This script works great as a stock countdown, but I can't display it in more than 1 spot on the same page.
For example, there are 4 or 5 products/plans on the same page, each product displays a different inventory quantity, and the time when the quantity changes is also different. Shown on only 1 product.
<span class="qty" id="qty"></span>
<script>
const setQty = (qty) => {
qtySpan.innerHTML = qty;
if (qty == 0) return;
let parts = Math.floor((Math.random() * 3) + 1);
if (parts > qty) parts = qty;
const msec = Math.floor(((Math.random() * 15) + 15) * 1000);
qty -= parts;
// Save the updated quantity in localStorage
localStorage.setItem('saved_countdown', qty);
setTimeout(() => setQty(qty), msec);
}
// Get the saved countdown value from localStorage, or use default value of 57 if not found
const defaultQty = localStorage.getItem('saved_countdown') ?? 57;
const qtySpan = document.getElementById('qty');
// Set the initial value of the quantity
setQty(defaultQty);
</script>
I copied the script 4x and changed the ID "qty" to qty1, qty2, qty3 and qty4 but it doesn't work, it only shows up in 1 product...:/
Can anyone here help me? Thanks!
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I changed the functionality so that you can have multiple countdowns.
const setQty = (qtySpan, qty) => { qtySpan.innerHTML = qty; if (qty == 0) return; let parts = Math.floor((Math.random() * 3) + 1); if (parts > qty) parts = qty; const msec = Math.floor(((Math.random() * 15) + 15) * 1000); qty -= parts; // Save the updated quantity in localStorage localStorage.setItem('saved_countdown', qty); setTimeout(() => setQty(qty), msec); } const defaultQty = localStorage.getItem('saved_countdown') ?? 57; let listOfQty = document.querySelectorAll('.qty'); listOfQty.forEach((qty) =>{ setQty(qty, defaultQty); })You just send the specific number for each countdown as the second parameter.
I've modified your script to a custom element. This means you can now create an element called
<stock-counter>.This element has 2 attributes,
quantityandstorage-key.quantityis the amount to start counting from.storage-keyis the name of the local storage key used to store the last count for this specific counter. If a storage key is set and a storage value is found, that value replaces thequanitityvalue, unless the storage value is0.So the element looks like this:
You can place any number of these elements on the page and modify the
quantityandstorage-keyof each element.customElements.define('stock-counter', class extends HTMLElement { get quantity() { // Check if value has been stored. if (this.storageKey !== null) { const value = Number(localStorage.getItem(this.storageKey)); // Use that value if it is a valid number and not 0. if (!Number.isNaN(value) && value !== 0) { return value; } } // Otherwise get the value from the quantity attribute. const value = Number(this.getAttribute('quantity')); if (Number.isNaN(value)) { return 0; } return value; } set quantity(value) { if (!isNaN(value)) { // Store the new value if it's possible. if (this.storageKey !== null) { localStorage.setItem(this.storageKey, value); } // Set the new attribute value. this.setAttribute('quantity', value); } } get storageKey() { return this.getAttribute('storage-key'); } connectedCallback() { this.count(); } count = () => { const qty = this.quantity; this.textContent = qty; if (qty === 0) { return; } let parts = Math.floor((Math.random() * 3) + 1); if (parts > qty) { parts = qty; } this.quantity -= parts; const msec = Math.floor(((Math.random() * 15) + 15) * 1000); setTimeout(this.count, msec); }; });