lsp-ui-doc.html

<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/showdown/1.9.0/showdown.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/highlight.min.js"></script>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/2.10.0/github-markdown.css">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/default.min.css">
    <style>

     :root {
       --webkit-max-width-px: 600px;
     }

     .markdown-body {
       box-sizing: border-box;
       min-width: var(--webkit-max-width-px);
       max-width: var(--webkit-max-width-px);
       margin: 0 auto;
       padding: 10px;
     }

     .markdown-body pre code {
       white-space: pre-wrap;
     }
    </style>
  </head>
  <body>
    <div id="lsp-ui-webkit" class="markdown-body">
    </div>
    <script>
     var converter = new showdown.Converter({simpleLineBreaks: true});
     var lastSymbol = "";
     var elem = document.getElementById('lsp-ui-webkit');

     function renderMarkdown(symbol, markedString) {
       if (symbol == lastSymbol) return [elem.offsetWidth, elem.offsetHeight];
       decodedString = decodeURIComponent(markedString);
       html = converter.makeHtml(decodedString);
       elem.innerHTML = html;
       lastSymbol = symbol;

       document.querySelectorAll('pre code').forEach(function(codeBlock) {
         hljs.highlightBlock(codeBlock);
       });

       return [elem.offsetWidth, elem.offsetHeight];
     }

    </script>
  </body>
</html>