Regex to parse HTML attribute/value pairs.

readme

This regex parses attributes from their values such as those in HTML elements. It returns the attribute
names and their values even when the quotes are escaped, nested, or omitted.

The following are examples attribute/value pairs that are properly divided:

    a="a" b="b b" c='c' d=1 e="escaped \" quotes" f="'nested quotes'" g = 'gaps'   h="multiple spaces"

The attribute name will be in match position 0, while the value will be in either position 4 or 5
depending on whether or not the value is quoted.

For unquoted values (such as attribute d above) match position 4 will be blank and the value will be
in position 5. Otherwise, the value will be in position 3. This could be normalized with some
additional work but would make the expression complicated for my needs.

    (\w*) *= *((['"])?((\\\3|[^\3])*?)\3|(\w+))

Here's the regex at play:

https://www.regextester.com/?fam=132501