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Angular 2 Iframe To Parent Communication

In Angular 2, enabling communication between an iframe and its parent can be essential for creating dynamic web applications. By establishing a bridge for these components to exchange data and trigger actions, you can enhance the functionality and interactivity of your project. Let's dive into how you can achieve this iframe-to-parent communication in Angular 2.

## What is an Iframe?

An iframe, short for inline frame, is an HTML element that allows you to embed one webpage within another. It essentially creates a window into another document, enabling you to display content from a different source seamlessly on your webpage.

## Why Communication Between Iframe and Parent Matters?

When working with iframes in Angular 2, the need for communication between the iframe and its parent arises when you want to synchronize actions, share data, or trigger events between these two separate contexts. By establishing this communication bridge, you can create a more cohesive user experience and enable seamless interaction between the iframe content and the parent application.

## Establishing Communication

To facilitate communication between an iframe and its parent in Angular 2, you can utilize the `postMessage` method provided by the `Window` object. This method allows you to send messages securely between different windows or iframes, regardless of their origins.

## Sending Messages from Iframe to Parent

To send a message from the iframe to its parent, you can use the following code snippet:

Typescript

window.parent.postMessage('Message from iframe', 'https://parent-domain.com');

In the code above, `window.parent` refers to the parent window of the iframe. You can replace `'Message from iframe'` with the data you want to send and `'https://parent-domain.com'` with the URL of the parent window to ensure secure communication.

## Receiving Messages in the Parent

To receive messages sent from the iframe, you need to listen for the `message` event in the parent window. Here is an example of how you can handle incoming messages:

Typescript

window.addEventListener('message', (event) => {
  if (event.origin === 'https://iframe-domain.com') {
    console.log('Message received from iframe:', event.data);
    // Handle the message data as needed
  }
});

In the code snippet above, the event listener checks the origin of the message to ensure it is coming from a trusted source before processing the data.

## Security Considerations

When implementing iframe-to-parent communication, it is crucial to consider security implications. Always validate the origin of incoming messages to prevent cross-site scripting attacks and ensure that your application remains secure.

By following these steps and understanding the fundamentals of iframe-to-parent communication in Angular 2, you can enhance the functionality and interactivity of your web application. With the ability to exchange data and trigger actions seamlessly between these components, you can create a more dynamic and engaging user experience.

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