Trim arbitrary html code based on word count. To be used in conjuction with .innerHTML, so unclosed tags are closed automatically.

trim.es6

const trim = (html, wordCount = 16) => {

	const wordsAndTags = /<(.|\n)*?>|[^\s\<]+/g;
	const tag = /<(.|\n)*?>/;

	return html
		.match(wordsAndTags)
		.reduce((result, match) => {
		
			if (!wordCount) return result;
		
			const isTag = tag.test(match);
		
			isTag && wordCount--;
		
			return result + match + (isTag ? '' : ' ');
		
		}, '');
}