Audit Tricks
Aug 27, 2007
Just wanted to rant about people who think it's a good idea
to restrict user input.
I just copied and pasted my 8 character Confirmation Code
into a commercial web site and clicked "Go".
It whined that the Confirmation Code was invalid.
Comparing the value I had copied from to the field I had
pasted into, I saw that it had truncated the last character.
The Copy operation had included a leading space, and since
the field only allowed 8 characters, it kept the space and
dropped the last character of the Code.
That's bad user interface design.
The field should have accepted my input blindly and then
stripped whitespace and audited the remaining value.
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Nov 24, 2010
Anyone loading a bunch of CSS or Javascript via <link> tags on a web page knows about "blocking": where the browser stops the loading of the page because it has to go fetch (and read/parse) an external file. If you have a lot of these, or even if you don't and the user has a slow connection, you have a slow page. Users hateses teh slow pages, hatses them.
At the 2010 Fronteers Conference, Stoyan Stefanov gave a talk on Progressive Downloads and Rendering, where he listed some tricks to get around blocking by Javascript or other external files to make page load speed up. One trick was adding a <script> tag in the body (near the bottom, so after the important stuff has loaded) which adds a <script> tag to the <head> dynamically and runs it. While that file is being fetched, the rest of the page can continue to load. This is a bit asynchronous, isn't it (similar to web pages still loading content while also fetching images)?
As a follow-up to his Higher Order Javascript article (see SitePoint thread about it), Piers Cawley has gone further with Asynchronous Streams, where he uses jQuery (as an example) to load external files asynchronously to avoid blocking of the HTML document loading. In my web development career I haven't worried about blocking, but plenty of folks around here are loading ginormous files, and lots of them, for large sites. As developers, what do you do to get around slow page loads? Have you done anything like this asynchronous calling of the external files?
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