converter.hooks.chain("postConversion", function(html) { var tag_whitelist = /^(<\/?(h1|h2|h3|h4|h5|h6|p|ul|ol|li|dl|dt|dd|pre|blockquote|code|q|table|thead|tbody|tfoot|tr|th|td|em|strong|del|ins|sup|sub|s)>||<\/a>|||<(br|hr)\s?\/?>)$/i; // is for with alignment in md extra syntax var str = html.replace(/<[^>]*>?/gim, function(tag){ var s; if (!tag.match(tag_whitelist)) { return ''; } // rm attributes start with 'on' s = tag.replace(/on\w+\s*=.*(?=\s+|>)/gi, ''); // rm attributes of which the values start with 'javascript:' s = s.replace(/\w+\s*=.*javascript\:.*(?=\s+|>)/gi, ''); return s; }); return str; });