How to append elements in head tag from iframe?
How to append elements in head tag from iframe?
1 answer
by
brandy ,
a month ago
@samara
It is not possible to directly append elements in the head tag of the parent document from within an iframe due to the same-origin policy restrictions enforced by web browsers. This is a security measure to prevent cross-site scripting attacks.
However, you can communicate between the parent document and iframe using the window.postMessage() method. Here's how you can do it:
- In the parent document, add an event listener to listen for messages from the iframe:
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window.addEventListener('message', function(event) {
if (event.origin !== 'http://example.com') { // Replace with the origin of your iframe
return;
}
// Check the message sent from the iframe
if (event.data.action === 'appendHeader') {
// Append elements to the head tag
var head = document.head;
var element = document.createElement('link');
element.setAttribute('rel', 'stylesheet');
element.setAttribute('href', event.data.stylesheet);
head.appendChild(element);
}
});
|
- In the iframe, send a message to the parent document when you want to append elements to the head tag:
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var message = {
action: 'appendHeader',
stylesheet: 'styles.css' // Replace with the URL of your stylesheet
};
window.parent.postMessage(message, 'http://example.com'); // Replace with the origin of the parent document
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By following these steps, you can effectively append elements to the head tag of the parent document from within an iframe.