<!DOCTYPE html> <html> <title>W3.CSS</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css"> <body> <div class="w
<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@4.6.2/dist/css/bootstrap.min.css"> <script...
iframe框根据内容自适应高度(100%可用) HTML: <iframe id="iframe" src="自己写地址" name="conten...
</p> <p>We have also added a media query for screens that are 400px or less, which will vertically stack and center the navigation links.</p> <h3>Resize the browser window to see the effect.</h3> </div> </body> </html> ...
w3-rightbarAdds a thick right border to an element w3-topbarAdds a thick top border to an element Adding Borders Thew3-borderclasses are used to add borders to any HTML element: I have borders. I have only a left border. I have top and bottom borders. ...
<html> <title>W3.CSS</title> <metaname="viewport"content="width=device-width, initial-scale=1"> <linkrel="stylesheet"href="https://www.w3schools.com/w3css/5/w3.css"> <linkrel="stylesheet"href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"> ...
</p> <p>Only when the button is clicked, the navigation bar will be displayed.</p> <p>Tip: You can also remove the .navbar-expand-md class to ALWAYS hide navbar links and display the toggler button.</p> </div> </body> </html> ...