius: 50%;
  cursor: pointer;
}

JavaScript

window.onload = function () {
   const screens = document.querySelectorAll('.screen');
   const startBtn = document.getElementById('start');
   const timeList = document.getElementById('time-list');
   const timeEl = document.getElementById('time');
   const board = document.getElementById('board');
   const colors = ['#EE7217', '#FF00FE', '#7AE3D6', '#4447AD', '#E61A23', '#059A82', 'linear-gradient(90deg, #16d9e3 0%, #30c7ec 47%, #46aef7 100%)'];
   let time = 0;
   let score = 0;

   startBtn.addEventListener('click', (e) => {
      e.preventDefault();
      screens[0].classList.add('up');
   })

   timeList.addEventListener('click', (e) => {
      if (e.target.classList.contains('time-btn')) {
         time = +e.target.getAttribute('data-time');
         screens[1].classList.add('up');
         startGame();
      }
   })

   board.addEventListener('click', e => {
      if (e.target.classList.contains('circle')) {
         score++
         e.target.remove();
         createRandomCircle();
      }
   })

   function startGame() {
      setInterval(decreasetime, 1000);
      createRandomCircle();
      setTime(time);
   }

   function decreasetime() {
      if (time == 0) {
         finishGame();
      } else {
         let current = --time;
         if (current < 10) {
            current = `0${current}`;
         }
         setTime(current);
      }

   }

   function setTime(value) {
      timeEl.innerHTML = `00:${value}`;
   }

   function createRandomCircle() {
      const circle = document.createElement('div');
      const size = getRandomNamber(10, 60);
      const { width, height } = board.getBoundingClientRect();
      let color = getRandomColor();

      const x = getRandomNamber(0, width - size);
      const y = getRandomNamber(0, height - size);
      circle.style.top = `${y}px`;
      circle.style.left = `${x}px`;
      circle.style.background = color;

      circle.classList.add('circle');
      circle.style.width = `${size}px`;
     ...