JavaScript Tutorial #26 - Post Message

Welcome to Software Interview Prep! Our channel is dedicated to helping software engineers prepare for coding interviews and land their dream jobs. We provide expert tips and insights on everything from data structures and algorithms to system design and behavioral questions. Whether you're just starting out in your coding career or you're a seasoned pro looking to sharpen your skills, our videos will help you ace your next coding interview. Join our community of aspiring engineers and let's conquer the tech interview together!
----------------------------------------------------------------------------------------------------------------------------------------
`postMessage` is a method in JavaScript that provides a way for different windows or frames within a web application to communicate with each other, even if they originate from different origins (domains). It allows data to be sent securely and asynchronously between windows or frames, such as between a parent window and its child iframes or between different browser tabs or windows.

The `postMessage` method allows you to send a message (which can be any JavaScript object or data) from one window (the sender) to another window (the receiver) and vice versa. This is particularly useful for cross-origin communication and coordinating actions between different parts of a web application.

This mechanism allows secure communication between windows or frames from different origins, helping to prevent cross-site scripting (XSS) attacks and ensuring that data is only exchanged between trusted sources.

`postMessage` is commonly used in various scenarios, such as:

- Implementing cross-origin communication between a main application and embedded iframes.
- Coordinating actions and sharing data between different browser tabs or windows of the same application.
- Building multi-window web applications that require interaction between separate windows.

It's important to handle messages with care, validate message origins, and ensure that the data exchanged is safe and expected to maintain the security of your web application.

[tuku_mann]

So cool, thank you and keep on going!