Tags: templating

HTMX Is So Cool I Rolled My Own! – David Bushell – Freelance Web Design (UK)

Call it HTMLX or call it Hijax, what matters isn’t the code so much as the idea:

Front-end JavaScript fatigue is real. I’m guilty myself of over-engineering JS UI despite preferring good old server templates. I don’t even think HTMX is that good but the philosophy behind it embarrasses the modern JavaScript developer. For that I appreciate it very much.

scottjehl/PE: declarative data binding for HTML

This is an interesting idea from Scott—a templating language that doesn’t just replace variables with values, but keeps the original variable names in there too.

Not sure how I feel about using data- attributes for this though; as far as I know, they’re intended to be site-specific, not for cross-site solutions like this.

There’s a worrying tendency for “real” programmers look down their noses at CSS. It’s just a declarative language, they point out, not a fully-featured programming language. Heck, it isn’t even a scripting language.

That may be true, but that doesn’t mean that CSS isn’t powerful. It’s just powerful in different ways to traditional languages.

Take CSS selectors, for example. At the most basic level, they work like conditional statments. Here’s a standard if statement:

if (condition) {
// code here
}

The condition needs to evaluate to true in order for the code in the curly braces to be executed. Sound familiar?

condition {
// styles here
}

That’s a very simple mapping, but what if the conditional statement is more complicated?

if (condition1 && condition2) {
// code here
}

Well, that’s what the decendant selector does:

condition1 condition2 {
// styles here
}

In fact, we can get even more specific than that by using the child combinator, the sibling combinator, and the adjacent sibling combinator:

• condition1 > condition2
• condition1 ~ condition2
• condition2 + condition2

AND is just one part of Boolean logic. There’s also OR:

if (condition1 || condition2) {
// code here
}

In CSS, we use commas:

condition1, condition2 {
// styles here
}

We’ve even got the :not() pseudo-class to complete the set of Boolean possibilities. Once you add quantity queries into the mix, made possible by :nth-child and its ilk, CSS starts to look Turing complete. I’ve seen people build state machines using the adjacent sibling combinator and the :checked pseudo-class.

Anyway, my point here is that CSS selectors are really powerful. And yet, quite often we deliberately choose not to use that power. The entire raison d’être for OOCSS, BEM, and Smacss is to deliberately limit the power of selectors, restricting them to class selectors only.

On the face of it, this might seem like an odd choice. After all, we wouldn’t deliberately limit ourselves to a subset of a programming language, would we?

We would and we do. That’s what templating languages are for. Whether it’s PHP’s Smarty or Twig, or JavaScript’s Mustache, Nunjucks, or Handlebars, they all work by providing a deliberately small subset of features. Some pride themselves on being logic-less. If you find yourself trying to do something that the templating language doesn’t provide, that’s a good sign that you shouldn’t be trying to do it in the template at all; it should be in the controller.

So templating languages exist to enforce simplicity and ensure that the complexity happens somewhere else. It’s a similar story with BEM et al. If you find you can’t select something in the CSS, that’s a sign that you probably need to add another class name to the HTML. The complexity is confined to the markup in order to keep the CSS more straightforward, modular, and maintainable.

But let’s not forget that that’s a choice. It’s not that CSS in inherently incapable of executing complex conditions. Quite the opposite. It’s precisely because CSS selectors (and the cascade) are so powerful that we choose to put guard rails in place.

HTML templating with vanilla JavaScript ES2015 Template Literals – Ben Frain

Ben makes the very good point that template literals allow you to do a lot of useful stuff that previously would’ve required a library:

Template Literals afford a lot of power with no library overhead. I will definitely continue to use them when complexity of handlebars or similar is overkill.

Chris made a similar observation a little while back. Throw in a little script like lit-html and now you’ve got DOM-diffing too. You might not need insert-current-framework-name after all.

Kinda cool that these mini-libraries exist that do useful things for us, so when situations arise that we want a feature that a big library has, but don’t want to use the whole big library, we got smaller options.

Jekyll Includes are Cool - daverupert.com

Dave explains how Jekyll Includes are starting to convert him to web components. The encapsulation is nice and neat. And he answers the inevitable “but why not use React?” question:

Writing HTML that contains JavaScript, not JavaScript that contains HTML, feels good to me.

The key feature for me is that this approach doesn’t have to depend on JavaScript in the browser:

I like that Web Components are an entirely client-side technology but can be rendered server-side in existing tech stacks whether it’s Jekyll, Rails, or even some Enterprise Java system.

Offline-first for Your Templated Site (Part Two)

I’m really interested in this idea of service-worker side templating (I know that Glenn is working on something really, really cool in this area too). Can’t wait for part three of this series! (hint, hint, Jeff)