HTML5 Bootstrap study notes 2_html/css_WEB-ITnose

navbar upgrade from Bootstrap 2 to Bootstrap 3

1. .navbar-inner has been removed from Bootstrap 3.

2.

should become
.

Reference materials:

CSS display:table attribute usage analysis http://developer.51cto.com/art/201009/226678.htm

Twitter Bootstrap 3 - Navbar not horizontal http://stackoverflow.com/questions/18191177/twitter-bootstrap-3-navbar-not-horizontal

Bootstrap navbar http://getbootstrap.com/components/# navbar

viewport

Mobile browsers place the page in a virtual "window" (viewport). Usually this virtual "window" (viewport) is smaller than The screen is wider so that instead of squeezing each web page into a tiny window (which would break the layout of web pages that are not optimized for mobile browsers), users can pan and zoom to see different parts of the web page. The mobile version of Safari browser recently introduced the viewport meta tag, which allows web developers to control the size and zoom of the viewport. Other mobile browsers also basically support it.

A commonly used viewport meta tag for a page optimized for mobile web pages is roughly as follows:

1 <meta name=”viewport” content=”width=device-width, initial-scale=1, maximum-scale=1″>

width: controls the size of the viewport , you can specify a value, such as 600, or a special value, such as device-width, which is the width of the device (units are CSS pixels when scaling to 100%).
Height: Corresponding to width, specify the height.
initial-scale: The initial scaling ratio, that is, the scaling ratio when the page is loaded for the first time.
maximum-scale: The maximum scale the user is allowed to zoom to.
minimum-scale: The minimum scale to which the user is allowed to zoom.
user-scalable: whether the user can manually zoom

Reference materials:

HTML meta viewport attribute description

viewport for mobile front-end development In-depth understanding

Understanding viewport and device-width http://www.xiaocaoge.com/understanding-viewport-and-device-width.html?utm_source=tuicool

Twitter Bootstrap: Responsive CSS does not work on mobile devices (solve the problem that Bootstrap mobile terminal cannot respond) http://julienrenaux.fr/2013/03/01/twitter-bootstrap-responsive-does-not-work-on-mobile-devices/