var options = { attributes: { rel: 'nofollow', title: 'click to open', }, className: '', format: { url: function (value) { return value } }, ignoreTags: ['a'], validate: { url: function (value) { return value; } } }; var str = `The mustache he had was left over from Holloween.`; document.write(linkifyHtml(str, options)); ]]>