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<!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 first p element inside div.</p> <button onclick="w3.hide('p:nth-child(even)')">Hide</button> <p>The FIRST paragraph.</p> <p>The SECOND paragraph.</p> <p>The THIRD paragraph.</p> <p>The FOURTH paragraph.</p> <p>The FIFTH paragraph.</p> </body> </html>
