交通指示灯红绿灯自动切换动画-html代码-BFW代码库

交通指示灯红绿灯自动切换动画

代码语言：html

代码描述：交通指示灯红绿灯自动切换动画

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开


<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">

<style>
html, body {
  padding: 0;
  margin: 0;
  background: wheat;
  font-family: 'Press Start 2P', cursive;
}
html #app, body #app {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
html #app #traffic_light, body #app #traffic_light {
  padding: 15px;
  border: 1px solid;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.9);
  border-radius: 15px;
  border: 4px solid gray;
}
html #app #traffic_light .light, body #app #traffic_light .light {
  margin: 0 5px;
  border: 4px solid gray;
  border-radius: 50%;
  width: 60px;
  height: 60px;
  backgroud: black;
}
html #app #traffic_light .light.red_light, body #app #traffic_light .light.red_light {
  background: red;
}
html #app #traffic_light .light.yellow_light, body #app #traffic_light .light.yellow_light {
  background: yellow;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
}
html #app #traffic_light .light.yellow_light .counting_sec, body #app #traffic_light .light.yellow_light .counting_sec {
  margin-left: 3px;
  margin-top: 4px;
}
html #app #traffic_light .light.green_light, body #app #traffic_light .light.green_light {
  background: green;
}
</style>

</head>
<body translate="no">
<div id="app">
<div id="traffic_light">
<div class="red_light light"></div>
<div class="yellow_light light">
<span class="counting_sec"></span>
</div>
<div class="green_light light"></div>
</div>
</div>

<script>
// 小練習需求＆規格：
// 1. 模擬紅綠燈變化 LOOP
// 2. 紅燈時，黃燈介面要顯示紅燈當前倒數秒數
// 3. 限用 Vanilla JS 

const RED = 'RED';
const GREEN = 'GREEN';
const YELLOW = 'YELLOW';

let currentLight = RED;

let rL = document.querySelector('.red_light');
let gL = document.querySelector('.green_light&.........完整代码请登录后点击上方下载按钮下载查看