技術文章 » js原生電影院系統

js原生電影院系統

2020-10-17 12:00:54 
<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
	<style type="text/css">
		*{padding: 0px;margin: 0px;list-style: none;}
		body
		{
			background-color: #242333;
			color: #fff;
			display: flex;
			align-items: center;
			justify-content: center;
			height: 100vh;
			font-family: Arial, Helvetica, sans-serif;
		}
		h1
		{
			margin-bottom: 20px;
		}
		.movie-container select
		{
			background-color: #fff;
			border:0;
			border-radius: 5px;
			font-size: 14px;
			padding: 5px 15px;
			margin-left: 10px;
		}
		.seat
		{
			background-color: #444451;
			height: 12px;
			width: 15px;
			border-top-right-radius: 10px;
			border-top-left-radius: 10px;
			margin: 3px;
		}
		.seat.selected
		{
			background-color: #6feaf6;
		}
		.seat.occupied {
		  background-color: #fff;
		}
		.seat:nth-of-type(2)
		{
			margin-right: 18px;
		}
		.seat:nth-last-of-type(2) {
		  margin-left: 18px;
		}
		.seat:not(.occupied):hover {
		  cursor: pointer;
		  transform: scale(1.2);
		}
		.showcase .seat:not(.occupied):hover {
		  cursor: default;
		  transform: scale(1);
		}
		.showcase
		{
			background-color: rgba(0,0,0,0.1);
			padding: 5px 10px;
			border-radius: 5px;
			  color: #777;
			  list-style-type: none;
			  display: flex;
			  margin-top: 20px;
			  justify-content: space-between;
		}
		.showcase li {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 10px;
}

.showcase li small {
  margin-left: 2px;
}
.container
{
	perspective: 1000px;
	margin-bottom:30px;
	margin-left: 60px;
}
.screen {
  background-color: #fff;
  height: 70px;
  width: 100%;
  margin: 15px 0;
  transform: rotateX(-45deg);
  box-shadow: 0 3px 10px rgba(255, 255, 255, 0.7);
}
.row/*這一句至關重要*/
{
	display: flex;
}
.text
{
	margin: 5px 30px;
}
.text span
{
	color: #6feaf6;
}
	</style>
</head>
<body>
	<div class="movie-container">
		<h1>歡迎來到cyg線上影院</h1>
		<div>
			選擇影片:
			<select id="movie">
				<option value="32">寄生蟲（票價：32元）</option>
				<option value="35">小丑（票價：35元）</option>
				<option value="38">好萊塢往事（票價：38元）</option>
				<option value="30">玩具總動員（票價：30元）</option>
			</select>
		</div>
		<ul class="showcase">
		<li>
			<div class="seat"></div>
			<small>可選</small>
		</li>
		<li>
			<div class="seat selected"></div>
			<small>已選</small>
		</li>
		<li>
			<div class="seat occupied"></div>
			<small>不可選</small>
		</li>
		</ul>
			<div class="screen"></div>
			<div class="container">
				<div class="row">
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
				</div>
				<div class="row">
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat occupied"></div>
					<div class="seat occupied"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
				</div>
				<div class="row">
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat occupied"></div>
					<div class="seat occupied"></div>
				</div>
				<div class="row">
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
				</div>
				<div class="row">
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat occupied"></div>
					<div class="seat occupied"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
				</div>
				<div class="row">
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat"></div>
					<div class="seat occupied"></div>
					<div class="seat occupied"></div>
					<div class="seat occupied"></div>
					<div class="seat"></div>
				</div>
			</div>
			<p class="text">
				您已經選擇了:<span id="count">0</span>個座位,總計票價為<span id="total">0</span>元
			</p>
	</div>
	<script type="text/javascript">
		const container = document.querySelector(".container");
		const seats = document.querySelectorAll(".row .seat:not(.occupied)");
		const count = document.getElementById("count");
		const total = document.getElementById("total");
		const movieSelect = document.getElementById("movie");
		let ticketPrice = +movieSelect.value;//加+代表Number,不加代表字串
		populateUI();
		movieSelect.addEventListener('change',e=>// 電影下拉框事件監聽
		{
			ticketPrice=+e.target.value;//意思是:某一個option的值強行變成Number賦值給票價
			setMovieData(e.target.selectedIndex,e.target.value);
			//console.log(e.target.selectedIndex,e.target.value);//index從0開始,值為value
			undateSeletedCount();
		});//下拉框改變時
		container.addEventListener("click",e=>// 座位點選事件
		{
			if(e.target.classList.contains("seat")&&!e.target.classList.contains("occupied"))//意識是如果e.target標籤中包含seat的話並且e.target中不包含occupied
			{
				e.target.classList.toggle("selected");
				undateSeletedCount();
			}
		});
		function setMovieData(movieIndex, moviePrice)//儲存電影索引值和票價
		{
			//儲存到本地儲存中
			localStorage.setItem("selectedMovieIndex", movieIndex);//電影索引值
			localStorage.setItem("selectedMoviePrice", moviePrice);//票價
		}
		function undateSeletedCount()/// 更新座位數及總票價
		{
			const selectedSeats=document.querySelectorAll(".row .seat.selected");
			//console.log(selectedSeats);//如果這裡要有值得點選某一個座位
			const seatsIndex=[...selectedSeats].map(seat=>[...seats].indexOf(seat));//把點選的座位
			//console.log(...seats);//這以上的兩句的意思是:點選的[...selectedSeats].map(seat)在[...seats].indexOf(seat)中第一次出現的索引值.
			//儲存到本地儲存中.
			localStorage.setItem("selectedSeats",JSON.stringify(seatsIndex));//意思是因為是陣列所以轉換為字串然後儲存到本地儲存中.

			 const selectedSeatsCount = selectedSeats.length;//點選的數量
			  count.innerText = selectedSeatsCount;//數量(座位)
			  total.innerText = selectedSeatsCount * ticketPrice;//*起來的票價
			  /**/
			  //console.log( "座位"+count.innerText ,"票價"+total.innerText);
		}
		function populateUI() {// 獲取本地資料並渲染樣式
			const selectedSeats=JSON.parse(localStorage.getItem("selectedSeats"));//點選的
			if(selectedSeats!=null&&selectedSeats.length>0)
			{//意思是:儲存起來的點選的正方形。不為空並且至少有一個的話.
				seats.forEach((seat,index)=>//遍歷渲染顏色
					{
						if(selectedSeats.indexOf(index)>-1)
						{
							seat.classList.add("selected");
						}
					});
			}
			  const selectedMovieIndex = localStorage.getItem("selectedMovieIndex");
			  //意思是option的index值,在不為空的條件下,點選的是哪一個就賦值設定哪一個·的座位與票價。
			  // movieSelect.selectedIndex 代表哪一個option從0開始哦
			   if (selectedMovieIndex !== null) {
    movieSelect.selectedIndex = selectedMovieIndex;
  }
		}
	</script>
</body>
</html>