Is there a way to change the element-style of the img inside the iframe using jquery. The iframe epubjs-iframe change the id on every page load. What I want is to change the style = heigh="98%" to max-height:467 and width:auto on every page load.
Html-code
Yes, IF the src of your iframe is pointing to SAME domain.
Eg.
var iframe = $("#iframe"); // Selector to get the iframe
$("#elemInIframe", iframe.contents()).css("color", "blue"); //Or whatever method you want
And Of course, if the src of iframe is in different domain, due to security reasons, You will not be able to access the contents in javascript. Sorry about the same!!
Not know if it is the case here, but when working with iframes You may need to overcome Same Origin Policy: https://developer.mozilla.org/en-US/docs/Web/Security/Same-origin_policy
You can use PostMessage for cross-frame communication. To do so:
You need to be in control of the code both host page and embedded one
Or use the PostMessage API provided by page You want to embed
More about PostMessage: https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage
Related
I am trying to run some javascript inside an iframe after it loads and am having trouble. I'm not sure if it means my concept of what is happening is wrong or if my code is just wrong.
What I want to do is load a javascript file in the iframe environment and then call a function. (the iframe contents are static web pages captured with singlefile and served from my server. I want to be able to pop up menus for the images in the iframe page). Is this possible, or is it blocked for security considerations? I can get the contentDocument from the iframe and see what is in it but not make any changes to it. Adding a load event listener to the iframe runs in the top-level DOM, not the iframe.
An ugly workaround would be to add a line loading the script to each of my served html files, but I'm reluctant to do that since it seems kind of fragile. Is that my only option?
you can select the iframe element and access its internal window object.
to do this first assign an id to your iframe element
<iframe id="chosen-iframe" ...></iframe>
and to access the window use the following
const iframe = document.getElementById('chosen-iframe');
const iFrameWindowElement = iframe.contentWindow;
and with access to the window, you can create a script tag that contains the script you want to inject inside the iframe
var injectedScript = iFrameWindowElement.document.createElement("script");
injectedScript.append(...);
iFrameWindowElement.document.documentElement.appendChild(script);
In iframe I have opened another website and want to change the div content within the iframe.
I have tried this but not working
$('#iframe #divId').html('New text');
If the website inside the iframe is from another origin (or simplified - from another domain), then JavaScript's security policy doesn't allow such operations.
But if the website is from the same origin, then using jQuery call
$("#iframe").contents().find("#divId").html("New text");
but be sure to call it when the framed document is loaded.
wrap that iframe within a div and try this
$('#iframe').parent("div").html('New text');
Assume we have a window and an iframe with some javascript in it. The iframe sourcecode is defined directly in "srcdoc" attribute of the iframe.
Is it possible to somehow force the browser to behave like the iframe is loaded from another domain?
I mean I don't want the javascript in the iframe to be able to access the main window via "window.parent" or anything like that, because the iframe contents is not trusted. But the problem is that it's stored on the same domain and I even want to use the same request to load both the main window and the iframe contents (with that "srcdoc" attribute).
So is it possible at all?
Thanks!
You could prepend the string:
"<script> parent = top = null; </script>"
To the srcdoc. That should prevent the rest of the code in the srcdoc form accessing the parent through window.parent and window.top.
I'm not sure if there are any other ways to access the parent of an iframe.
Is it possible ?
I've made on page with iframe, I want a script that'll click automatically inside in one iframe's link.
But I also want that script to detect half link, I mean the link which is in iframe changes everytime, but the first part of the link doesnt change, so the javascript should detect half link which doesnt change and redirect to it...
Why don't you write a "client" library and import it within iFrame. This library listen to a message from HTML5 postMessage call with certain attribute and react appropriately. Since you have access to the parent object through the event object (or window.parent), you can also send response back with the result. This way, it doesn't matter if it's cross-domain and as long as this library exists, you can communicate back-and-forth and even has the iFrame initiate if you write it properly.
I can't share the code with you since it's our proprietary library, but that's part of the idea.
If the content of your iframe is from a different domain, you can't. Allowing this would be a major security concern.
If your iframe content is in the same domain, then you can access the iframe content through its contentWindow property. You can then work with your iframe link the same way you would if the link was in the main page.
I have an iframe embedded on my webpage and I'd like to edit certain parts of it using javascript. Is this possible and how would I do it?
Since the iframe is loading content from another domain — no. You'll hit the same origin policy.
According to the HTML DOM spec (level 2), you can reach the child DOM by using the .contentDocument property of the iframe's DOM node.
But, of course, no browser lets you do that across domains anymore...
You can get the iframe document by doing this:
document.getElementById(iframeId).contentDocument
That is if you own the page loaded in the iframe.