petitparser.github.io/examples/lisp/lisp.html at main · petitparser/petitparser.github.io · GitHub

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<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Lisp Interpreter</title>
  <link rel="stylesheet"
        href="//cdn.rawgit.com/milligram/milligram/master/dist/milligram.min.css">
  <style>
    textarea { width: 100%; height: 200px; }
    #input, #output, #console, #environment { font-family: monospace; }
    .error { color: red; }
  </style>
</head>
<body>
  <h1>Lisp Interpreter</h1>

  <h2>Program</h2>
  <textarea id="input">
(define (fib n)
  (if (<= n 1)
    1
    (+ (fib (- n 1)) (fib (- n 2)))))
(fib 10)
  </textarea>
  <input type="submit" id="evaluate" value="Evaluate"/>

  <h2>Output</h2>
  <p id="output"></p>

  <h3>Console</h3>
  <p id="console"></p>

  <h3>Environment</h3>
  <p id="environment"></p>

  <script src="lisp.dart.js"></script>
  <script async src="https://www.googletagmanager.com/gtag/js?id=G-QK0KCHXW3F"></script>
  <script>window.dataLayer = window.dataLayer || [];function gtag(){dataLayer.push(arguments);}gtag('js', new Date());gtag('config', 'G-QK0KCHXW3F');</script>
</body>
</html>