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When using CSS, we can just include both declarations, one using rgba, and one without it, as mentioned in my post on cross-browser RGBA backgrounds. When writing JavaScript however, it’s a waste of resources to do that (and requires more verbose code), since we can easily check whether the browser is RGBA-capable, almost as easily [...]
I used to take pride in my short, bulletproof and elegant String and Number type checks: // Check whether obj is a Number obj + 0 === obj // Check whether obj is a String obj + ” === obj I always thought that apart from being short and elegant, they should be faster. However, [...]
Ever wanted to run a snippet of JavaScript on a browser that doesn’t support a console in order to debug something? (for instance, IE6, Opera etc) You probably know about Firebug Lite, but this either requires you to already have the bookmarklet, or include the script in the page. Although Firebug Lite is a great [...]
You might just dislike JavaScript libraries and the trend around them, or the project you’re currently working on might be too small for a JavaScript library. In both cases, I understand, and after all, who am I to judge you? I don’t use a library myself either (at least not one that you could’ve heard [...]
As you probably know already, when browsers implement an experimental or proprietary CSS property, they prefix it with their “vendor prefix”, so that 1) it doesn’t collide with other properties and 2) you can choose whether to use it or not in that particular browser, since it’s support might be wrong or incomplete. When writing [...]
Math.round, Math.ceil and Math.floor are very useful functions. However, when using them, I find myself many times needing to specify a precision level. You don’t always want to round to an integer, you often just want to strip away some of the decimals. We probably all know that if we have a function to round [...]
Ever wondered which JavaScript library (if any) is hidden beneath the bells & whistles of each site you gazed at? Since I am a curious person, I find myself wondering every time, so after a bit of research, I wrapped up a little bookmarklet that instantly told me the answer every time.
Sometimes when using JavaScript, you need to determine whether a certain CSS property is supported by the current browser or not. For instance when setting opacity for an element, you need to find out whether the property that the browser supports is opacity, -moz-opacity (MozOpacity), -khtml-opacity (KhtmlOpacity) or the IE proprietary filter. Instead of performing [...]