Positive lookahead

(?=...)

Matches the given subpattern without consuming characters

Examples

Match Sample:

foobar foobaz

Regex Example:

foo(?=bar)

PCRE JAVASCRIPT PYTHON

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<!-- Embed Regex Token: (?=...) -->
<code class="regex-token">(?=...)</code> - Positive lookahead
<small><a href="https://testregex.com/cheatsheet/positive-lookahead">See details</a></small>