level 1
framework defination：
bootstrap file structure:
Adding bootstrp to our html:
bootstrap relays on jquery, so we also need to add jquery inside out page
The container class
the container-fluid class
practice code:
<!DOCTYPE html> <html> <head> <title>Blasting Off With Bootstrap</title> <link href='css/main.css' rel='stylesheet'> <link href='css/bootstrap.min.css' rel = 'stylesheet'> </head> <body> <div class='container'> <h1>The Fastest Way to Space</h1> <p>Make your way to space in the comfort of your own rocket, elevator or transporter.</p> <button type='button'>Take the Tour</button> <button type='button'>Book Tickets Now</button> </div> <p>This is our footer</p> <script src ='//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js'></script> <script src ='js/bootstrap.min.js'></script> </body> </html>