Downsize 
Tag-safe HTML and XML text-truncation!
npm install downsizeUsage
Word-truncation
downsize("<p>some markup here...</p>",{"words": 2});<p>some markup</p>Character truncation
downsize("<p>some markup here...</p>",{"characters": 6});<p>some m</p>Appending an ellipsis
downsize("<p>some markup here...</p>",{"characters": 6, "append": "..."});<p>some m...</p>Rounding to the end of the paragraph
downsize("<p>Why, hello there!</p><p>Hello again!</p>",{"characters": 6, round:true});<p>Why, hello there!</p>Notes
Downsize is designed to handle bad markup, and should count words and characters accurately in spite of it. But it won't hold your hand.
It does close outstanding open tags for you, but leaves erroneous close-tags for which the opening tag couldn't be found or was erroneously nested.
Testing
npm test