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jquery - Run ScrollTop with offset of element by ID

Trying to make the browser scroll to a specific ID with an added offset -

$('html, body').animate({scrollTop: $('#contact').offset().top}, 'slow');

What I need to do is to set the offset by -100px. How can I accomplish this?

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No magic involved, just subtract from the offset top of the element

$('html, body').animate({scrollTop: $('#contact').offset().top -100 }, 'slow');

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