How to handle html tags like <p>, <em>, <br> etc. ?

[adi286sadsd]

I have a string like <p>this is a <em>meeting<em><p>. How do i parse this into nodes?
Currently i get this error in combinator.ts
text.charAt is not a function at Array.<anonymous> (combinator.ts:46:25) at combinator.ts:9:30 at parseText (mod.ts:28:19) at parse (mod.ts:57:15)

[pocka]

This is a parser for Slack's mrkdwn message format.
To parse HTML strings, use HTML parser such as DOMParser (Web API) and node-html-parser.