htm-editor.js

class Toolbar extends React.Component {
  render() {
    return $$("div", { className: "toolbar"},
      $$(TextToolComponent, { tool: 'text', title: 'Switch text'}),
      $$(ToolComponent, { tool: 'emphasis', classNames: ['button', 'tool']}, "Emphasis"),
      $$(ToolComponent, { tool: 'strong', classNames: ['button', 'tool']}, "Strong")
    );
  }
}

$(function() {
  React.render(
    $$(HtmlEditor, {
      content: htmlContent,
      toolbar: Toolbar,
      enabledTools: ["strong", "emphasis"],
      onContentChanged: function(doc, change) {
        console.log('document changed', change);
        console.log('new content', doc.toHtml());
      }
    }),
    document.getElementById('editor_container')
  );
});