Paste either snippet into your page — a Custom HTML block on WordPress, Shopify, or Squarespace works too. Both snippets update live as you customize, so what you copy is exactly what you configured.
<!-- Free Stock Level Indicator widget by haynes lab — https://hayneslab.dev/tools/widgets/stock-level-indicator -->
<script data-hl-stock="4" data-hl-max="20">
/*!
* haynes lab — Stock Level Indicator widget (free)
* Docs & embed code: https://hayneslab.dev/tools/widgets/stock-level-indicator
*/
(function () {
'use strict';
var PREFIX = 'hlw-stock-level-indicator';
var STYLE_ID = 'hlw-stock-level-indicator-styles';
function findScript() {
return document.currentScript ||
document.querySelector('script[src*="widgets/stock-level-indicator.js"]');
}
function injectStyles() {
if (document.getElementById(STYLE_ID)) return;
var css =
'.' + PREFIX + ', .' + PREFIX + ' * { box-sizing: border-box; }' +
'.' + PREFIX + ' { position: relative; max-width: 480px; margin: 0 auto; padding: 18px 20px 26px;' +
' font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;' +
' font-size: 15px; line-height: 1.5; color: #1f2937; background: #ffffff;' +
' border: 1px solid #e5e7eb; border-radius: 12px; }' +
'.' + PREFIX + '__text { margin: 0 0 10px; font-size: 15px; color: #374151; }' +
'.' + PREFIX + '__count { font-weight: 700; color: var(--hlw-level); }' +
'.' + PREFIX + '__track { height: 8px; border-radius: 999px; background: #f3f4f6; overflow: hidden; }' +
'.' + PREFIX + '__fill { height: 100%; border-radius: 999px; background: var(--hlw-level);' +
' transition: width 0.6s ease, background 0.3s ease; }' +
'.' + PREFIX + '__credit { position: absolute; right: 10px; bottom: 6px; font-size: 11px;' +
' display: inline-flex; align-items: center; gap: 4px; color: #9ca3af; text-decoration: none; }' +
'.' + PREFIX + '__credit svg { display: block; }' +
'.' + PREFIX + '__credit:hover { color: #6b7280; text-decoration: underline; }' +
'@media (max-width: 560px) { .' + PREFIX + ' { padding: 16px 16px 26px; } }';
var style = document.createElement('style');
style.id = STYLE_ID;
style.textContent = css;
document.head.appendChild(style);
}
function el(tag, className, text) {
var node = document.createElement(tag);
if (className) node.className = className;
if (text != null) node.textContent = text;
return node;
}
function logoSvg() {
var svgNS = 'http://www.w3.org/2000/svg';
var svg = document.createElementNS(svgNS, 'svg');
svg.setAttribute('viewBox', '0 0 32 32');
svg.setAttribute('width', '13');
svg.setAttribute('height', '13');
svg.setAttribute('aria-hidden', 'true');
svg.setAttribute('focusable', 'false');
function circle(cx, cy, r, attrs) {
var c = document.createElementNS(svgNS, 'circle');
c.setAttribute('cx', cx);
c.setAttribute('cy', cy);
c.setAttribute('r', r);
for (var key in attrs) c.setAttribute(key, attrs[key]);
svg.appendChild(c);
}
circle(16, 16, 16, { fill: '#0f0a0a' });
circle(16, 16, 12, { fill: 'none', stroke: '#fff5f5', 'stroke-width': 1, opacity: 0.3 });
circle(16, 16, 9, { fill: 'none', stroke: '#fff5f5', 'stroke-width': 1, opacity: 0.5 });
circle(16, 16, 6, { fill: 'none', stroke: '#fff5f5', 'stroke-width': 1.2, opacity: 0.9 });
circle(16, 16, 3, { fill: '#06b6d4' });
circle(24.5, 7.5, 2, { fill: '#f97316' });
circle(7, 16, 1.8, { fill: '#f97316' });
circle(20, 20, 1.5, { fill: '#f97316' });
return svg;
}
function build(script) {
var stock = parseInt(script.getAttribute('data-hl-stock'), 10);
if (isNaN(stock) || stock < 0) {
console.warn('[haynes lab stock-level-indicator] Missing or invalid required data-hl-stock attribute (non-negative integer). Nothing rendered.');
return;
}
var max = parseInt(script.getAttribute('data-hl-max'), 10);
if (isNaN(max) || max < 1) max = 100;
if (stock > max) max = stock;
var template = script.getAttribute('data-hl-text') || 'Only {stock} left in stock — order soon';
var accent = script.getAttribute('data-hl-accent') || '#f97316';
var ratio = stock / max;
var level = accent;
if (stock === 0 || ratio <= 0.2) level = '#ef4444';
else if (ratio <= 0.5) level = '#f59e0b';
injectStyles();
var root = el('div', PREFIX);
root.style.setProperty('--hlw-level', level);
var text = el('p', PREFIX + '__text');
if (stock === 0) {
text.textContent = 'Out of stock';
} else {
var parts = template.split('{stock}');
for (var i = 0; i < parts.length; i++) {
var segment = parts[i].replace(/\{max\}/g, String(max));
if (segment) text.appendChild(document.createTextNode(segment));
if (i < parts.length - 1) {
text.appendChild(el('span', PREFIX + '__count', String(stock)));
}
}
}
root.appendChild(text);
var track = el('div', PREFIX + '__track');
track.setAttribute('role', 'progressbar');
track.setAttribute('aria-label', 'Stock level');
track.setAttribute('aria-valuemin', '0');
track.setAttribute('aria-valuemax', String(max));
track.setAttribute('aria-valuenow', String(stock));
var fill = el('div', PREFIX + '__fill');
fill.style.width = Math.round(ratio * 100) + '%';
track.appendChild(fill);
root.appendChild(track);
var credit = el('a', PREFIX + '__credit');
credit.appendChild(logoSvg());
credit.appendChild(document.createTextNode('Powered by haynes lab'));
credit.href = 'https://hayneslab.dev/tools/widgets/stock-level-indicator';
credit.target = '_blank';
credit.rel = 'noopener';
root.appendChild(credit);
if (script.parentNode && script.parentNode.nodeName !== 'HEAD') {
script.insertAdjacentElement('afterend', root);
} else {
document.body.appendChild(root);
}
}
function init() {
var script = findScript();
if (!script) {
console.warn('[haynes lab stock-level-indicator] Could not locate its own script tag. Nothing rendered.');
return;
}
build(script);
}
if (document.body) {
init();
} else {
document.addEventListener('DOMContentLoaded', init);
}
})();
</script>