GDPR合规中@@History/@@scroll|# Cookie的来源及用途咨询

Great question—this is a tricky one because that cookie name isn’t standard for core WordPress or most widely used plugins. Let’s break down what we can deduce and how to track down its origin:

What It Likely Does (Based on the Name) #

Your initial guess is spot-on. The scroll and History keywords strongly suggest this is a functional cookie used to remember a user’s scroll position on the site. For example:

• If a user scrolls halfway down a long page, clicks a link to another page, then uses the back button, this cookie would let the site jump back to their last scroll position instead of resetting to the top.
• It’s almost certainly not a tracking cookie (unless the code is repurposing it for that, which is unlikely given the naming).

How to Find Its Origin #

1. Core WordPress? No Way #

Core WordPress never uses this naming convention. Its default cookies are all prefixed with wordpress_, wp-settings-, or wp-auth-—so this is definitely from a third-party tool or custom code.

2. Check Plugins & Themes #

This is the most common source:

• Plugin Test: Disable all plugins, refresh your site, and check if the cookie disappears. If it does, re-enable plugins one by one until the cookie comes back—you’ll find the culprit.
• Theme Test: Switch to a default WordPress theme (like Twenty Twenty-Four). If the cookie is gone, your custom theme is generating it.
• Code Search: Dig into your theme and plugin files (use your hosting’s file manager or a local editor) to search for setcookie (PHP) or document.cookie (JavaScript) paired with keywords like scroll, History, or the full cookie name @@History/@@scroll|#.

3. Custom Code? #

It could also be a snippet added directly to your site:

• Check your theme’s functions.php file for custom PHP cookie logic.
• Look in your theme’s JS files (like main.js or custom.js) for frontend code that saves scroll position to a cookie.

Quick Way to Confirm Its Purpose #

1. Delete the cookie via your browser’s dev tools (Application > Cookies > Select your site > Find and delete @@History/@@scroll|#).
2. Scroll down a page on your site, navigate away, then come back.
3. Check if the cookie is recreated, and look at its value—if it’s a number (like 500), that’s the pixel position of your scroll. This confirms it’s purely for UX, not tracking.

内容的提问来源于stack exchange，提问作者TwoLunch