Regular Expressions 101

Pro

^start of line

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

pipethe literal text pipe (case sensitive)

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

\na line-feed (newline) character (ASCII 10)

\s*any whitespace character, repeated any number of times

catchErrorthe literal text catchError (case sensitive)

Group 1([\w\W]*?\}\))

Character Class[\w\W]*?

*?matches any number of characters from the set below:

\wany word character

\Wany non-word character

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\na line-feed (newline) character (ASCII 10)

\s*any whitespace character, repeated any number of times

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

\s*any whitespace character, repeated any number of times

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

subscribethe literal text subscribe (case sensitive)

Group 2([\w\W]*?\}\))

Character Class[\w\W]*?

*?matches any number of characters from the set below:

\wany word character

\Wany non-word character

\}the literal } (125₁₀ / 175₈ / 7D₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

$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

s modifier: single line. Allows a dot to match line terminators

Detailed match information will be displayed here automatically.

25 tokens

^\.pipe\(\n\s*catchError([\w\W]*?\}\))\n\s*\)\s*\.subscribe([\w\W]*?\}\));$

New

.pipe(
     catchError((err) => {
       ...
     })
     )
     .subscribe((res) => {
       ...
     });