Purpose

Fix cookie consent banner reappearing after users make their choice. The banner was showing up again on subsequent page visits even after users clicked "Allow" or "Decline", causing a poor user experience.

Changes

Critical Bug Fixes:

• Fixed consentDenied() function which was incorrectly storing true instead of false when users declined cookies
• Replaced faulty consent checking logic that treated both granted and denied consent the same way

Improved Cookie Handling:

• Enhanced storeChoice() to set proper cookie attributes (1-year expiration, path scope, SameSite security)
• Updated loadChoice() to return null for no stored choice, distinguishing it from boolean consent values

Enhanced Logic Flow:

• Implemented three-way consent checking:

  • stored === true: Enable tracking and hide banner
  • stored === false: Hide banner without enabling tracking
  • stored === null: Show banner for first-time users

Safety Improvements:

• Added null checks before removing DOM elements to prevent JavaScript errors
• Only call Matomo's rememberCookieConsentGiven when consent was actually granted

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.

CLA acceptance

By submitting the contribution I accept the terms and conditions of the
Contributor License Agreement v1.0

• link: https://developers.concordium.com/CLAs/Contributor-License-Agreement-v1.0.pdf

• I accept the above linked CLA.