Regular expression to match url string not containing protocol name or WWW

In most cases we use the protocol name (http, ftp, https, ...
) or www to identify the url from the string, but in this case the only way to make sure if this valid url or not valid url is to check the root domain: com, net, org, ...
here is the latest valid top level domains: http://data.iana.org/TLD/tlds-alpha-by-domain.txt You can take the important domains (or all) and add it in your regular expression Ex: var text="not valid url: google.java.
valid url: https://www.google.com.
valid url: google.me.
valid url: just.edu.jo"; var re=/(https?:\/\/|ftp:\/\/|file:\/\/)?[a-z\.0-9]+\.(com|net|org|me|jo)([^a-zA-Z]|$)/gi var cleanText=text.replace(re,"$3"); console.log(cleanText);

Thank you Hazem, But this solution is limit by list of generic top-level domains (gTLDs) and country code top-level domains (ccTLDs) gTLDs and ccTLDs list may updated and its too long list.| e.g just.edu.jo feed://example.com/rss.xml both examples will not catch as URLs I want more generic expression