regex101: Python Match Workspace

Explanation

Pro

(?i)applies the following effective flags to the remainder of the pattern: gi

i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters

<divthe literal text <div (case insensitive)

Positive Lookahead(?=(?:[^>\"']|\"[^\"]*\"|'[^']*')*?(?<=\s)class\s*=\s*(?:(['\"])\s*(col-xs-(?:(?!\1)[\S\s])*?)\s*\1))

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

*?repeats the group contents below any number of times:

1st Alternative[^>\"']

Negated Character Class[^>\"']

>the literal > (62₁₀ / 76₈ / 3E₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative\"[^\"]*\"

\"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^\"]*

*matches any number of characters outside the set below:

\"the literal " (34₁₀ / 42₈ / 22₁₆)

3rd Alternative'[^']*'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Negated Character Class[^']*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Positive Lookbehind(?<=\s)

\sa Unicode whitespace character

classthe literal text class (case insensitive)

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

=the literal = (61₁₀ / 75₈ / 3D₁₆)

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

Non-Capturing Group(?:(['\"])\s*(col-xs-(?:(?!\1)[\S\s])*?)\s*\1)

Group 1(['\"])

Character Class['\"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\"the literal " (34₁₀ / 42₈ / 22₁₆)

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

Group 2(col-xs-(?:(?!\1)[\S\s])*?)

col-xs-the literal text col-xs- (case insensitive)

Non-Capturing Group(?:(?!\1)[\S\s])*?

*?repeats the group contents below any number of times:

Negative Lookahead(?!\1)

\1the text saved by group 1

Character Class[\S\s]

\Sany character that is not Unicode whitespace

\sa Unicode whitespace character

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

\1the text saved by group 1

\s+a Unicode whitespace character, repeated at least once

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

+repeats the group contents below at least once:

1st Alternative\"\S\s]*?\"

\"the literal " (34₁₀ / 42₈ / 22₁₆)

\Sany character that is not Unicode whitespace

\sa Unicode whitespace character

]*?the literal ] (93₁₀ / 135₈ / 5D₁₆) , repeated any number of times

\"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative'\S\s]*?'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\Sany character that is not Unicode whitespace

\sa Unicode whitespace character

]*?the literal ] (93₁₀ / 135₈ / 5D₁₆) , repeated any number of times

'the literal ' (39₁₀ / 47₈ / 27₁₆)

3rd Alternative[^>]*?

Negated Character Class[^>]*?

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

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Global pattern flags

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

Quick Reference

25 tokens

Regular Expression

(?i)<div(?=(?:[^>\"']|\"[^\"]*\"|'[^']*')*?(?<=\s)class\s*=\s*(?:(['\"])\s*(col-xs-(?:(?!\1)[\S\s])*?)\s*\1))\s+(?:\"\S\s]*?\"|'\S\s]*?'|[^>]*?)+>

Unit Tests

There are no unit tests.