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Background shorthand


From:

CSS Web Site Design

with Eric Meyer

Video: Background shorthand

So what we've seen for the last 2 videos is was ways of placing an image into the background of an element and changing how its positioned, how it's repeated. All that has left us with, if you look at the CSS, is something, it's honestly a little reverse and kind of repetitive, it's background color, background image, background repeat, background position. It would be really nice if this were all expressible in a single property and fortunately it is.
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  1. 14m 34s
    1. Welcome
      28s
    2. What is CSS?
      5m 34s
    3. Design tour
      2m 38s
    4. Using the exercise files
      1m 20s
    5. Installing the Web Developer toolbar
      4m 34s
  2. 25m 54s
    1. XHTML essentials
      3m 55s
    2. CSS essentials
      5m 16s
    3. Embedded style sheets
      2m 20s
    4. Linking a style sheet
      2m 19s
    5. Linking to multiple style sheets
      2m 20s
    6. Using linked and embedded style sheets together
      4m 20s
    7. Using imported style sheets
      5m 24s
  3. 57m 44s
    1. ID selector essentials
      6m 38s
    2. Class selector essentials
      4m 8s
    3. Best practices for classes
      4m 52s
    4. Grouped selection
      4m 2s
    5. Descendant selectors
      6m 44s
    6. The sources of style
      6m 37s
    7. Specificity
      8m 20s
    8. Making things important
      4m 32s
    9. Inheritance essentials
      5m 12s
    10. Making things really unstyled
      4m 2s
    11. User style sheets
      2m 37s
  4. 39m 2s
    1. Box model essentials
      7m 34s
    2. Simple floating
      5m 3s
    3. Using float for layout
      5m 5s
    4. Fixing column drop
      5m 35s
    5. Clearing essentials
      4m 20s
    6. Float containment
      6m 35s
    7. Creating a navbar from a list
      4m 50s
  5. 38m 1s
    1. Coloring text
      4m 12s
    2. Defining color in CSS
      8m 12s
    3. Coloring backgrounds
      6m 35s
    4. Applying background images
      4m 19s
    5. Manipulating the direction of background images
      2m 52s
    6. Positioning backgrounds
      7m 23s
    7. Background shorthand
      4m 28s
  6. 58m 27s
    1. Altering line height
      7m 32s
    2. Font style and weight
      5m 45s
    3. Sizing fonts
      9m 59s
    4. Using font families
      10m 38s
    5. Font shorthand
      6m 5s
    6. Justifying text
      4m 56s
    7. Vertically aligning text
      4m 22s
    8. Transforming text
      3m 49s
    9. Text decoration
      5m 21s
  7. 44m 40s
    1. Margin essentials
      14m 21s
    2. Adding borders
      6m 52s
    3. Padding
      9m 17s
    4. Using negative margins
      7m 19s
    5. Margin collapsing
      6m 51s
  8. 20m 37s
    1. Styling tables and captions
      5m 22s
    2. Styling table cells
      6m 30s
    3. Styling a column with classes
      4m 51s
    4. Styling links inside table cells
      3m 54s
  9. 30m 38s
    1. Styling for specific mediums
      4m 3s
    2. Creating a print style sheet
      6m 35s
    3. Hiding layout for print
      4m 11s
    4. Styling for print
      6m 34s
    5. Complex styling for print
      4m 36s
    6. Creating a footer
      4m 39s
  10. 37m 22s
    1. Getting started
      1m 11s
    2. Setting global styles
      4m 4s
    3. Defining masthead and navbar colors
      3m 27s
    4. Layout of the navlink bar
      3m 38s
    5. Using columns
      4m 49s
    6. Setting content styles
      1m 53s
    7. Creating the sidebar boxes
      5m 41s
    8. Creating the sidebar form
      3m 23s
    9. Completing the sidebar
      3m 29s
    10. Making a table
      3m 12s
    11. Creating a footer
      2m 35s
  11. 1m 28s
    1. Goodbye
      1m 28s

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Watch the Online Video Course CSS Web Site Design
6h 8m Intermediate Sep 12, 2006

Viewers: in countries Watching now:

CSS gives Web designers control over the appearance of their web sites by separating the visual presentation from the content. It lets them easily make minor changes to a site or perform a complete overhaul of the design. In CSS Web Site Design, instructor and leading industry expert Eric Meyer reviews the essentials of CSS, including selectors, the cascade, and inheritance. The training also covers how to build effective navigation, how to lay out pages, and how to work with typography, colors, backgrounds, and white space. Using a project-based approach, Eric walks through the process of creating a Web page, while teaching the essentials of CSS along the way. By the end of the training, viewers will have the tools to master professional site design. Exercise files accompany the training videos.

Subject:
Web
Software:
CSS
Author:
Eric Meyer

Background shorthand

So what we've seen for the last 2 videos is was ways of placing an image into the background of an element and changing how its positioned, how it's repeated. All that has left us with, if you look at the CSS, is something, it's honestly a little reverse and kind of repetitive, it's background color, background image, background repeat, background position. It would be really nice if this were all expressible in a single property and fortunately it is.

So we'll join all this stuff up and get rid of the color part and just leave myself with background, RGB 85%, 85%, 85% URL of the image I want to use, here's the repeat, here's the position and if I save that, and reload, there's a difference because that's exactly equivalent to what I just had, with all the individual values listed out one by one and the individual properties listed out one by one. This is background as a shorthand, it's a shorthand for that other thing that we saw before. Now, the thing about background as a shorthand is that the order that these things go in, mostly doesn't matter with one exception. So if I decided that I didn't want my color, if I think it makes more sense to have the color at the end, so that I say, here's the image, here is the image repetition, here's where the origin image gets placed and then here's the background color, is sort of fall back if my image doesn't show up. You can write it that way, that's fine.

The in which these are it doesn't matter except for the background position. So, if you have 00, or if we had a 50% 75%, those have to stay together and they have to be in the order horizontal and then vertical just like they do with background position, because basically what you do is you are taking the value from each of those background image, background position, background color and you're putting them all into this background shorthand property, and you can put them in whatever order you want, but you can't like split them up and I can't take the background position values and just split them up and put them wherever you want and expect the browser to know what you want to do.

So we could at this point, change the way this is setup, so that we have the image but it's not repeated and it's placed halfway across the element and three quarters of the way down and we're going to actually drop out the blue in our background color so that we get sort of a yellow. There you go, that's what we got by doing that. If I take these and move them around and I try to improve the color a bit, because wow, that ever hurt, then, there you have that.

There's background, is basically a way of shortening things up so you don't have to write out every single one of the properties and values. There's one thing that you do want to watch out for though and that is, that if you leave out any of these, if I were to say background, URL blah, 50% 75% RGB 85%, 85%, 60%, I didn't say anything about background repeat so it's set to its default, which in fact is repeat, so having done that, even though know I didn't say anything about repetition, it's going to be fully repeated throughout the background of the element.

Similarly, if I don't say anything about the background position, then it's going to default to the top left. If I leave off a color, then it will default to transparent, which is, there won't be a color and if I don't include the URL for background image than there just won't be an image, because it will default to none. That is just something to watch out for with background and with shorthand properties in general. If you leave out a piece of the shorthand value, like in this case, background position or background repeat, the browser will just automatically fill in whatever the default is for the corresponding property.

So the default for backup position is 00, which is the top left corner. So if you don't say anything for the background positioning, in your background value, then 00, the default is what's going to be filled in. So that's background with the shorthand for you.

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