<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Swipe Keyboard</title>
  <style>
    body {
      -webkit-touch-callout: none;
      -webkit-user-select: none;
      -khtml-user-select: none;
      -moz-user-select: none;
      -ms-user-select: none;
      user-select: none;
    }

    .letter {
      padding: 10px;
      border: 1px solid slateblue;
      margin: 20px;
      line-height: 70px;
      background-color: aquamarine;
    }

    .letter.disabled {
      background-color: gray;
    }

    .letter:hover {
      background-color: slateblue;
    }

    .u1 {
      padding-left: 10px;
      padding-right: 10px;
    }

    .u6 {
      margin-left: 300px;
      /*yeah I'm not good at CSS*/
      padding-left: 60px;
      padding-right: 60px;
    }
  </style>
</head>

<body>
  <div id="container">
    <h1>Swipe keyboard!</h1>
    <p>Click and drag to type, no need to let go!</p>
    <p>(Actually, input will be cleared on mousedown)</p>
    <textarea disabled name="text" id="text" cols="30" rows="10">

    </textarea> <br>
  </div>

  <script>
    // You can modify your keyboard layout by changing this string
    let letters = Array.from("QWERTYUIOP\nASDFGHJKL<\nZXCVBNM,.!\n ");
    let container = document.getElementById('container');
    let write = false; // Keyboard enabled or not
    function toggleKeyboard() {
      let keys = document.getElementsByClassName("letter");
      keys = [].slice.call(keys);
      keys.forEach(letter => {
        letter.className = write ? letter.className.replace("disabled", "") : letter.className + " disabled";
      });
    }
    const startInput = (element) => {
      write = true;
      text.value = "";
      toggleKeyboard();
    };
    const endInput = () => {
      write = false;
      toggleKeyboard();
    };
    const addLetter = (element) => {
      let char = element.srcElement.innerHTML;
      if (write)
        if (char != "&lt;") // Ah yes this is the backspace key
          text.value = text.value + char;
        else
          text.value = text.value.substring(0, text.value.length - 1);
    }
    document.onmousedown = startInput;
    document.onmouseup = endInput;
    letters.forEach(letter => {
      if (letter === '\n') {
        container.appendChild(document.createElement('br')); //lmao
      } else {
        let node = document.createElement('span');
        node.className = "letter " + (letter == " " ? "u6" : "u1");
        node.onmouseenter = addLetter;
        node.appendChild(document.createTextNode(letter));
        container.appendChild(node);
      }
    });
    let text = document.getElementById('text');
  </script>
</body>

</html>