fix: do not parse Markdown inside HTML tags

Closes developit#98

src/index.js

@@ -24,7 +24,7 @@ function encodeAttr(str) {
 
 /** Parse Markdown into an HTML String. */
 export default function parse(md, prevLinks) {
-	let tokenizer = /((?:^|\n+)(?:\n---+|\* \*(?: \*)+)\n)|(?:^``` *(\w*)\n([\s\S]*?)\n```$)|((?:(?:^|\n+)(?:\t|  {2,}).+)+\n*)|((?:(?:^|\n)([>*+-]|\d+\.)\s+.*)+)|(?:!\[([^\]]*?)\]\(([^)]+?)\))|(\[)|(\](?:\(([^)]+?)\))?)|(?:(?:^|\n+)([^\s].*)\n(-{3,}|={3,})(?:\n+|$))|(?:(?:^|\n+)(#{1,6})\s*(.+)(?:\n+|$))|(?:`([^`].*?)`)|(  \n\n*|\n{2,}|__|\*\*|[_*]|~~)/gm,
+	let tokenizer = /((?:^|\n+)(?:\n---+|\* \*(?: \*)+)\n)|(?:^``` *(\w*)\n([\s\S]*?)\n```$)|((?:(?:^|\n+)(?:\t|  {2,}).+)+\n*)|((?:(?:^|\n)([>*+-]|\d+\.)\s+.*)+)|(?:!\[([^\]]*?)\]\(([^)]+?)\))|(\[)|(\](?:\(([^)]+?)\))?)|(?:(?:^|\n+)([^\s].*)\n(-{3,}|={3,})(?:\n+|$))|(?:(?:^|\n+)(#{1,6})\s*(.+)(?:\n+|$))|(?:`([^`].*?)`)|(  \n\n*|\n{2,}|__|\*\*|[_*]|~~)|<[^>]+>/gm,
 		context = [],
 		out = '',
 		links = prevLinks || {},

test/index.js

@@ -151,6 +151,13 @@ describe('snarkdown()', () => {
 		});
 	});
 
+	describe('html', () => {
+		it('should not parse inside tags', () => {
+			expect(snarkdown('<div title="I **don\'t** parse"></div>')).to.equal('<div title="I **don\'t** parse"></div>');
+			expect(snarkdown('<a class="_b" target="_blank">a</a>')).to.equal('<a class="_b" target="_blank">a</a>');
+		});
+	});
+
 	describe('edge cases', () => {
 		it('should close unclosed tags', () => {
 			expect(snarkdown('*foo')).to.equal('<em>foo</em>');