Untitled

why i am not being directed to game.html after clicking on the buttons?
 The
 file Structure is server/server.js, public/index.html,public/game.html.
 index.html

 < !DOCTYPE html>

 <html>

 <title>QUIZ GAME</title>


  <meta charset="UTF-8">

 <meta name="viewport" content="width=device-width, initial-scale=1">

 <link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">

 <body>

 <!-- Navbar (sit on top) -->

<div class="w3-top">

<div class="w3-bar w3-white w3-wide w3-padding w3-card">

<a href="#home" class="w3-bar-item w3-button"><b>QUIZ</b>Book</a>

<!-- Float links to the right. Hide them on small screens -->

<div class="w3-right w3-hide-small">

<a href="#projects" class="w3-bar-item w3-button">CATEGORIES</a>

<a href="#about" class="w3-bar-item w3-button">About</a>

<a href="#contact" class="w3-bar-item w3-button">Contact</a>

</div>

</div>

</div>

 <!-- Header -->


 <header class="w3-display-container w3-content w3-wide" style="max-

  width:1500px;" id="home">

 <img class="w3-image" src="pics/quiz.jpg" alt="Architecture" width="1500"

 height="800">

 <div class="w3-display-middle w3-margin-top w3-center">

 <h1 class="w3-xxlarge w3-text-white"><span class="w3-padding w3-black w3-

  opacity-min"><b>QUIZ</b></span> <span class="w3-hide-small w3-text-light-

  grey">Book</span></h1>


</div>

</header>

 <!-- Page content -->

 <div class="w3-content w3-padding" style="max-width:1564px">

 <!-- Project Section -->

 <div class="w3-container w3-padding-32" id="projects">

 <h3 class="w3-border-bottom w3-border-light-grey w3-padding-

 16">CATEGORIES</h3>

 </div>

 <div class="w3-row-padding">

 <div class="w3-col l3 m6 w3-margin-bottom">

 <div class="w3-display-container">

  <button class="w3-button w3-hover-black" ><img src="pics/GK.jpg"

  alt="House" style="width:100%"><div class="content">

  <h3>GENERAL KNOWLEDGE</h3></div></button>

  </div>

 </div>

 <div class="w3-col l3 m6 w3-margin-bottom">

 <div class="w3-display-container">

   <button class="w3-button w3-hover-black"><img src="pics/maths_school.jpg"


 alt="House" style="width:100%"> </button>

  </div>

 </div>

 <div class="w3-col l3 m6 w3-margin-bottom">

  <div class="w3-display-container">

    <button class="w3-button w3-hover-black"><img src="pics/bollywood.jpg"

  alt="House" style="width:100%"> </button>


  </div>

</div>

<div class="w3-col l3 m6 w3-margin-bottom">

  <div class="w3-display-container">

        <button class="w3-button w3-hover-black"><img

    src="pics/hollywood.jpg" alt="House" style="width:100%"> </button>


  </div>

 </div>

 </div>


<div class="w3-row-padding">

 <div class="w3-col l3 m6 w3-margin-bottom">

  <div class="w3-display-container">

        <button class="w3-button w3-hover-black"><img src="pics/cricket.jpg"

       alt="House" style="width:99%"> </button>


  </div>

 </div>

 <div class="w3-col l3 m6 w3-margin-bottom">

 <div class="w3-display-container">

  <button class="w3-button w3-hover-black"> <img src="pics/football.jpg"

  alt="House" style="width:99%"></button>

  </div>

 </div>

 <div class="w3-col l3 m6 w3-margin-bottom">

 <div class="w3-display-container">

 <button class="w3-button w3-hover-black"> <img src="pics/sports.jpg"

 alt="House" style="width:99%"> </button>

  </div>

 </div>

 <div class="w3-col l3 m6 w3-margin-bottom">

  <div class="w3-display-container">

 <button class="w3-button w3-hover-black"> <img src="pics/science.png"

alt="House" style="width:99%"> </button>

  </div>

</div>

<div class="w3-col l3 m6 w3-margin-bottom">

 <div class="w3-display-container">

  <button class="w3-button w3-hover-black"><img src="pics/history.jpg"

  alt="House" style="width:99%"> </button>

  </div>

  </div>

  <div class="w3-col l3 m6 w3-margin-bottom">

  <div class="w3-display-container">

  <button class="w3-button w3-hover-black"> <img src="pics/music.png"

  alt="House" style="width:99%"> </button>

  </div>

 </div>

 <div class="w3-col l3 m6 w3-margin-bottom">

 <div class="w3-display-container">

  <button class="w3-button w3-hover-black">  <img src="pics/tennis.jpg"

 alt="House" style="width:99%"> </button>

  </div>

 </div>

 </div>


 <!-- About Section -->

<div class="w3-container w3-padding-32" id="about">

<h3 class="w3-border-bottom w3-border-light-grey w3-padding-16">About</h3>

</div>


 <!-- Contact Section -->

 <div class="w3-container w3-padding-32" id="contact">

 <h3 class="w3-border-bottom w3-border-light-grey w3-padding-

 16">Contact</h3>

 <p>Lets get in touch and talk about your and our next project.</p>

 <form action="/" target="_blank">

  <input class="w3-input" type="text" placeholder="Name" required

 name="Name">

 <input class="w3-input w3-section" type="text" placeholder="Email" required

name="Email">

 <input class="w3-input w3-section" type="text" placeholder="Subject"

required name="Subject">

  <input class="w3-input w3-section" type="text" placeholder="Comment"

 required name="Comment">

 <button class="w3-button w3-black w3-section" type="submit">

   <i class="fa fa-paper-plane"></i> SEND MESSAGE

</button>

</div>

</div>

<script>

document.getElementsByClassName('w3-button w3-hover-black').onclick =

function(){

    window.location.href = "https://localhost:3000/game.html";

}

</html>


 in game.html

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8" />

<meta http-equiv="X-UA-Compatible" content="IE=edge">

<title>QUIZ book</title>

<meta name="viewport" content="width=device-width, initial-scale=1">

<link rel="stylesheet" type="text/css" media="screen" href="main.css" />

</head>

<body>

<div id = "gameDiv"></div>

 <script src = "/socket.io/socket.io.js"></script>

 <script src = "lib/phaser.min.js"></script>

  <script src = "main.js"></script>

 <script src = "player.js"></script>

 </body>

</html>


in server/server.js

var express = require('express');

 var socketIo = require('socket.io');

var path = require('path');

var http = require('http');

var app = express();

const port = process.env.PORT ||3000 ;

const pathjoin = path.join(__dirname, '../public');

 const pathjoin1 = path.join(__dirname,'../public/game.html');

 var server = http.createServer(app);

 app.use(express.static(pathjoin));

 app.use('/game.html',express.static(pathjoin1));

 var io = socketIo(server);

 io.on('connection',(socket)=>{

 console.log('user connected ' + socket.id);

  });


server.listen(port,()=>{

console.log('server started');

});