What is Alpine.js?

What is Alpine.js?

What is Alpine.js? A brief look at the new Vue-inspired JavaScript framework, with no virtual DOM. Alpine.js is a rugged, minimal frontend development framework for adding JavaScript behavior to HTML markups. Alpine is not meant to replace frameworks such as Vue and React. Alpine.js is like Tailwind for JavaScript. The DOM and behavior are not separated; you get to keep your DOM and sprinkle in behavior as you see fit. You can easily write declarative code as opposed to procedural code.

What is Alpine.js?

A brief look at the new Vue-inspired JavaScript framework, with no virtual DOM.

If you're a part of the Laravel community, you've probably already heard of Alpine. It's a minimalistic JavaScript framework that ditches the virtual DOM in favour of raw DOM updates and operations. The documentation says to Think of it like Tailwind for JavaScript.

Syntactically, it's inspired by Vue. This isn't a problem because Vue has the most beginner friendly and natural syntax in my opinion.

Let me show you where it all starts:

<div x-data="{}">
    <span>Sweet, sweet content.</span>
</div>

Everything in Alpine begins with a custom attribute, x-data. If you come from the Vue world, this is essentially the data property on one of your components. Alpine will search through your DOM, find all of the elements with this attribute and set them up for some sweet vanilla reactivity.

What can I put in this attribute?

That's a good question. In the same way as your Vue component data, the x-data attribute should contain a JavaScript object, something like this:

<div x-data="{ foo: 'bar' }">
    <span>Sweet, sweet content.</span>
</div>

When the DOM is scanned, Alpine will take this x-data attribute, run it through a clever little eval function (don't worry, it's not the regular core eval() function) that is powered by Function objects and then start to observe the data.

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