how_do_you_avoid_receiving_postmessages_from_attackers.md

How do you avoid receiving postMessages from attackers

How do you avoid receiving postMessages from attackers?

To prevent receiving messages from attackers, always validate the origin property of the message and ensure it matches the trusted source. You can also check the message's content for additional security.

Example:

window.addEventListener('message', (event) => {
  if (event.origin !== 'https://trusted.com') {
    return;
  }
  // Process message
});

Tags: advanced, JavaScript, Security