Get Consent

Why It Matters

For developers working with QR codes, Get Consent is a critical step in ensuring compliance with data protection laws and in maintaining a transparent user experience. Without explicit consent, QR code redirects can be perceived as deceptive, leading to user distrust, legal risks, and potential platform penalties.

From a security perspective, Get Consent prevents malicious actors from exploiting QR codes to redirect users to unsafe domains or trigger unintended actions. It also supports PixQR’s operational workflows by ensuring that all user interactions are intentional and monitored.

From an accessibility standpoint, explicit consent improves the usability of QR code experiences for users with disabilities who rely on clear, predictable interactions. It also helps maintain scan reliability by reducing unexpected behavior that could confuse or mislead users.

How It Works

The Get Consent mechanism typically involves presenting a clear prompt or modal to the user before redirecting them to a destination URL. This interaction must be designed to be intuitive, non-intrusive, and aligned with the user’s expectations.

• When a user scans a QR code, the system evaluates whether the destination requires consent before proceeding.
• The consent prompt must clearly state what the user is agreeing to, such as “You are about to be redirected to an external site.”
• Consent is usually stored in a cookie or local storage for session tracking and may be linked to analytics or compliance logging.
• The system must ensure that consent is revocable and that users can opt out of tracking or data collection.
• For PixQR, the Get Consent process is integrated into the QR code generation workflow, allowing developers to configure consent behavior at the time of creation.

Quick Reference

Basic Example

PixQR Example QR

This QR links directly to this glossary page, so printed notes, onboarding docs, and support material can bring scanners back to the current reference.

/glossary/qr-code-best-practices/qr-code-best-practices-get-consent

The following example demonstrates a minimal implementation of a consent prompt before redirecting a user to an external URL.

function handleQRCodeScan(url) {
  const consent = confirm("You are about to be redirected to an external site. Continue?");
  if (consent) {
    window.location.href = url;
  }
}

This code checks for user consent using a browser confirm dialog before redirecting. It is suitable for basic testing but lacks production-grade features like logging, persistence, or accessibility support.

Production Example

A production-ready implementation of Get Consent involves a modal dialog, secure storage, and integration with analytics and compliance tools.

function handleQRCodeScan(url) {
  const storedConsent = localStorage.getItem('qr_consent');
  if (storedConsent === 'granted') {
    window.location.href = url;
  } else {
    showConsentModal(url);
  }
}

function showConsentModal(url) {
  const modal = document.getElementById('consent-modal');
  const confirmBtn = document.getElementById('confirm-consent');
  confirmBtn.onclick = () => {
    localStorage.setItem('qr_consent', 'granted');
    window.location.href = url;
  };
  modal.style.display = 'block';
}

This version uses a modal dialog to request consent and stores the user’s choice in localStorage. It avoids browser confirm dialogs, which are less accessible, and integrates with PixQR’s privacy-conscious architecture.

Common Mistakes

• Skipping consent prompts entirely, leading to unexpected redirects and user confusion.
• Using generic consent messages that do not clearly explain the destination or purpose.
• Storing consent in insecure locations like session storage or unencrypted cookies.
• Not providing a way for users to revoke consent or view their choices.
• Ignoring accessibility guidelines, such as failing to support keyboard navigation or screen readers in consent UIs.

Security And Production Notes

• Always use secure, HTTPS-based storage for consent data to prevent tampering.
• Implement strict validation for URLs to prevent open redirect vulnerabilities.
• Ensure that consent prompts are not easily bypassed by automation or browser extensions.
• Log consent events for compliance and audit purposes, especially in regulated environments.
• Design consent UIs with accessibility in mind to meet WCAG standards and support inclusive experiences.

Related Concepts

Get Consent is closely related to several other concepts in QR code and web development:

• Dynamic Redirects: Consent often governs when and how redirects are triggered.
• Privacy Controls: Consent is a core element of user privacy management.
• Scan Tracking: Consent is required before tracking or logging scan events.
• Brand Safety: Ensures that QR code experiences are transparent and aligned with brand policies.
• GDPR/CCPA Compliance: Consent is a legal requirement for data collection and processing.

Further Reading

• MDN Web Docs
• WHATWG HTML Standard