Manipulating CSS and HTML with RegEx

Searching

This pattern will find all HTML elements with no children:

<([a-z]+)[ ]?[^<>]*[>][^<>]*</\1>

This pattern will find all HTML elements with self closing tags:

<[a-z]+[ ]?[^<>]*[ ]/>

Manipulating

HTML

You can use this pair of patterns to remove the "class" attribute of all HTML elements (or swap the word "class" for any other attribute's name):

Find

(<[^>]+)[ ]class="\w+"

Replace

$1

You can use this pair of patterns to remove all attributes of all HTML elements:

Find

(<\w+)[ ][^>/]+(?=/?>)

Replace

$1

CSS

This pair of patterns will shorten hexadecimal color values that qualify:

Find

#([0-9A-Fa-f])\1([0-9A-Fa-f])\2([0-9A-Fa-f])\3

Replace

#$1$2$3

This pair of patterns will remove the unit from values of zero:

Find

\b0(?:px|%|em|pt|in|pc)

Replace

0