Regular Expressions 101

^start of line

Negative Lookahead(?!(?:[^,()]*|(?:$[^)]*$))*$)

Non-Capturing Group(?:[^,()]*|(?:$[^)]*$))*

*repeats the group contents below any number of times:

1st Alternative[^,()]*

Negated Character Class[^,()]*

*matches any number of characters outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

2nd Alternative(?:$[^)]*$)

Non-Capturing Group(?:$[^)]*$)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^)]*

*matches any number of characters outside the set below:

)the literal ) (41₁₀ / 51₈ / 29₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

$end of line

.*any character (except for line terminators), repeated any number of times

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?!(?:[^,()]*|(?:\([^)]*\)))*$).*$

Test String
New

foobar
foo,bar
foo(xx,yy)bar
foo(xx,yy),baz
foo,(xx,yy)qux

a,b,c,d{
   a,b(c,  d),e    {  
a,(b,c),d{
a , bwefbfrew{
a,:is(b,c)s ss:is(b,c)sssss{
wefewfew,fewf{
fwafaewa,(b,c){

wefwefewfee{
(a,b,c,d)eeeeee(few)eeee{
ewfeweew{
wafewaf(s)ewfewew(){
afewfe(s,)wfew{
fef ewee{
a sefe few:has(few,few){
aafew:has(few,fewf,few){

span:is(p, b, a),da{

Regular Expression

Test StringNew

Test String
New