Run ❯
Get your
own
website
❯
Run Code
Ctrl+Alt+R
Save Code
Ctrl+Alt+A
Change Orientation
Ctrl+Alt+O
Change Theme
Ctrl+Alt+D
Go to Spaces
Ctrl+Alt+P
<!DOCTYPE html> <html> <body> <h1>The HTMLCollection Object</h1> <h2>The length Property</h2> <p>Click "Change" to change all elements with class="myclass":</p> <button onclick="myFunction()">Change</button> <p>I am a paragraph.</p> <p class="myclass">I am a paragraph.</p> <p class="myclass">I am a paragraph.</p> <script> function myFunction() { const collection = document.getElementsByClassName("myclass"); for (let i = 0; i < collection.length; i++) { collection[i].style.fontSize = "24px"; } } </script> </body> </html>
