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<!DOCTYPE html> <html> <head> <style> p:first-child { background-color: yellow; } </style> </head> <body> <h1>Demo of :firstchild</h1> <p>This paragraph is not the first child of its parent (body).</p> <p>This paragraph is not the first child of its parent (body).</p> <div> <p>This paragraph is the first child of its parent (div).</p> <p>This paragraph is not the first child of its parent (div).</p> </div> </body> </html>
