Faster, smarter Amazon enhancer. Strictly detects Amazon Monthly Payments (e.g., $xx/month for N months). No Affirm/Klarna/Prime Visa/financing noise. Lazy Camel/Keepa, SPA-aware, saved gear position, immediate monthly refresh + detector debug toggle.
// ==UserScript==
// @name Amazon Enhancer: Monthly + ReviewMeta + Camel + Keepa + UI + Dark + Review Highlights (Enhanced)
// @namespace Eliminater74
// @version 1.6.2
// @description Faster, smarter Amazon enhancer. Strictly detects Amazon Monthly Payments (e.g., $xx/month for N months). No Affirm/Klarna/Prime Visa/financing noise. Lazy Camel/Keepa, SPA-aware, saved gear position, immediate monthly refresh + detector debug toggle.
// @author Eliminater74
// @license MIT
// @match https://www.amazon.com/*
// @match https://www.amazon.co.uk/*
// @match https://www.amazon.de/*
// @match https://www.amazon.fr/*
// @match https://www.amazon.it/*
// @match https://www.amazon.es/*
// @match https://www.amazon.ca/*
// @match https://smile.amazon.com/*
// @grant GM_xmlhttpRequest
// @connect reviewmeta.com
// @run-at document-end
// ==/UserScript==
(function () {
'use strict';
// -----------------------------
// Settings & utils
// -----------------------------
const SETTINGS_KEY = 'amazonEnhancerSettings';
const GEAR_POS_KEY = 'amazonEnhancerGearPos';
const defaultSettings = {
showReviewMeta: true,
showCamel: true,
showKeepa: true,
theme: 'auto',
highlightBestReviews: true,
hideAds: true,
showSoldBy: true,
stickyPriceBox: true,
autoSortReviews: true,
expandReviewsQA: true,
// Monthly-payments
highlightMonthlyPayments: true,
filterOnlyMonthly: false,
// extras
hideFbtAndRecs: true,
forceVerifiedPurchase: false,
keyboardShortcut: true,
primeOnlyFilter: false,
// debugging
debugMonthlyDetector: false
};
const $ = (s, r=document)=>r.querySelector(s);
const $$ = (s, r=document)=>Array.from(r.querySelectorAll(s));
const onIdle=(fn)=>(window.requestIdleCallback||setTimeout)(fn,0);
const debounce=(fn,ms=200)=>{let t;return(...a)=>{clearTimeout(t);t=setTimeout(()=>fn(...a),ms);};};
const throttle=(fn,ms=200)=>{let p=0;return(...a)=>{const n=Date.now();if(n-p>=ms){p=n;fn(...a);}};};
const settings = Object.assign({}, defaultSettings, loadJSON(SETTINGS_KEY) || {});
saveJSON(SETTINGS_KEY, settings);
function loadJSON(k){ try{ return JSON.parse(localStorage.getItem(k)||'{}'); }catch{ return {}; } }
function saveJSON(k,v){ localStorage.setItem(k, JSON.stringify(v)); }
function getLocale(){
const h=location.hostname;
if(h.includes('.co.uk'))return'uk';
if(h.includes('.de'))return'de';
if(h.includes('.fr'))return'fr';
if(h.includes('.es'))return'es';
if(h.includes('.it'))return'it';
if(h.includes('.ca'))return'ca';
return'us';
}
const locale=getLocale();
function detectASIN(){
const m=location.href.match(/\/([A-Z0-9]{10})(?:[/?]|$)/);
if(m) return m[1];
const meta=$('input#ASIN')||$('[name="ASIN.0"]')||$('[name="ASIN"]');
if(meta?.value) return meta.value;
const body=document.body.getAttribute('data-asin')||document.body.getAttribute('data-asin-candidate');
if(body && /^[A-Z0-9]{10}$/.test(body)) return body;
const el=$('[data-asin]'); const g=el?.getAttribute('data-asin');
return /^[A-Z0-9]{10}$/.test(g||'')?g:null;
}
let ASIN=detectASIN();
// -----------------------------
// Theme
// -----------------------------
applyTheme(settings.theme);
function applyTheme(mode){
const html=document.documentElement;
const want=(mode==='auto')?(matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light'):mode;
html.setAttribute('data-enhancer-theme',want);
$('#amazon-enhancer-theme-style')?.remove();
const style=document.createElement('style');
style.id='amazon-enhancer-theme-style';
style.textContent=`
[data-enhancer-theme="dark"] .amazon-enhancer-box{background:#1d1d1d!important;color:#f0f0f0!important;border-color:#555!important}
[data-enhancer-theme="dark"] .amazon-enhancer-box a{color:#7dddf2!important}
[data-enhancer-theme="dark"] .amazon-enhancer-panel{background:#2c2c2c!important;color:#eee!important;border-color:#555!important}
.highlighted-review{border:2px solid gold!important;background:#fffbea!important}
.monthly-badge{position:absolute;top:10px;left:10px;background:#0099cc!important;color:#fff!important;padding:2px 6px;font-weight:bold;font-size:12px;border-radius:4px;z-index:2147483647!important}
`;
document.head.appendChild(style);
}
// -----------------------------
// UI (gear + panel)
// -----------------------------
createToggleUI();
function createToggleUI(){
const gear=document.createElement('div');
gear.id='amazon-enhancer-gear';
gear.textContent='⚙️';
gear.style.cssText=`position:fixed;width:40px;height:40px;font-size:22px;background:#222;color:#fff;border:2px solid #888;border-radius:50%;
display:flex;justify-content:center;align-items:center;cursor:move;box-shadow:0 0 12px rgba(0,0,0,.8);z-index:2147483647;`;
restoreGearPosition(gear);
const panel=document.createElement('div');
panel.className='amazon-enhancer-panel';
panel.style.cssText=`position:fixed;border:1px solid #ccc;padding:10px;border-radius:8px;z-index:2147483646;background:#fff;display:none;
right:20px;bottom:70px;max-width:330px;font-family:system-ui,Segoe UI,Arial,sans-serif;font-size:13px;line-height:1.3;`;
const toggles=[
['showReviewMeta','ReviewMeta'],
['showCamel','CamelCamelCamel (lazy)'],
['showKeepa','Keepa (lazy)'],
['highlightBestReviews','Highlight Best Reviews'],
['hideAds','Hide Sponsored Ads'],
['showSoldBy','Highlight “Sold by” box'],
['stickyPriceBox','Sticky Price Box'],
['autoSortReviews','Auto Sort Reviews (recent)'],
['expandReviewsQA','Expand Q&A/Reviews'],
['highlightMonthlyPayments','Highlight Monthly Payments'],
['filterOnlyMonthly','Filter: Only Amazon Monthly Payments'],
['hideFbtAndRecs','Hide FBT & Recommendations'],
['forceVerifiedPurchase','Reviews: Verified Purchase only'],
['primeOnlyFilter','Search: Prime only'],
['keyboardShortcut','Keyboard Toggle (Alt+E)'],
['debugMonthlyDetector','Debug: Monthly detector → console']
];
panel.innerHTML = `
${toggles.map(([k,l])=>`<label style="display:block;margin:4px 0;"><input type="checkbox" id="${k}" ${settings[k]?'checked':''}> ${l}</label>`).join('')}
<label style="display:block;margin-top:6px;">Theme:
<select id="themeSelect">
<option value="auto" ${settings.theme==='auto'?'selected':''}>Auto</option>
<option value="light" ${settings.theme==='light'?'selected':''}>Light</option>
<option value="dark" ${settings.theme==='dark'?'selected':''}>Dark</option>
</select>
</label>
<div style="margin-top:8px;">
<button id="rescanMonthlyBtn" class="a-button a-button-primary" style="padding:6px 10px;">Rescan Monthly Now</button>
</div>
`;
toggles.forEach(([key])=>{
const el=panel.querySelector('#'+key);
el.addEventListener('change', e=>{
settings[key]=e.target.checked; saveJSON(SETTINGS_KEY, settings);
if (key==='filterOnlyMonthly' || key==='highlightMonthlyPayments' || key==='debugMonthlyDetector') { rescanMonthly(true); return; }
if (key==='primeOnlyFilter') { primeOnlyFilter(true); if(!settings.primeOnlyFilter) showAllResults(); return; }
if (key==='hideAds' || key==='hideFbtAndRecs') { hideSponsored(); hideFbtAndRecs(); return; }
if (key==='showReviewMeta' || key==='showCamel' || key==='showKeepa') { renderDataBoxes(); return; }
});
});
panel.querySelector('#themeSelect').addEventListener('change', e=>{
settings.theme=e.target.value; saveJSON(SETTINGS_KEY, settings); applyTheme(settings.theme);
});
panel.querySelector('#rescanMonthlyBtn').addEventListener('click', ()=> rescanMonthly(true));
// drag/click
let isDragging=false, startX=0, startY=0, moved=false;
gear.addEventListener('mousedown', e=>{
isDragging=true;moved=false;
startX=e.clientX-gear.getBoundingClientRect().left;
startY=e.clientY-gear.getBoundingClientRect().top;
e.preventDefault();
});
document.addEventListener('mousemove', e=>{
if(!isDragging)return;
gear.style.left=(e.clientX-startX)+'px';
gear.style.top=(e.clientY-startY)+'px';
gear.style.right='auto'; gear.style.bottom='auto'; moved=true;
});
document.addEventListener('mouseup', ()=>{
if(!isDragging)return; isDragging=false;
if(moved) saveJSON(GEAR_POS_KEY, {left:gear.style.left, top:gear.style.top});
});
gear.addEventListener('click', ()=>{ if(moved)return; panel.style.display=panel.style.display==='none'?'block':'none'; });
gear.ondragstart=()=>false;
if (settings.keyboardShortcut) {
document.addEventListener('keydown', e=>{
if (e.altKey && (/^e$/i).test(e.key)) { e.preventDefault(); panel.style.display=panel.style.display==='none'?'block':'none'; }
});
}
document.body.appendChild(gear);
document.body.appendChild(panel);
}
function restoreGearPosition(gear){
const pos=loadJSON(GEAR_POS_KEY);
if(pos?.left && pos?.top){ gear.style.left=pos.left; gear.style.top=pos.top; gear.style.right='auto'; gear.style.bottom='auto'; }
else { gear.style.bottom='20px'; gear.style.right='20px'; }
}
// -----------------------------
// Data boxes (lazy)
// -----------------------------
function appendToTarget(el){
const t = $('#unifiedPrice_feature_div') || $('#corePrice_feature_div') || $('#title')?.closest('.a-section');
if (t) t.appendChild(el);
}
function renderDataBoxes(){
$$('.amazon-enhancer-box').forEach(n=>n.remove());
const asin=ASIN||detectASIN(); if(!asin) return;
if (settings.showReviewMeta) injectReviewMeta(asin);
if (settings.showCamel) injectCamelLazy(asin);
if (settings.showKeepa) injectKeepaLazy(asin);
}
function injectCamelLazy(asin){
const div=document.createElement('div');
div.className='amazon-enhancer-box';
div.style.cssText='margin-top:10px;padding:10px;border:1px solid #ccc;';
div.innerHTML=`
<b>CamelCamelCamel:</b>
<div style="margin-top:6px;">
<a href="https://${locale}.camelcamelcamel.com/product/${asin}" target="_blank" rel="noopener">
<img data-src="https://charts.camelcamelcamel.com/${locale}/${asin}/amazon-new-used.png?force=1&zero=0&w=600&h=340"
alt="Price history (Camel)" style="max-width:100%;height:auto;opacity:.001;">
</a>
</div>`;
appendToTarget(div); lazyImageLoad($('img[data-src]',div));
}
function injectKeepaLazy(asin){
const div=document.createElement('div');
div.className='amazon-enhancer-box';
div.style.cssText='margin-top:10px;padding:10px;border:1px solid #ccc;';
div.innerHTML=`
<b>Keepa:</b>
<div style="margin-top:6px;">
<a href="https://keepa.com/#!product/1-${asin}" target="_blank" rel="noopener">
<img data-src="https://graph.keepa.com/pricehistory.png?used=1&amazon=1&new=1&domain=${locale}&asin=${asin}"
alt="Price history (Keepa)" style="max-width:100%;height:auto;opacity:.001;">
</a>
</div>`;
appendToTarget(div); lazyImageLoad($('img[data-src]',div));
}
function lazyImageLoad(img){
if(!img)return;
const io=new IntersectionObserver((es,o)=>{ es.forEach(e=>{ if(e.isIntersecting){ img.src=img.dataset.src; img.style.opacity='1'; img.removeAttribute('data-src'); o.unobserve(e.target); } }); },{rootMargin:'200px'});
io.observe(img);
}
function injectReviewMeta(asin){
const url=`https://reviewmeta.com/amazon${locale==='us'?'':'-'+locale}/${asin}`;
GM_xmlhttpRequest({ method:'GET', url, onload: res=>{
const doc=new DOMParser().parseFromString(res.responseText,'text/html');
const stars=doc.querySelector('#adjusted-rating-large')?.textContent?.trim();
const percent=Array.from(doc.querySelectorAll('small')).find(e=>/potentially unnatural/i.test(e.textContent||''))?.querySelector('span span')?.textContent?.trim();
const div=document.createElement('div');
div.className='amazon-enhancer-box';
div.style.cssText='margin-top:10px;padding:10px;border:1px solid #ccc;';
div.innerHTML = stars
? `<b>ReviewMeta Adjusted:</b> <span style="color:firebrick">${stars}/5</span><br><b>Fake Reviews:</b> <span style="color:firebrick">${percent||'—'}</span><br><a href="${url}" target="_blank" rel="noopener" style="color:green;">View on ReviewMeta</a>`
: `<b style="color:red;">ReviewMeta data not found.</b><br><a href="${url}" target="_blank" rel="noopener">Submit product</a>`;
appendToTarget(div);
}});
}
// -----------------------------
// PDP tweaks
// -----------------------------
function highlightReviews(){
const reviews=$$('.review');
reviews.sort((a,b)=>{
const ha=parseInt((a.innerText.match(/(\d[\d,]*)\s+people?\s+found this helpful/i)||[])[1]?.replace(/,/g,'')||'0',10);
const hb=parseInt((b.innerText.match(/(\d[\d,]*)\s+people?\s+found this helpful/i)||[])[1]?.replace(/,/g,'')||'0',10);
return hb-ha;
}).slice(0,3).forEach(el=>el.classList.add('highlighted-review'));
}
function autoSortReviews(){
const sel=$('select[name="sortBy"]');
if(sel){ if(sel.value!=='recent') sel.value='recent'; sel.dispatchEvent(new Event('change',{bubbles:true})); }
}
function forceVerifiedOnly(){
if(!settings.forceVerifiedPurchase)return;
const cb=$$('input[type=checkbox]').find(n=>/verified purchase/i.test(n.closest('label')?.textContent||''));
if(cb && !cb.checked){ cb.click(); return; }
const link=$$('a').find(a=>/verified purchase/i.test(a.textContent||'')); if(link) link.click();
}
function expandSections(){
$$('.a-expander-prompt, .a-expander-prompt-content, .a-expander-header').forEach(e=>e.click());
$$('span.a-expander-prompt, button[aria-label*="See more"]').forEach(b=>b.click());
}
function makeStickyPriceBox(){
const box=$('#corePrice_feature_div')||$('#unifiedPrice_feature_div');
if(box){ box.style.position='sticky'; box.style.top='0'; box.style.background='#fff'; box.style.zIndex=9999; box.style.borderBottom='2px solid #ccc'; }
}
function showSoldByBox(){ const el=$('#merchant-info'); if(el) el.style.border='2px dashed orange'; }
// -----------------------------
// Search: strict Amazon Monthly Payments detector (FIXED & DEBUGGABLE)
// -----------------------------
// currency sign pattern per locale
const money = {
us: '\\$',
uk: '£',
de: '€',
fr: '€',
es: '€',
it: '€',
ca: '\\$'
}[locale] || '\\$';
// Normalize whitespace + NBSP/zero-widths so “/ month” variants match
const normalize = (s) => (s||'').replace(/[\u00A0\u2000-\u200B]/g, ' ')
.replace(/\s+\/\s+/g, '/')
.replace(/\s+/g,' ')
.trim();
// INCLUDE patterns:
// 1) "$xx/(mo|month|monthly) for|x|over N months"
// (allows "Or $35.34/month for 3 months" and "… $35 monthly for 3 months")
const RX_MAIN = new RegExp(
`${money}\\s?\\d[\\d,]*(?:\\.\\d{2})?\\s*(?:\\/|\\s*per\\s+)?(?:mo|month|monthly)\\.?\\s*(?:for|x|over)\\s*\\d+\\s*(?:months|mos)\\b`,
'i'
);
// 2) "3 monthly payments" / "5 interest-free monthly payments"
const RX_PAYMENTS = /\b\d+\s+(?:interest[- ]?free\s+)?monthly\s+payments?\b/i;
// 3) explicit Amazon label
const RX_LABEL = /\bAmazon\s+Monthly\s+Payments?\b/i;
// EXCLUDE: third-party credit/financing. (No blanket "interest" or "/month" exclusion.)
const EXCLUDE = /\b(Affirm|Klarna|Afterpay|Zip|Prime\s*Visa|Store\s*Card|credit\s*card|APR|financ(?:e|ing)|lease|subscription)\b/i;
// Build a single normalized string for the whole result (text + aria-labels)
function resultText(result){
const t1 = result.textContent || '';
const t2 = Array.from(result.querySelectorAll('[aria-label]')).map(n=>n.getAttribute('aria-label')||'').join(' ');
return normalize(`${t1} ${t2}`);
}
const rescanMonthly = (function(){
function resultHasAmazonMonthly(result){
const t = resultText(result);
if (!t) return false;
if (EXCLUDE.test(t)) return false;
return RX_MAIN.test(t) || RX_PAYMENTS.test(t) || RX_LABEL.test(t);
}
function clearBadge(r){ $('.monthly-badge',r)?.remove(); }
function addBadge(r){
if($('.monthly-badge',r)) return;
const b=document.createElement('div');
b.className='monthly-badge';
b.textContent='💳 Monthly Payments';
if(getComputedStyle(r).position==='static') r.style.position='relative';
r.appendChild(b);
}
function run(){
const results=$$('[data-component-type="s-search-result"], .s-result-item');
if(!results.length) return;
for(const r of results){
clearBadge(r);
const t = resultText(r);
const excluded = EXCLUDE.test(t);
const matched = !excluded && (RX_MAIN.test(t) || RX_PAYMENTS.test(t) || RX_LABEL.test(t));
if (settings.debugMonthlyDetector) {
if (matched || excluded) {
const asin = r.getAttribute('data-asin') || '(no-asin)';
console.log(`[AmazonEnhancer] result asin=${asin} matched=${matched} excluded=${excluded} text=`, t);
}
}
if (matched){
if (settings.highlightMonthlyPayments) addBadge(r);
r.style.removeProperty('display');
} else if (settings.filterOnlyMonthly){
r.style.display='none';
} else {
r.style.removeProperty('display');
}
}
}
const debounced=debounce(run,150);
const api=(immediate=false)=> immediate?run():debounced();
api.force=()=>run();
return api;
})();
function showAllResults(){
$$('[data-component-type="s-search-result"], .s-result-item').forEach(r=> r.style.removeProperty('display'));
}
function primeOnlyFilter(immediate=false){
const run=()=>{
if(!settings.primeOnlyFilter){ showAllResults(); return; }
const results=$$('[data-component-type="s-search-result"], .s-result-item');
results.forEach(r=>{
const prime = r.querySelector('i[aria-label*="Prime" i], span[aria-label*="Prime" i], svg[aria-label*="Prime" i]');
r.style.display = prime ? '' : 'none';
});
};
return immediate?run():onIdle(run);
}
function hideSponsored(){
if(!settings.hideAds) return;
const sels=[
'[data-component-type="sp-sponsored-result"]',
'[data-cel-widget^="sp_"]',
'div.AdHolder',
'div[data-ad-feedback]'
];
sels.forEach(s=> $$(s).forEach(el=> el.style.display='none'));
$$('div[aria-label*="Sponsored" i]').forEach(el=> el.style.display='none');
}
function hideFbtAndRecs(){
if(!settings.hideFbtAndRecs) return;
const labels=[/Frequently bought together/i,/Customers who bought/i,/Products related to this item/i,/Inspired by your browsing history/i];
$$('h2, h3').forEach(h=>{
if(labels.some(rx=>rx.test(h.textContent||''))){
const cont=h.closest('.a-section')||h.parentElement; if(cont) cont.style.display='none';
}
});
}
// -----------------------------
// SPA handling
// -----------------------------
function pageInit(){
ASIN=detectASIN();
renderDataBoxes();
if(settings.highlightBestReviews) onIdle(highlightReviews);
if(settings.hideAds) onIdle(hideSponsored);
if(settings.showSoldBy) onIdle(showSoldByBox);
if(settings.stickyPriceBox) onIdle(makeStickyPriceBox);
if(settings.autoSortReviews) onIdle(autoSortReviews);
if(settings.expandReviewsQA) onIdle(expandSections);
if(settings.forceVerifiedPurchase) onIdle(forceVerifiedOnly);
if(settings.hideFbtAndRecs) onIdle(hideFbtAndRecs);
if(settings.highlightMonthlyPayments || settings.filterOnlyMonthly || settings.debugMonthlyDetector) rescanMonthly(true);
if(settings.primeOnlyFilter) primeOnlyFilter(true);
}
const rescanAll = throttle(()=>{
hideSponsored();
hideFbtAndRecs();
rescanMonthly(); // debounced
if (settings.primeOnlyFilter) primeOnlyFilter(true);
}, 400);
const mo=new MutationObserver(()=>{ rescanAll(); });
mo.observe(document.body, {childList:true, subtree:true});
(function hookHistory(){
const push=history.pushState;
history.pushState=function(){ const r=push.apply(this,arguments); setTimeout(pageInit,50); return r; };
window.addEventListener('popstate',()=> setTimeout(pageInit,50));
})();
// Start
pageInit();
})();