link regex
var expression = /[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9()]{1,6}\b([-a-zA-Z0-9()@:%_\+.~#?&//=]*)?/gi; var regex = new RegExp(expression); var t = 'www.google.com'; if (t.match(regex)) { alert("Successful match"); } else { alert("No match"); }