regex101: PCRE (Legacy) Match Workspace

Regular Expression

(http|ftp|https)://([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:/~+#-]*[\w@?^=%&/~+#-])?

New

#element{ color : #fff; }
#element2,
.element3 ,
.whatever{ background: red; }

.test, #test1
.test2, .test3,
#test111,
.element5555, #fooooooter, #salam, #test{ display: none; color: #000000  ; background-color: #fff }

#element8 tr .bacon{ font-size: 10000em; 
 background: linear-gradient(top, #000, #FFF);
 box-shadow: 0 0 10px #fff inset ;
}

Substitution

#element{ color : #fff; }
#element2,
.element3 ,
.whatever{ background: red; }

.test, #test1
.test2, .test3,
#test111,
.element5555, #fooooooter, #salam, #test{ display: none; color: #000000  ; background-color: #fff }

#element8 tr .bacon{ font-size: 10000em; 
 background: linear-gradient(top, #000, #FFF);
 box-shadow: 0 0 10px #fff inset ;
}