Regular Expressions 101

Explanation

Pro

^start of line

ifthe literal text if (case sensitive)

+the literal (32₁₀ / 40₈ / 20₁₆) , repeated at least once

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Negated Character Class[^{]*

*matches any number of characters outside the set below:

{the literal { (123₁₀ / 173₈ / 7B₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Positive Lookahead(?= *\{)

*the literal (32₁₀ / 40₈ / 20₁₆) , repeated any number of times

\{the literal { (123₁₀ / 173₈ / 7B₁₆)

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.

26 tokens

^if +\([^{]*\)(?= *\{)

New

if (bla === 3) {
}
if ((((ol === 1 || (true))))) {}
if ((1 === 4)
(this === 9)) {}