[feature] Extract html attribute and make it available as a token for notification about changedetection.io HOT 3 OPEN

Yes - I was thinking that you should be able to query the HTML in the "notification body" since it can also use Jinja2 templating

for example - the template could be

<h1>Page changed!</h1>
{{ query("//a@href") }}

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It should save the HTML on each fetch too

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Saw this as well as a reddit post but still new to how you would use the jinja templates from the crawled elements or multiple elements to display in a notification. Could we have a wiki article to document how this would work?

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