jotdown/examples/jotdown_wasm/index.html

<select id="fmt"><option value="preview">preview</option><option value="html">html</option></select>
<div id="jotdown" style="display:flex;">
  <script type="module">
    import init, { jotdown_render } from './pkg/jotdown_wasm.js';
    await init();

    let output = document.getElementById("output");
    let input = document.getElementById("input");
    let fmt = document.getElementById("fmt");

    function render() {
        let html = jotdown_render(input.innerText);
        if (fmt.value == "html") {
            output.classList.add("verbatim")
            output.innerText = html;
        } else if (fmt.value == "preview") {
            output.classList.remove("verbatim")
            output.innerHTML = html;
        }
    }

    render()

    input.onkeyup = render;
    fmt.onchange = render;

    // auto focus on input on load
    setTimeout(() => { input.focus(); }, 0);
  </script>
  <pre id="input" contenteditable="true" placeholder="Input djot here" style="width:50%;height:100%;min-height:8em;max-height:20em;resize:none;margin:0">*Hello world!*</pre>
  <pre id="output" readonly style="width:50%;height:100%;margin:0;min-height:8em;max-height:20em"></pre>
</div>