SimpleBoard/edit.html at master · SNU-HCIL/SimpleBoard · GitHub

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<!DOCTYPE html>
<html>
<head>
<style type="text/css">
  textarea {
    width:800px;
    height:600px;
  }
  </style>
</head>

<body>
  <textarea id="content" autofocus> </textarea>

  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script type="text/javascript" src="//cdnjs.cloudflare.com/ajax/libs/socket.io/1.3.6/socket.io.min.js"></script>

  <script>


    document.addEventListener('DOMContentLoaded', () =>{
let content = document.querySelector('#content');

function show(html){
  content.value = html;
    }
    let socket = io.connect('http://' + document.domain + ':' + location.port);

    socket.on('connect', function() {
      socket.on('update', function(html){
        console.log('updated')
        show(html);
      })

      content.onkeyup = function() {
        socket.emit('edit', content.value)
      }
    });
})
  </script>
</body>
</html>