Regular Expressions 101

1st Alternative<head>[\w\W]*?<\/head>

<head>the literal text <head> (case sensitive)

Character Class[\w\W]*?

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

\wany word character

\Wany non-word character

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

head>the literal text head> (case sensitive)

2nd Alternative<\/?(?:html|body|span)(?: \w+="[\w\W]+?")*>

<the literal < (60₁₀ / 74₈ / 3C₁₆)

\/?optionally matches the literal / (47₁₀ / 57₈ / 2F₁₆)

Non-Capturing Group(?:html|body|span)

1st Alternativehtml

htmlthe literal text html (case sensitive)

2nd Alternativebody

bodythe literal text body (case sensitive)

3rd Alternativespan

spanthe literal text span (case sensitive)

Non-Capturing Group(?: \w+="[\w\W]+?")*

*repeats the group contents below any number of times:

the literal (32₁₀ / 40₈ / 20₁₆)

\w+any word character, repeated at least once

="the literal text ="

Character Class[\w\W]+?

+?matches at least one character from the set below:

\wany word character

\Wany non-word character

"the literal " (34₁₀ / 42₈ / 22₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

3rd Alternative\s?(?:class|style|id)="[\w\W]+?"

\s?optionally matches any whitespace character

Non-Capturing Group(?:class|style|id)

1st Alternativeclass

classthe literal text class (case sensitive)

2nd Alternativestyle

stylethe literal text style (case sensitive)

3rd Alternativeid

idthe literal text id (case sensitive)

="the literal text ="

Character Class[\w\W]+?

+?matches at least one character from the set below:

\wany word character

\Wany non-word character

"the literal " (34₁₀ / 42₈ / 22₁₆)

Global pattern flags

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

No unit tests · Add a test to get started

26 tokens

Regular Expression

(?:<head>[\w\W]*?<\/head>|<\/?(?:html|body|span)(?: \w+="[\w\W]+?")*>|\s?(?:class|style|id)="[\w\W]+?")

Unit Tests

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