Automatic text linking
Renders a string as plaintext, with URLs converted to appropriate link elements.
- Use
String.prototype.split()
andString.prototype.match()
with a regular expression to find URLs in a string. - Return matched URLs rendered as
<a>
elements, dealing with missing protocol prefixes if necessary. - Render the rest of the string as plaintext.
const AutoLink = ({ text }) => { const delimiter = /((?:https?:\/\/)?(?:(?:[a-z0-9]?(?:[a-z0-9\-]{1,61}[a-z0-9])?\.[^\.|\s])+[a-z\.]*[a-z]+|(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3})(?::\d{1,5})*[a-z0-9.,_\/~#&=;%+?\-\\(\\)]*)/gi; return ( <> {text.split(delimiter).map(word => { const match = word.match(delimiter); if (match) { const url = match[0]; return ( <a href={url.startsWith('http') ? url : `http://${url}`}>{url}</a> ); } return word; })} </> ); }; ReactDOM.createRoot(document.getElementById('root')).render( <AutoLink text="foo bar baz http://example.org bar" /> );