hugo/docs/content/en/functions/findRe.md

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findRE	Returns a slice of strings that match the regular expression.	functions	docs parent functions	regex	findRE PATTERN INPUT [LIMIT] strings.FindRE PATTERN INPUT [LIMIT]	findRESubmatch replaceRE

By default, findRE finds all matches. You can limit the number of matches with an optional LIMIT argument.

{{% readfile file="/functions/common/regular-expressions.md" %}}

This example returns a slice of all second level headings (h2 elements) within the rendered .Content:

{{ findRE `(?s)<h2.*?>.*?</h2>` .Content }}

The s flag causes . to match \n as well, allowing us to find an h2 element that contains newlines.

To limit the number of matches to one:

{{ findRE `(?s)<h2.*?>.*?</h2>` .Content 1 }}

{{% note %}} You can write and test your regular expression using regex101.com. Be sure to select the Go flavor before you begin. {{% /note %}}