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CSS: Core Concepts

Dealing with browser inconsistencies


From:

CSS: Core Concepts

with James Williamson

Video: Dealing with browser inconsistencies

Although every browser has its own set of quirks and bugs, you're probably going to spend more time dealing with Internet Explorer's bugs and specific issues than with any other browser. Now due to Explorer's large user base, you usually don't have the option of simply ignoring it and hoping that users will simply use a more standards-compliant browser. I mean, to be honest, Internet Explorer 9 is fairly standards-compliant. It's a really excellent browser, but there are still a large portion of users out there still using earlier versions, so what this all boils down to is that you simply have to have a site-wide strategy for dealing with Internet Explorer's quirks.
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  1. 4m 57s
    1. Welcome
      55s
    2. Using the exercise files
      4m 2s
  2. 1h 7m
    1. Exploring default styling
      4m 56s
    2. CSS authoring tools
      2m 29s
    3. CSS syntax
      4m 45s
    4. Writing a selector
      4m 10s
    5. Setting properties
      8m 40s
    6. Common units of measurement
      7m 47s
    7. Inline styles
      5m 1s
    8. Embedded styles
      5m 19s
    9. Using external style sheets
      10m 34s
    10. Checking for browser support
      8m 48s
    11. Dealing with browser inconsistencies
      5m 30s
  3. 2h 15m
    1. Structuring HTML correctly
      2m 51s
    2. Element selectors
      4m 52s
    3. Class selectors
      6m 4s
    4. ID selectors
      3m 27s
    5. Using classes and IDs
      10m 7s
    6. Element-specific selectors
      4m 35s
    7. The universal selector
      5m 42s
    8. Grouping selectors
      4m 49s
    9. Descendent selectors
      7m 32s
    10. Child selectors
      5m 7s
    11. Adjacent selectors
      5m 30s
    12. Attribute selectors
      12m 43s
    13. Pseudo-class selectors
      3m 54s
    14. Dynamic pseudo-class selectors
      8m 29s
    15. Structural pseudo-class selectors
      6m 45s
    16. Nth-child selectors
      13m 10s
    17. Pseudo-element selectors
      12m 40s
    18. Targeting page content: Lab
      8m 56s
    19. Targeting page content: Solution
      7m 59s
  4. 42m 39s
    1. What happens when styles conflict?
      4m 0s
    2. Understanding the cascade
      5m 47s
    3. Using inheritance
      6m 11s
    4. Selector specificity
      6m 55s
    5. The !important declaration
      4m 5s
    6. Reducing conflicts through planning
      3m 33s
    7. Resolving conflicts: Lab
      6m 45s
    8. Resolving conflicts: Solution
      5m 23s
  5. 1h 47m
    1. Setting a font family
      7m 10s
    2. Using @font-face
      9m 18s
    3. Setting font size
      7m 35s
    4. Font style and font weight
      6m 52s
    5. Transforming text
      3m 58s
    6. Using text variants
      2m 49s
    7. Text decoration options
      4m 26s
    8. Setting text color
      3m 2s
    9. Writing font shorthand notation
      8m 49s
    10. Controlling text alignment
      6m 33s
    11. Letter and word spacing
      9m 11s
    12. Indenting text
      4m 30s
    13. Adjusting paragraph line height
      10m 30s
    14. Controlling the space between elements
      6m 41s
    15. Basic text formatting: Lab
      8m 45s
    16. Basic text formatting: Solution
      7m 14s
  6. 2h 1m
    1. Understanding the box model
      16m 53s
    2. Controlling element spacing
      14m 29s
    3. Controlling interior spacing
      10m 49s
    4. Margin and padding shorthand notation
      6m 27s
    5. Adding borders
      8m 57s
    6. Defining element size
      10m 7s
    7. Creating rounded corners
      6m 58s
    8. Background properties
      2m 51s
    9. Using background images
      5m 10s
    10. Controlling image positioning
      10m 25s
    11. Using multiple backgrounds
      7m 5s
    12. Background shorthand notation
      5m 25s
    13. Styling container elements: Lab
      7m 55s
    14. Styling container elements: Solution
      8m 17s
  7. 47m 51s
    1. Color keyword definitions
      5m 4s
    2. Understanding hexadecimal notation
      6m 5s
    3. Using RGB values
      4m 58s
    4. Using HSL values
      5m 17s
    5. Working with opacity
      2m 23s
    6. Using RGBa and HSLa
      3m 8s
    7. Styling drop shadows
      5m 38s
    8. CSS gradients
      6m 32s
    9. Working with color: Lab
      4m 26s
    10. Working with color: Solution
      4m 20s
  8. 1m 58s
    1. Additional resources
      1m 58s

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CSS: Core Concepts
8h 49m Beginner Nov 22, 2011

Viewers: in countries Watching now:

In this hands-on course, James Williamson demonstrates the concepts that form the foundation of Cascading Style Sheets (CSS), including styling text, adding margins and padding, and controlling how images display. The course also explores the tools needed to work with CSS, the differences between embedded and external styles, how to use selectors to target elements, and what to do when styles conflict.

Topics include:
  • Exploring default styling
  • Writing a selector
  • Setting properties
  • Working with common units of measurement, including ems and pixels
  • Structuring HTML correctly
  • Understanding the cascade and inheritance
  • Setting a font family, font size, text color, and more
  • Understanding the box model
  • Styling container elements
  • Working with RGB vs. HSL values
  • Styling drop shadows
Subject:
Web
Software:
CSS
Author:
James Williamson

Dealing with browser inconsistencies

Although every browser has its own set of quirks and bugs, you're probably going to spend more time dealing with Internet Explorer's bugs and specific issues than with any other browser. Now due to Explorer's large user base, you usually don't have the option of simply ignoring it and hoping that users will simply use a more standards-compliant browser. I mean, to be honest, Internet Explorer 9 is fairly standards-compliant. It's a really excellent browser, but there are still a large portion of users out there still using earlier versions, so what this all boils down to is that you simply have to have a site-wide strategy for dealing with Internet Explorer's quirks.

Before going too deep into developing a browser strategy, I want you to introduce you to positioniseverything. You can find this site at positioniseverything.net. Now, this site consists primarily of older information, but it is still the go- to guide on browser bugs and ways around those bugs, and it has a primary focus on Internet Explorer. So if you're new to CSS, reading through these past articles will give you a solid foundation into browser and standards development over time and how to address browser bugs.

While most browser bugs have fixes that you can use and those are often referred to as hacks, those hacks aren't necessarily a good idea. Often fixing a bug in one version can actually trigger an error in another version. Now for the most part, they add extra weight to your code, and they can make maintaining your site difficult, especially in a team environment where keeping track of when and where hacks are being used can be really, really difficult. More importantly, they can cause problems with future versions of browsers as well. Now, if all this seems rather maddening, it's because it is.

Learning about and dealing with various browser-CSS-related issues is one of the most vexing but necessary things that you're ever going to do as a web designer. And there are various ways of dealing with Internet-Explorer-specific issues, and I can't recommend strong enough researching and learning as many cross-browser-compatibility issues as possible. Doing so will help shape and guide your overall browser-compatibility strategy. In the end the strategy that you use will depend on the browsers and browser versions that you need to support. And while I can't say that there is any one perfect strategy to use, I can discuss the ones that I use when approaching browser inconsistencies. It's the result of many years of dealing with bugs and my own personal focus on generating clean, maintainable code.

First, I try very, very hard to avoid using hacks. Now, a browser hack usually consists of a really odd-looking selector or rules written in a way that one browser will interpret it and render it, while the remaining browsers just ignore it or even overwrite the hack. Rather than use hacks, I try to avoid design issues that trigger browser errors altogether. Now to illustrate this, I want to go back to IE 6. In Internet Explorer 6 if you floated an element to one direction and also placed a margin on the same side, IE 6 would double the margin value.

While there was a way to solve this, I chose to simply never apply a margin in the same direction as a float. That way I avoided the invalid code required to fix it, while never triggering the bug. It's a habit that I still stubbornly cling to today, even though it is no longer necessary. That means that you have to be diligent in learning all you can about browser bugs and how they're triggered, so that you can avoid them when possible. Once you understand the various browsers and their issues, you'll find that you start designing with them in mind.

This may seem limiting, but in reality, you can do anything you want visually and stay within those browser constraints. Next, if I have to deal with IE- specific errors, I'll place all Internet- Explorer-specific CSS fixes in separate files and serve them through conditional comments, as shown here. Now this reduces the weight of extra markup in my CSS, filters the browser- specific styles so they go directly to the browser that needs them, and makes it easier to update my code by making any hacks easy to locate and update.

You can even create conditional comments through specific versions or a range of Internet Explorer. For example, this one is saying if less than in the Explore 9, so be research IE-specific conditional comments and how to serve CSS through them. And finally, I've long ago given up on the notion that my pages are going to look exactly the same in every single browser. As a designer, that may seem disappointing, but let's be honest. The web is constantly evolving, with additional devices and browsers being added all the time. Thankfully, most devices have embraced standards to one degree or another, making our job a little bit easier.

By designing along existing web standards, we can make sure that the widest possible audience can see our content the way that we intended. By making sure that my design has the flexibility to still be impactful, regardless of a minor rendering issue here or there, I make sure that that page actually works in a wider array of clients. I'm not claiming that this strategy is the best, but I found it to be very effective for my own sites. I encourage you to do as much research as you can into browser differences and rendering issues. Based on what you learn, who your target audience is, and the requirements of your content, you're going to develop a strategy that works for you and does the best possible job of ensuring consistent user experience.

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