Streamline savings on your Amazon wishlist—highlight historic lows, compare current vs. best price with a smart button, and hide unwanted entries via persistent toggles. Stores every price update in your wishlist comments so your deal log follows you everywhere. Lightweight, multi-region support, no extra permissions.
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// ==UserScript==
// @name Wishlist Steal Deal Checker
// @namespace https://greasyfork.org/en/users/1019658-aayush-dutt
// @version 1.1.3
// @description Streamline savings on your Amazon wishlist—highlight historic lows, compare current vs. best price with a smart button, and hide unwanted entries via persistent toggles. Stores every price update in your wishlist comments so your deal log follows you everywhere. Lightweight, multi-region support, no extra permissions.
// @author aayushdutt
// @match https://www.amazon.com/hz/wishlist*
// @match https://www.amazon.in/hz/wishlist*
// @match https://www.amazon.de/hz/wishlist/ls*
// @match https://www.amazon.fr/hz/wishlist/ls*
// @match https://www.amazon.it/hz/wishlist/ls*
// @match https://www.amazon.es/hz/wishlist/ls*
// @match https://www.amazon.nl/hz/wishlist/ls*
// @match https://www.amazon.se/hz/wishlist/ls*
// @match https://www.amazon.co.jp/hz/wishlist/ls*
// @match https://www.amazon.co.uk/hz/wishlist/ls*
// @match https://www.amazon.com.mx/hz/wishlist/ls*
// @match https://www.amazon.com.au/hz/wishlist/ls*
// @match https://www.amazon.com.be/hz/wishlist/ls*
// @grant none
// @link https://greasyfork.org/en/scripts/468955-wishlist-steal-deal-checker
// @license MIT
// ==/UserScript==
(function () {
'use strict';
// ---- STORAGE HELPERS ----
const STORAGE_KEYS = {
hideWorse: 'wsdc-hide-worse',
hideUnpriced: 'wsdc-hide-unpriced',
reloadOnFirst: 'wsdc-reload-on-first'
};
const storage = {
get(key, def) {
const v = localStorage.getItem(key);
return v === null ? def : v === 'true';
},
set(key, bool) {
localStorage.setItem(key, bool ? 'true' : 'false');
}
};
// ---- STATE ----
let hideWorse = storage.get(STORAGE_KEYS.hideWorse, true);
let hideUnpriced = storage.get(STORAGE_KEYS.hideUnpriced, true);
let reloadOnFirst = storage.get(STORAGE_KEYS.reloadOnFirst, true);
// ---- INJECT CSS ----
const style = document.createElement('style');
style.textContent = `
.wsdc-best-equal { background: #f1fffe !important; }
.wsdc-best-better { background: #d0fbe4 !important; }
.add-current-price {
margin-top: 4px;
padding: 2px 6px !important;
width: auto !important;
max-width: 300px !important;
}
.add-current-price .wsdc-pct {
font-size: 90%;
margin-left: 4px;
}
.wsdc-pct-positive { color: #080; }
.wsdc-pct-negative { color: #c00; }
#wsdc-toggle-container { margin: 8px 0; font-size: 14px; }
#wsdc-toggle-container label { margin-right: 16px; }
#wsdc-toggle-container input { margin-right: 4px; }
`;
document.head.appendChild(style);
// ---- PARSERS & HELPERS ----
const getAllItems = () =>
Array.from(document.querySelectorAll('ul#g-items > li[data-id]'));
const parsePrice = item => {
const n = parseFloat(item.dataset.price);
return Number.isFinite(n) ? n : null;
};
const findCommentEl = item =>
item.querySelector(
'div.awl-ul-keyword-item-subtitle span.a-color-secondary'
);
const parseCommentPrices = commentEl => {
if (!commentEl) return [];
return Array.from(commentEl.textContent.matchAll(/[\d,.]+/g))
.map(m => parseFloat(m[0].replace(/,/g, '')))
.filter(n => Number.isFinite(n));
};
// returns 1=better,0=equal,-1=worse,null=no data
const comparePrice = (price, comments) => {
if (price === null || comments.length === 0) return null;
const minC = Math.min(...comments);
if (price < minC) return 1;
if (price === minC) return 0;
return -1;
};
const getCsrf = () =>
document.querySelector('input[name="anti-csrftoken-a2z"]')?.value || '';
const CSRF = getCsrf();
const updateComment = async (item, text) => {
const params = JSON.parse(
item.getAttribute('data-reposition-action-params') || '{}'
);
const payload = {
comment: text,
desiredQuantity: 1,
isJson: true,
listType: 'wishlist',
priority: 0,
hasQuantity: 0,
viewType: 'list',
itemID: params.itemExternalId,
listID: item.dataset.id,
sid: params.sid
};
const resp = await fetch('/hz/wishlist/updatecqp', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'anti-csrftoken-a2z': CSRF
},
body: JSON.stringify(payload)
});
if (!resp.ok) throw new Error(`Status ${resp.status}`);
};
// ---- ATTACH BUTTON WITH OPTIONAL % ----
const attachButton = (item, price, comments) => {
if (price === null || comments.includes(price)) return;
const container = item.querySelector(
'div.awl-ul-keyword-item-subtitle'
);
if (!container || container.querySelector('.add-current-price'))
return;
const btn = document.createElement('button');
btn.className =
'a-button a-button-base a-button-small add-current-price';
let inner = 'Add Current Price';
if (comments.length > 0) {
const minC = Math.min(...comments);
const pct = Math.round(((price - minC) / minC) * 100);
const sign = pct > 0 ? '+' : '';
const cls = pct < 0 ? 'wsdc-pct-positive' : 'wsdc-pct-negative';
inner += ` <span class="wsdc-pct ${cls}">(${sign}${pct}%)</span>`;
}
btn.innerHTML = inner;
btn.onclick = async () => {
const initial = comments.length === 0;
const all = [...comments, price].sort((a, b) => b - a);
const text = all.join(', ');
try {
await updateComment(item, text);
if (initial && reloadOnFirst) {
location.reload();
} else {
findCommentEl(item).textContent = text;
}
} catch (e) {
console.error('Update failed', e);
alert(`Failed to update comment: ${e.message}`);
}
};
container.appendChild(btn);
};
// ---- MAIN PROCESS ----
const processWishlist = () => {
getAllItems().forEach(item => {
if (item.dataset.wsdcDone) return;
const price = parsePrice(item);
const comments = parseCommentPrices(findCommentEl(item));
const cmp = comparePrice(price, comments);
item.dataset.wsdcComparison = cmp === null ? 'null' : String(cmp);
item.dataset.wsdcPriced = price === null ? 'false' : 'true';
attachButton(item, price, comments);
if (cmp === 0) item.classList.add('wsdc-best-equal');
if (cmp === 1) item.classList.add('wsdc-best-better');
item.dataset.wsdcDone = '1';
});
updateVisibility();
};
// ---- VISIBILITY ----
const updateVisibility = () => {
getAllItems().forEach(item => {
const cmp = item.dataset.wsdcComparison;
const priced = item.dataset.wsdcPriced === 'true';
if (hideUnpriced && !priced) item.style.display = 'none';
else if (hideWorse && cmp === '-1') item.style.display = 'none';
else item.style.display = '';
});
};
// ---- TOGGLE PANEL ----
const insertTogglePanel = () => {
const wrapper = document.querySelector('#g-items')?.parentElement;
if (!wrapper) return;
const panel = document.createElement('div');
panel.id = 'wsdc-toggle-container';
panel.innerHTML = `
<label><input type="checkbox" id="wsdc-hide-worse">
Hide overpriced
</label>
<label><input type="checkbox" id="wsdc-hide-unpriced">
Hide out-of-stock
</label>
<label><input type="checkbox" id="wsdc-reload-first">
Reload on first comment add
</label>
`;
wrapper.insertBefore(panel, wrapper.firstChild);
const cbWorse = panel.querySelector('#wsdc-hide-worse');
const cbUnpriced= panel.querySelector('#wsdc-hide-unpriced');
const cbReload = panel.querySelector('#wsdc-reload-first');
cbWorse.checked = hideWorse;
cbUnpriced.checked = hideUnpriced;
cbReload.checked = reloadOnFirst;
cbWorse.addEventListener('change', e => {
hideWorse = e.target.checked;
storage.set(STORAGE_KEYS.hideWorse, hideWorse);
updateVisibility();
});
cbUnpriced.addEventListener('change', e => {
hideUnpriced = e.target.checked;
storage.set(STORAGE_KEYS.hideUnpriced, hideUnpriced);
updateVisibility();
});
cbReload.addEventListener('change', e => {
reloadOnFirst = e.target.checked;
storage.set(STORAGE_KEYS.reloadOnFirst, reloadOnFirst);
});
};
// ---- BOOT ----
insertTogglePanel();
processWishlist();
const container = document.getElementById('g-items');
if (container) {
new MutationObserver(processWishlist).observe(container, {
childList: true,
subtree: true
});
}
})();