[feature] Extract text from pseudo Elements

[achimcc]

Version and OS For example, 0.123 on linux/docker

Is your feature request related to a problem? Please describe. A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]

Describe the solution you'd like

I want to alert on divs which I want to filter by the content of ::after pseudo elements. The following element should trigger an Alert for the text "Danke!":

Currently the content of those pseudo elements seems to get ignored by changedetection.io

Many thanks in advance!

Describe the use-case and give concrete real-world examples Attach any HTML/JSON, give links to sites, screenshots etc, we are not mind readers

Additional context