How to get the distance from the beginning of the block to the beginning of the document?

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    Let's say there is a trace structure:
    <html>
    <body>
    <div class="block"></div>
    <div class="block"></div>
    <div class="block"></div>
    </body>
    <footer>
        <div class="footer-block"></div>
        <div class="footer-block-2"></div>
        <div class="footer-block"></div>
    </footer>
    </html>


    You need to find out how many pixels are from footer-block-2 to the beginning of the document, that is, html;
    The block is always static in relation to the document.
    JavaScript Anonymous, Feb 4, 2020

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