tools/markdown.html at trunk · dupunkto/tools · GitHub

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<!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>Markdown</title>
    <link rel="stylesheet" type="text/css" href="main.css">

    <script src="/vendor/marked.js"></script>
    <script src="/vendor/prettier.js"></script>
    <script src="/vendor/prettier-markdown.js"></script>

    <style>
      header + .bar, h3 {
        margin-bottom: 0.5em;
      }

      textarea + .bar {
        margin-top: 0.5em;
      }

      textarea {
        font-family: monospace;
      }

      select {
        text-align: center;
      }

      iframe {
        width: 100%;
        min-height: 250px;
      }

      #source {
        white-space: pre-wrap;
        word-break: break-word;
        font-family: monospace;
        height: 250px;
        overflow-y: auto;
        margin-top: 0;
        border: 1px solid light-dark(#dedede ,#3d3d3d);
      }
    </style>
  </head>
  <body>
    <header>
      <h1><a href="index.html">Tools</a></h1>
    </header>

    <main>
      <header class="bar">
        <h2>Markdown</h2>
      </header>

      <div class="bar">
        <h3>Input</h3>
        <button onclick="format()">Format</button>
      </div>

      <textarea placeholder="# hello world" rows="10" cols="50" id="input"></textarea>

      <div class="bar">
        <select id="mode">
          <option value="source" selected>Convert</option>
          <option value="preview">Preview</option>
        </select>
      </div>

      <h3 id="heading">Output</h3>

      <iframe id="preview" hidden></iframe>
      <textarea id="source" rows="10" cols="50" readonly></textarea>

      <noscript>
        <small>This tool requires Javascript to work.</small>
      </noscript>
    </main>

    <script>
      const input = document.getElementById("input");
      const mode = document.getElementById("mode");
      const preview = document.getElementById("preview");
      const source = document.getElementById("source");
      const heading = document.getElementById("heading");

      function render() {
        const html = marked.parse(input.value);

        if (mode.value == 'source') {
          source.value = html;
          source.hidden = false;
          preview.hidden = true;
          heading.innerText = "Output";
        } else {
          preview.srcdoc = html;
          preview.hidden = false;
          source.hidden = true;
          heading.innerText = "Preview";
        }
      }

      async function format() {
        try {
          input.value = await prettier.format(input.value, {
            parser: 'markdown',
            plugins: prettierPlugins
          });
          render();
        } catch(e) {
          alert(`Error: ${e.message}`);
        }
      }

      input.addEventListener("input", render);
      mode.addEventListener("change", render);
    </script>

    <script src="/vendor/instant-page.js" type="module"></script>
    <script src="/offline.js"></script>
  </body>
</html>