const hashtagPattern = /(^|\s)#([a-zA-Z0-9_]+)/g;
text = text.replace(hashtagPattern, (match, space, hashtag) =>
`${space}<a href="https://twitter.com/hashtag/${hashtag}" ${attr}>#${hashtag}</a>`);
const hashtagPattern = /(^|\s)#([a-zA-Z0-9_]+)/g;
text = text.replace(hashtagPattern, (match, space, hashtag) =>
`${space}<a href="https://twitter.com/hashtag/${hashtag}" ${attr}>#${hashtag}</a>`);