Regular Expressions 101

Non-Capturing Group(?:^|(?:['"]\s))

1st Alternative^

^start of line

2nd Alternative(?:['"]\s)

Non-Capturing Group(?:['"]\s)

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

\sany whitespace character

Group 1(\w+)

\w+any word character, repeated at least once

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

=the literal = (61₁₀ / 75₈ / 3D₁₆)

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

Group 2(['"])

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 3([\w\s(?:\\(?!\2))]+)

Character Class[\w\s(?:\\(?!\2))]+

+matches at least one character from the set below:

\wany word character

\sany whitespace character

(the literal ( (40₁₀ / 50₈ / 28₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

(the literal ( (40₁₀ / 50₈ / 28₁₆)

?the literal ? (63₁₀ / 77₈ / 3F₁₆)

!the literal ! (33₁₀ / 41₈ / 21₁₆)

\2the literal (2₈ / 2₁₀ / 2₁₆)

)the literal ) (41₁₀ / 51₈ / 29₁₆)

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

(?:^|(?:['"]\s))(\w+)\s*=\s*(['"])([\w\s(?:\\(?!\2))]+)

New

attr1="val\"1\"" attr2="val2a val2b"