code-boxx/0-JS-SEAT-RESERVE.MD

## 0-JS-SEAT-RESERVE.MD

      
    Raw
  

              0-JS-SEAT-RESERVE.MD
            
          
    JAVASCRIPT SEAT RESERVATION

https://code-boxx.com/seat-reservation-javascript/
LICENSE

Copyright by Code Boxx
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

  
## 1-seat-reserve.html
<!DOCTYPE html>
<html>
  <head>
    <title>Seat Reservation</title>
    <meta charset="utf-8">
    <script src="2-seat-reserve.js"></script>
    <link rel="stylesheet" href="3-seat-reserve.css">
  </head>
  <body>
    <!-- (A) SEAT LAYOUT -->
    <div id="layout"></div>

    <!-- (B) LEGEND -->
    <div id="legend">
      <div class="seat"></div> <div class="txt">Available</div>
      <div class="seat taken"></div> <div class="txt">Taken</div>
      <div class="seat selected"></div> <div class="txt">Your Chosen Seats</div>
    </div>

    <!-- (C) SAVE SELECTION -->
    <button id="save" onclick="reserve.save()">Reserve Seats</button>
  </body>
</html>

## 2-seat-reserve.js
var reserve = {
  // (A) INIT
  init : () => {
    // (A1) GET LAYOUT WRAPPER
    let layout = document.getElementById("layout");

    // (A2) GENERATE SEATS
    for (let i=65; i<=68; i++) { for (let j=1; j<=4; j++) {
      let seat = document.createElement("div");
      seat.innerHTML = String.fromCharCode(i) + j;
      seat.className = "seat";
      seat.onclick = () => reserve.toggle(seat);
      layout.appendChild(seat);
    }}

    // (A3) FOR DEMO ONLY - RANDOM TAKEN SEATS
    let all = document.querySelectorAll("#layout .seat"),
        len = all.length - 1, rnd = [];
    while (rnd.length != 3) {
      let r = Math.floor(Math.random() * len);
      if (!rnd.includes(r)) { rnd.push(r); }
    }
    for (let i of rnd) {
      all[i].classList.add("taken");
      all[i].onclick = "";
    }
  },

  // (B) CHOOSE THIS SEAT
  toggle : seat => seat.classList.toggle("selected"),

  // (C) SAVE RESERVATION
  save : () => {
    // (C1) GET SELECTED SEATS
    let selected = document.querySelectorAll("#layout .selected");

    // (C2) ERROR!
    if (selected.length == 0) { alert("No seats selected."); }

    // (C3) SELECTED SEATS
    else {
      // (C3-1) GET SELECTED SEAT NUMBERS
      let seats = [];
      for (let s of selected) { seats.push(s.innerHTML); }

      // (C3-2) DO SOMETHING WITH IT...
      let data = new FormData();
      data.append("seats", JSON.stringify(seats));
      data.append("name", "JON DOE");
      data.append("email", "JON@DOE.COM");
      fetch("4-dummy.php", {
        method: "POST",
        body : data
      })
      .then(res => res.text())
      .then(txt => console.log(txt));
    }
  }
};
window.addEventListener("DOMContentLoaded", reserve.init);

## 3-seat-reserve.css
/* (A) SEAT & "COLOR CODE" */
.seat {
  text-align: center;
  padding: 20px 10px;
  border-radius: 10px;
  background: #f1f1f1;
}
.taken { background: #df0000; color: #fff; }
.selected { background: #87ff96; }

/* (B) SEATS LAYOUT */
#layout {
  max-width: 400px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 10px;
  margin-bottom: 20px;
}

/* (C) LEGEND */
#legend {
  display: grid;
  grid-gap: 10px;
  grid-template-columns: 50px auto ;
}
#legend .txt {
  display: flex;
  align-items: center;
}

/* (D) SAVE */
#save {
  font-size: 20px;
  margin-top: 20px;
  padding: 10px 20px;
  border: 0;
  color: #fff;
  background: #00479f;
}

/* (X) DOES NOT MATTER */
* {
  font-family: arial, sans-serif;
  box-sizing: border-box;
}

## 4-dummy.php
<?php
print_r($_POST);
	<!DOCTYPE html>
	<html>
	<head>
	<title>Seat Reservation</title>
	<meta charset="utf-8">
	<script src="2-seat-reserve.js"></script>
	<link rel="stylesheet" href="3-seat-reserve.css">
	</head>
	<body>
	<!-- (A) SEAT LAYOUT -->
	<div id="layout"></div>

	<!-- (B) LEGEND -->
	<div id="legend">
	<div class="seat"></div> <div class="txt">Available</div>
	<div class="seat taken"></div> <div class="txt">Taken</div>
	<div class="seat selected"></div> <div class="txt">Your Chosen Seats</div>
	</div>

	<!-- (C) SAVE SELECTION -->
	<button id="save" onclick="reserve.save()">Reserve Seats</button>
	</body>
	</html>
	var reserve = {
	// (A) INIT
	init : () => {
	// (A1) GET LAYOUT WRAPPER
	let layout = document.getElementById("layout");

	// (A2) GENERATE SEATS
	for (let i=65; i<=68; i++) { for (let j=1; j<=4; j++) {
	let seat = document.createElement("div");
	seat.innerHTML = String.fromCharCode(i) + j;
	seat.className = "seat";
	seat.onclick = () => reserve.toggle(seat);
	layout.appendChild(seat);
	}}

	// (A3) FOR DEMO ONLY - RANDOM TAKEN SEATS
	let all = document.querySelectorAll("#layout .seat"),
	len = all.length - 1, rnd = [];
	while (rnd.length != 3) {
	let r = Math.floor(Math.random() * len);
	if (!rnd.includes(r)) { rnd.push(r); }
	}
	for (let i of rnd) {
	all[i].classList.add("taken");
	all[i].onclick = "";
	}
	},

	// (B) CHOOSE THIS SEAT
	toggle : seat => seat.classList.toggle("selected"),

	// (C) SAVE RESERVATION
	save : () => {
	// (C1) GET SELECTED SEATS
	let selected = document.querySelectorAll("#layout .selected");

	// (C2) ERROR!
	if (selected.length == 0) { alert("No seats selected."); }

	// (C3) SELECTED SEATS
	else {
	// (C3-1) GET SELECTED SEAT NUMBERS
	let seats = [];
	for (let s of selected) { seats.push(s.innerHTML); }

	// (C3-2) DO SOMETHING WITH IT...
	let data = new FormData();
	data.append("seats", JSON.stringify(seats));
	data.append("name", "JON DOE");
	data.append("email", "JON@DOE.COM");
	fetch("4-dummy.php", {
	method: "POST",
	body : data
	})
	.then(res => res.text())
	.then(txt => console.log(txt));
	}
	}
	};
	window.addEventListener("DOMContentLoaded", reserve.init);
	/* (A) SEAT & "COLOR CODE" */
	.seat {
	text-align: center;
	padding: 20px 10px;
	border-radius: 10px;
	background: #f1f1f1;
	}
	.taken { background: #df0000; color: #fff; }
	.selected { background: #87ff96; }

	/* (B) SEATS LAYOUT */
	#layout {
	max-width: 400px;
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	grid-gap: 10px;
	margin-bottom: 20px;
	}

	/* (C) LEGEND */
	#legend {
	display: grid;
	grid-gap: 10px;
	grid-template-columns: 50px auto ;
	}
	#legend .txt {
	display: flex;
	align-items: center;
	}

	/* (D) SAVE */
	#save {
	font-size: 20px;
	margin-top: 20px;
	padding: 10px 20px;
	border: 0;
	color: #fff;
	background: #00479f;
	}

	/* (X) DOES NOT MATTER */
	* {
	font-family: arial, sans-serif;
	box-sizing: border-box;
	}