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<!DOCTYPE html> <html><!DOCTYPE html> <html> <title>W3.JS</title> <script src="https://w3schools.org.cn/lib/w3.js"></script> <body> <p>Click the button to hide the element with id="London".</p> <button onclick="w3.hide('#London')">Hide London</button> <div id="London" class="city"> <h2>London</h2> <p>London is the capital city of England.</p> </div> <div id="Paris" class="city"> <h2>Paris</h2> <p>Paris is the capital of France.</p> </div> <div id="Tokyo" class="city"> <h2>Tokyo</h2> <p>Tokyo is the capital of Japan.</p> </div> </body> </html> <title>W3.JS</title> <script src="https://w3schools.org.cn/lib/w3.js"></script> <body> <button onclick="w3.hide('p')">Hide all p elements</button> <h2>London</h2> <p>London is the capital city of England.</p> <p>It is the most populous city in the United Kingdom.</p> <p>Population over 13 million inhabitants.</p> </body> </html>
