React - Dynamic HTML (dangerouslySetInnerHTML attribute)

How to add dynamically HTML (for instance for when you have converted a markdown document in a HTML string).

In an html element, you pass to the dangerouslySetInnerHTML attribute an object with the attribute named __html that holds the HTML string

<element dangerouslySetInnerHTML={ { __html: htmlString } }</element>

with a function component

function DynamicHTML() {
  
  let html = '<h1>Hello World !</h1>';
  return <div dangerouslySetInnerHTML={ { __html: html}} />;
}

• The standard mandatory “root” DOM node (placeholder for React DOM manipulation)

<div id="root"></div>

• Rendering of the DynamicHTML component in the root div defined below

ReactDOM.render(
  <DynamicHTML/>,
  document.getElementById('root')
);

• Output: