I'm currently exploring AlpineJS after having some experience with React and basic knowledge of Vue. One thing that has puzzled me about AlpineJS is how to update a state value from within a function, similar to how it's done in React.
Let's consider the following simplified code snippet:
<div x-data="{ array1 = [], array2 = [], total = 0 }">
<!-- ✅ Success: Get user input and populate array1 here -->
<!-- ✅ Success: Get user input and populate array2 here too -->
<button x-show="$store.total === 0; console.log("👉 ", $store.total)">
Do Something
</button>
</div>
<script>
const myFunc = (array1, array2, total) => {
// Reference: https://stackoverflow.com/q/76607996/1743124
const hash = array2.reduce((h, s) => {
h[s] = (h[s] || 0) + 1;
return h;
}, {});
array1.map(function(s) {
if(hash[s] && hash[s]--) {
console.log("🏌️♂️ total ", total);
Alpine.store('total', total--); // 🟥 QUESTION IS HERE.
console.log("🕴️ total-- ", total);
return '✅' + s;
} else {
return s;
}
});
}
</script>
The myFunc code snippet was taken from this Stack Overflow thread.
I've managed to achieve partial success but I'm now wondering how I can update the total state from within the myFunc function and make it accessible outside of that function.
In React, we would typically use useState like this:
// REACT JS EXAMPLE FOR A CONTRAST.
const [total, setTotal] = useState(0);
// Somewhere setTotal(500);
const myFunc = () => {
setTotal(total--); // under certain condition within a 🔄️ loop
return true;
};
With React, even though the function returns something else, the state gets updated through a setState call, allowing us to access the updated total anywhere outside the function. How can I achieve a similar behavior in AlpineJS?
I have tried using the global Store in AlpineJS, but it doesn't seem to work as expected. The console.logs inside the function show the correct values, including a zero when it should be zero, yet the console.log($store.total) gives me a one instead ⚠️.
https://i.stack.imgur.com/zIVsi.png
What am I missing here?
Is this an intended behavior of the Store global object in AlpineJS?
PS. The event triggering this functionality is @keyup when all necessary inputs are filled out.