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Regex Cheat Sheet/Word boundary

Match a transition between word and non-word characters.

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Section: Anchors and Boundaries

Word boundary

regex
regex
\b
Explanation

Common for matching whole words like `\berror\b`.

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Same sheet · prioritizing Anchors and Boundaries
Non-word boundary
Match where a word boundary does not occur.
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Start of string
Match only at the beginning of the input.
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End of string
Match only at the end of the input.
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Absolute start anchor
Match only at the absolute start of the entire string.
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Absolute end anchor
Match only at the absolute end of the entire string.
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Word character
Match a word character.
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