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CSS3 First Look

Basing media queries on page orientation


From:

CSS3 First Look

with James Williamson

Video: Basing media queries on page orientation

Before we focus on the specific needs of iOS devices, I want to take a moment to discuss basing styles off of device orientation. It's very common now for devices such as the iPad to change displays based on the orientation of the device itself. Let's take a look at how we can respond to that with media queries. So I have the tours.htm from the 08_05 folder. Pretty much the same thing we've got going on and we have sort of removed the mobile device style sheet so we can just kind of play around with their tablet styles. And what I'm going to do is change my media query.
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  1. 3m 5s
    1. Welcome
      1m 20s
    2. Using the exercise files
      1m 45s
  2. 31m 30s
    1. What is CSS3?
      5m 26s
    2. The current status of CSS3
      3m 35s
    3. An overview of CSS3 capabilities
      2m 24s
    4. Can you use CSS3 now?
      5m 31s
    5. Detecting support for CSS3
      9m 0s
    6. Understanding vendor prefixes
      5m 34s
  3. 1h 9m
    1. An overview of child and sibling selectors
      3m 11s
    2. Using child and sibling selectors
      7m 17s
    3. An overview of attribute selectors
      3m 19s
    4. Using attribute selectors
      8m 32s
    5. Pseudo-class UI selectors
      5m 56s
    6. Negation pseudo-class selectors
      6m 48s
    7. Target pseudo-class selectors
      5m 39s
    8. Structural selectors
      3m 58s
    9. Nth-child selector syntax
      10m 0s
    10. First, last, and only structural selectors
      5m 39s
    11. Using structural selectors to write more efficient code
      8m 52s
  4. 45m 28s
    1. Color formats in CSS3
      7m 9s
    2. Transparency in CSS3
      9m 10s
    3. CSS3 gradients
      4m 11s
    4. Creating linear gradients
      13m 57s
    5. Creating radial gradients
      11m 1s
  5. 49m 8s
    1. Working with web fonts
      6m 38s
    2. @font-face syntax
      4m 52s
    3. Downloading sample fonts
      6m 5s
    4. Writing @font-face declarations
      7m 57s
    5. Using web fonts
      6m 42s
    6. Using text shadows
      7m 14s
    7. Creating multi-column text
      9m 40s
  6. 50m 55s
    1. An overview of the flexible box model
      4m 42s
    2. Controlling box orientation
      5m 2s
    3. Setting element flexibility
      12m 59s
    4. Distributing boxes
      7m 54s
    5. Controlling box alignment
      12m 38s
    6. Working with box-sizing
      7m 40s
  7. 1h 5m
    1. Using border-radius
      6m 20s
    2. Creating custom rounded corners
      10m 21s
    3. Understanding border images
      5m 15s
    4. Using border images
      8m 52s
    5. Creating box shadows
      8m 58s
    6. CSS3 backgrounds
      4m 55s
    7. Controlling background size
      8m 46s
    8. Creating multiple background images
      6m 4s
    9. Using background-origin
      3m 18s
    10. Clipping background content
      3m 2s
  8. 40m 8s
    1. An overview of CSS3 2D transforms
      4m 26s
    2. Using 2D transforms
      8m 16s
    3. Setting transform origins
      5m 24s
    4. An overview of CSS3 transitions
      5m 0s
    5. Animating CSS properties
      6m 12s
    6. Using easing in animations
      5m 41s
    7. An overview of 3D transforms
      5m 9s
  9. 37m 56s
    1. Understanding media queries
      6m 18s
    2. Strategies for targeting multiple devices
      6m 4s
    3. Writing styles for target screen sizes
      12m 11s
    4. Deploying styles through media queries
      3m 55s
    5. Basing media queries on page orientation
      2m 24s
    6. Targeting media queries for iOS devices
      7m 4s
  10. 1m 6s
    1. Goodbye
      1m 6s

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CSS3 First Look
6h 34m Appropriate for all Nov 29, 2010

Viewers: in countries Watching now:

In CSS3 First Look, staff author James Williamson provides an in-depth introduction to the newest CSS standard, detailing its modular format, history, and current level of browser support, while also demonstrating its capabilities and applications. The course includes tutorials on using new selectors, modifying typography and color, working with the box model, and understanding media queries. Exercise files accompany the course.

Topics include:
  • Understanding the history of CSS3
  • Working with the new selectors
  • Adding transparency and gradients
  • Specifying web fonts with @font-face
  • Understanding the advances to page layout
  • Looking at CSS3 box model capabilities
  • Using 2D and 3D transforms
  • Understanding media queries
Subject:
Web
Software:
CSS
Author:
James Williamson

Basing media queries on page orientation

Before we focus on the specific needs of iOS devices, I want to take a moment to discuss basing styles off of device orientation. It's very common now for devices such as the iPad to change displays based on the orientation of the device itself. Let's take a look at how we can respond to that with media queries. So I have the tours.htm from the 08_05 folder. Pretty much the same thing we've got going on and we have sort of removed the mobile device style sheet so we can just kind of play around with their tablet styles. And what I'm going to do is change my media query.

I'm going to remove the sort of minimum and maximum width and what I'm going to do is replace this minimum width into this media query function. I'm just going to pass in orientation:portrait. So obviously we have two keywords here and we have portrait and landscape. Now my landscape orientation is going to be my main styles, the big ones. Only when it gets into that smaller screen size, portrait if you will, would have served up the other one. Now this is not exactly how I would do this.

It's really just sort of just showing you how the orientation keyword works. Essentially, if you wanted to really customize your layout for tablet devices, you could serve up two tablet-oriented layouts. One for landscape and one for portrait and this is one of the ways that you could filter which one gets sent to that particular device. Let's test it out. So if I save this and just preview this say in Chrome, you'll notice that when the aspect ratio of my screen is wider than it's taller, I receive the landscape and if I shrink it down so that the actual screen size is taller than it is wider, there it is, I get my portrait styles. Really cool, right? Now it's really tempting to use those.

I mean it is really tempting to use them, but you need to understand that not all devices currently support it. In fact right now it's supported by Android, Firefox, and WebKit, except for some reason the iPhone oddly enough. So it will work with some mobile devices, but not all of them. So as the implementations evolve on this, this is going to be a very useful technique for creating separate portrait and landscape versions of your site. So be sure to keep an eye on how support for this evolves, especially within the mobile world, if you want to really get that level of specificity of creating layouts that look one way on landscape and one way on portrait.

Find answers to the most frequently asked questions about CSS3 First Look.


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Q: I'm following along with the video "Transparency in CSS3".  James shows us how to achieve transparency in Internet Explorer by going to Kimili.com and entering a HSLA value to generate code for transparency.

Here that code:

background: transparent;-ms-filter: "progid:DXImageTransform.Microsoft.gradient(startColorstr=#BF0E0C0B,endColorstr=#BF0E0C0B)"; /* IE8 */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#BF0E0C0B,endColorstr=#BF0E0C0B); /* IE6 & 7 */ zoom: 1;

When this code is added to my HTML file it removes transparency on browsers that do in fact support it. So I'm left with NO transparency. Why?
A: The problem is in the filter code. If the IE background is called last, the first "transparent" declaration will remove all previous colors, regardless of browser. To resolve this, place the rule inside a conditional comment for IE or remove the "transparent" declaration at the front of the rule.
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