list.html

<!doctype html>
<html lang="en">
  <head>
    <title>To Do List--</title>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css" integrity="sha384-PsH8R72JQ3SOdhVi3uxftmaW6Vc51MKb0q5P2rRUpPvrszuE4W1povHYgTpBfshb" crossorigin="anonymous">
  </head>
  <body>
        <nav class="navbar navbar-light" style="background-color: aquamarine;"">
                <a class="navbar-brand" href="#">Algras--</a>
                <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
                  <span class="navbar-toggler-icon"></span>
                </button>
                <div class="collapse navbar-collapse" id="navbarNav">
                  <ul class="navbar-nav">
                    <li class="nav-item active">
                      <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
                    </li>
                  </ul>
                </div>
              </nav>
            <div class="jumbotron">
                    <h1>To Do List!</h1>
              <input type="text" id="nama"/>
                    <button id="tombol">Kirim</button>
                    <ul class="list-group" id="list">
                    
                    </ul>
                    
                    <script>
                            
                             var namaE = document.getElementById("nama")
                             var tombolE = document.getElementById("tombol")
                             var list = document.getElementById('list')
                      
                            var x = 6
                      
                             // alert(x)
                      
                             console.log(x)
                      
                             // namaE.value = "Algra"
                      
                             tombol.addEventListener('click', function(){
                                 // alert("Hai " +nama.value)
                                 var x = namaE.value
                                 list.innerHTML = list.innerHTML + "<li class=\"list-group-item\">" + x + "</li>";
                             })
                      
                         </script>
    </div>
<h2>( To reset, Do CTRL + R / Refresh Page )</h2>

    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.3/umd/popper.min.js" integrity="sha384-vFJXuSJphROIrBnz7yo7oB41mKfc8JzQZiCq4NCceLEaO4IHwicKwpJf9c9IpFgh" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta.2/js/bootstrap.min.js" integrity="sha384-alpBpkh1PFOepccYVYDB4do5UnbKysX5WZXm3XxPqe5iKTfUKjNkCk9SaVuEZflJ" crossorigin="anonymous"></script>
  </body>
</html>