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<!DOCTYPE html> <html> <head> <style> h1 { margin: 0 0 50px 0; } h2 { margin: 20px 0 0 0; } </style> </head> <body> <p>In this example the h1 element has a bottom margin of 50px and the h2 element has a top margin of 20px. So, the vertical margin between h1 and h2 should have been 70px (50px + 20px). However, due to margin collapse, the actual margin ends up being 50px.</p> <h1>Heading 1</h1> <h2>Heading 2</h2> </body> </html>
