Price Tracker · 价格跟踪

核心能力

任意网页价格跟踪

支持跟踪任意网站的价格——不仅限于电商平台。京东、淘宝、天猫、亚马逊、ebay 等主流电商已内置优化，其他网站同样可用。

所见即所取

点击商品页上的任意价格数字即可跟踪——无论是到手价、促销价、会员价还是划线价，你点哪个就跟踪哪个。系统通过用户自选选择器精确定位，不依赖平台接口，不怕页面改版。

价格历史与图表

自动记录每次变价（价格未变不产生记录，节省存储）。最多保留 500 个价格点 / 180 天历史。商品详情页底部注入价格图表面板，直观查看价格走势。

降价通知

价格下降时自动发送系统通知，即使浏览器在后台也能第一时间收到提醒。

智能刷新机制

手动刷新：点击「刷新全部」，当前标签页依次导航到每个商品页直读真实价格。
自动刷新：每 3/6/12/24 小时（可配置）自动全量检查一次。
取价优先级：主标签页直读（你看到的）→ 后台标签页兜底（真实渲染环境）。

云端同步

商品数据自动同步到云端（通过 Todo 子任务），多设备间无缝切换。

使用流程

添加跟踪商品

打开侧栏（浏览器右上角扩展图标 → 打开侧栏面板）
点击「+」按钮，粘贴任意商品页链接
点击「选择价格」→ 页面进入选择模式（光标变十字）
在商品页上点击你要跟踪的价格数字
点击商品封面图片（可选，留空则自动提取）
确认添加

查看与刷新

侧栏列表：显示所有跟踪商品、当前价、涨跌趋势、上次检查时间
点击商品卡片：主窗口打开商品详情页，底部注入价格图表
单条刷新：点击商品卡片上的「刷新」按钮
批量刷新：点击顶栏「刷新全部」按钮，系统依次导航到每个商品页取价

校准选价

如果价格元素位置变化（页面改版、价格数字换了位置），点击商品卡片上的「校准选价」按钮，重新点选价格元素即可。

支持平台

平台	域名	特殊优化
京东	`item.jd.com`	ASIN 提取、SPA 渲染等待
淘宝	`item.taobao.com`	id + skuId 保留、跟踪参数剥离
天猫	`detail.tmall.com`	id + skuId 保留、参数名大小写兼容
亚马逊	`amazon.com/dp/ASIN`	ASIN 提取、多站点支持（.co.jp/.de/.fr 等）
ebay	`ebay.com`	基础支持
任意网站	无限制	通用探针 + 用户自选选择器

高级特性

2:8 分屏体验

侧栏（约 20% 宽度）展示关注列表，主窗口（约 80% 宽度）展示商品详情与价格图表，形成沉浸式购物体验。

状态提示条

批量刷新时，商品页顶部显示蓝色进度条，实时显示「已检查 N/M 件（成功 X / 失败 Y）」，整批完成后 3 秒淡出。

频控保护

手动刷新最小间隔 90 秒（防止高频触发平台安全监控）；同商品冷却 3 分钟（避免重复取价）；批次间隔 8~15 秒随机抖动（模拟人类操作节奏）。

Core Capabilities

Track Prices on Any Page

Track prices on any website — not limited to e-commerce platforms. JD, Taobao, Tmall, Amazon, eBay and other major e-commerce sites have built-in optimizations. Other websites work too.

What You See Is What You Track

Click any price number on a product page to track it — whether it's the final price, promo price, member price, or strikethrough price. The system uses a user-selected CSS selector for precise targeting. No platform API dependency, immune to page redesigns.

Price History & Charts

Automatically records every price change (no record created if price is unchanged, saving storage). Keeps up to 500 price points / 180 days of history. A price chart panel is injected at the bottom of the product detail page for intuitive trend viewing.

Price Drop Alerts

Automatically sends system notifications when prices drop. You'll get alerted instantly even when the browser is in the background.

Smart Refresh Mechanism

Manual refresh: Click "Refresh All" and the current tab navigates to each product page sequentially to read real prices.
Auto refresh: Automatically checks all items every 3/6/12/24 hours (configurable).
Price reading priority: Active tab direct read (what you see) → Background tab fallback (real rendering environment).

Cloud Sync

Product data automatically syncs to the cloud (via Todo subtasks) for seamless switching between devices.

How to Use

Add a Product to Track

Open the sidebar (extension icon at the top-right → Open sidebar panel)
Click the "+" button and paste any product page URL
Click "Select Price" → The page enters selection mode (cursor becomes a crosshair)
Click the price number you want to track on the product page
Click the product cover image (optional, auto-extracted if left empty)
Confirm to add

View & Refresh

Sidebar list: Shows all tracked products, current price, price trend, last check time
Click a product card: Opens the product detail page in the main window with a price chart injected at the bottom
Single refresh: Click the "Refresh" button on the product card
Batch refresh: Click the "Refresh All" button in the top bar. The system navigates to each product page sequentially to fetch prices

Recalibrate Price Selection

If the price element position changes (page redesign, price number moved), click the "Recalibrate" button on the product card to re-select the price element.

Supported Platforms

Platform	Domain	Optimization
JD.com	`item.jd.com`	ASIN extraction, SPA render waiting
Taobao	`item.taobao.com`	id + skuId retention, tracking parameter stripping
Tmall	`detail.tmall.com`	id + skuId retention, case-insensitive parameter names
Amazon	`amazon.com/dp/ASIN`	ASIN extraction, multi-site support (.co.jp/.de/.fr, etc.)
eBay	`ebay.com`	Basic support
Any website	Unlimited	Universal probe + user-selected CSS selector

Advanced Features

2:8 Split Screen

The sidebar (~20% width) displays your watchlist, while the main window (~80% width) shows product details and price charts, creating an immersive shopping experience.

Status Progress Bar

During batch refresh, a blue progress bar appears at the top of the product page showing "Checked N/M (Success X / Failed Y)" in real-time. It fades out 3 seconds after the batch completes.

Rate Limiting Protection

Manual refresh minimum interval: 90 seconds (prevents triggering platform security monitoring); Same product cooldown: 3 minutes (avoids duplicate price fetching); Batch interval: 8–15 seconds random jitter (simulates human operation rhythm).