Archive for the Agile Development Category

Debugging Internet Explorer CSS - My Methods

How I Debug

I recently spent the day debugging Internet Explorer. I save it for the absolute last step in front end development before pushing a site live. I want to avoid Explorer as much as possible.

I figured my process would be worth sharing. This is my setup.

  1. MacBook running Firefox with the Web Developer Plugin and Firebug plugins installed.
  2. Old Toshiba Laptop 1.8ghz barebones Windows XP installation with IE6
  3. Parallels installed on the MacBook with IE7 on Windows XP SP2

With this setup I can test for any modern browser with any kind of significant market share.

  • Firefox Mac
  • Firefox Win
  • IE 6 + 7 (soon to be 8 as well)
  • Camino
  • Safari

Debugging IE issues is probably the most painful thing about my job, but one that’s made a little bit easier because of my approach so I thought it’d be useful to share.

I develop 9-5 in Firefox so any rendering bugs usually come to my attention right away and I’ll fix them immediately. Camino is based on the same Gecko rendering engine so I don’t have to worry about anomalies there. Safari does a good job rendering everything and my colleagues use it as their day to day browser so we usually catch any rendering bugs that way.

Then it comes down to IE debugging. I only concern myself with IE6 and above, I can handle well for modern browsers, besides the market share of browsers that fall outside this range is really insignificant statistically. For small development teams it’s hardly worth the extra effort to pay attention to the long tail of browsers.

Looking at Google Analytics for a heavy traffic site that I work on:

5.6m Visitors from 8/1/07 - 3/20/08

6+mo-browsers.png
IE is still dominant - so testing for these browsers is essential.

ie-last-6+-mo.png
If we look at the last 6 months, IE7.0 and IE6.0 are neck and neck ~50/50, however:

ie-last-3mo.png
In the first 3+ months of 2008 you can see that IE7 has taken a significant leap above IE6 in the market 61/39 and IE 5.5 has gone to a 0.12% market share to a meager 0.07% market share.

That leaves us only concerned with IE6 and IE7 (and hopefully upcoming IE8 will be a non factor). The best way to deal with CSS and IE is by leveraging something called conditional comments

Before conditional comments I relied on browser hacks to differentiate between browsers, but conditional comments are a lot easier and so much more effective. Currently I use these declarations:

<!--[if IE 6]>
<link rel="stylesheet" href="/stylesheets/ie6.css" type="text/css" />
<![endif]-->
<!--[if IE 7]>
<link rel="stylesheet" href="/stylesheets/ie7.css" type="text/css" />
<![endif]-->

I start with IE6 and clean up any rendering issues - then I move on to IE7, which invariably has fewer issues to deal with. Because IE does not have a handy dandy tool like Firebug to help me diagnose the problem this process usually involves a lot of trial and error. It’s a very iterative process and one that my Agile Development Workflow is well suited for.

One technique I’ve found to be indispensable is assigning various background colors to the markup that I’m trying to debug. Often this is all I need to target CSS rules run amok. Over time you can avoid generating certain CSS + HTML that will break IE altogether - and that’s what separates the experts from novices.

Was this helpful? How do you approach debugging CSS in IE? Share!

Popularity: 13% [?]

Agile Development Workflow Part 2 - Love the sync

Continuation of Agile Development Workflow Part 1 - Setup (I’d start there). sync My lively-hood depends on the sync. It’s really what pulls all my projects together and unifies my workflow. It allows me to develop in numerous web technologies like Ruby On Rails, PHP, Django, Catalyst with relative ease, all at once. The Sync process is based on customized rsync commands. Assuming that you set up ssh properly (see Part 1), all we have to do now is create our shell script that does the heavy lifting for us. Essentially we’re pushing all of our changes up to the server as we see fit. Rsync can be customized to upload only the files that change with relative ease.

The first thing we’ll want to do is create the sync file which will be responsible for handling the rsync process. In the command line do:

macAttack: kb$ sudo touch /usr/bin/sync 
macAttack: kb$ sudo chmod +x /usr/bin/sync 
macAttack: kb$ mate /usr/bin/sync

You should be staring at an empty file. What we want to do is replicate the process you would usually do to push the site up live, or upload it to your development server via ftp.

It’s important that you have a consistent directory structure for your websites to get all of these “rules” setup (assuming that you’ll be working with multiple sites) properly. It will allow us to setup new rules with minimal effort.

I use Subversion (svn) for all of my projects and because of this I have a common directory structure for most of my web apps. It looks like this:

macAttack: kb$ /Development/Project/trunk/

For branches the directory structure looks like this:

macAttack: kb$ /Development/Project/branches/name

The beauty of syncing is all changes get moved over, overwriting the previous files so you rarely run into any sync errors and if you do it’s usually user error. :)

Here are the contents of my sync script (simplified)

#!/bin/bash

REPO=”" SRC=”" BRANCH=”" DEV=”Development” HOME=”/Users/kb”

case $1 in s) rsync –exclude-from=$HOME/.rsync-exclude -e “ssh” -ruv $HOME/$DEV/somedirection/trunk/blog/ serveradmin@mediatemple.com:~/domains/somedirection.com/html/ exit ;; *) echo “Unrecognized” ;; esac

Let’s break it down.

  1. –exclude-from=$HOME is setup to be the same path that relates to ~/. In my user home dir ~/ there’s a file named .rsync-exclude, this file is a line-break separated list of filenames we want to exclude in our sync. Check out my exclude list » rsync exclude. The exclude list prevents .svn (subversion dir’s) from being pushed to the remote server, so you can work on a checked out copy of your web project, but the server only gets what it needs without any unnecessary files.
  2. -e “ssh” tells rsync to go over ssh to sync the files, since we already set up ssh to enable auto-login to the remote server we won’t be prompted to provide a password on every sync (and you will sync alot).
  3. finally we pass the parameters -ruv -r, –recursive recurse into directories #this way you only have to pass a top level path -u, –update update only (don’t overwrite newer files) #it’s important that your computers internal clock matches the remote servers -v, –verbose increase verbosity
  4. The Local Path: $HOME/$DEV/somedirection/trunk/blog/
  5. The Remote Path: serveradmin@mediatemple.com:~/domains/somedirection.com/html/ => username@remotehost:remotepath
  6. If the following command is run from from Terminal:

    macAttack: kb$/usr/bin/sync s
    If all goes well you should get verbose output from your sync!

    Rsync is a powerful tool, can work wonders with backups as well.

    Let me know if you found this article helpful and give feedback. Stay tuned for Sync integration with TextMate that will really put your whole dev process in overdrive!

    Popularity: 20% [?]