Vanilla Speed

Me: I wonder how to make this cool new HTML5 feature interact with Javascript properly.


Stack Overflow Answer #1: Use this great jQuery function!

Stack Overflow Answer #2: Underscore.js is better, us it! You only need 1/2 a character of code.

Smacks desk in frustration.

I’m working on a major overhaul of an existing website that focuses on speed and a great mobile experience that has never used Javascript libraries, (it was originally written in 2007 before they were a thing), and we’re not changing that. For this website a library is a bunch of extra code to download, execute, and take up memory, which adds extra function calls between the code I write and the things that happen in the browser – more CPU cycles, more battery drain, more waiting, and no benefit to our users and customers.

If we were using jQuery I wouldn’t have spent some time looking up the differences in event creation between browsers, and I might not have spent the morning figuring out why a datalist wasn’t appearing properly in Firefox, or maybe I would have had to do that bit of debugging anyway. One thing that doesn’t help me move the project along at all is other people’s over-reliance on Javascript libraries that is so prevalent. In 2007 when I had a problem I could Google it, or post to a forum, and find an answer, (assuming it had been done before), today I experience the sequence of events at the top of this post several times every day. This is why the trio of blog posts last week, (Marco Arment’s post about PPK’s post about John Gruber’s take on Facebook Instant), have really resonated with me. PPK is right, we need to stop relying on libraries, whether it’s jQuery, underscore, or whatever. There are times when a library is the right tool, but with modern Javascript APIs, HTML5, and CSS3, and good browser support for all but the absolute bleeding-edge.

To use a Javascript library is to externalize the cost of development onto your customers and users.

Despite my frustration with the “use some library” responses on Stack Overflow questions using plain vanilla JavaScript has turned out to be an enjoyable learning experience. I’ve been able to make everything work, (so far), with way less code than was needed in 2007. Of course, if your browser can’t handle the project’s Javascript requirements the JS is not loaded at all and you get the plain HTML experience, which isn’t so bad either.

For more on choosing not to burden your users and customers with unneeded slowness, see the ALA article Choosing Vanilla Javascript, which is 15 months old now, and things have just gotten better since it was published!

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