Retrieving iframe contents upon refreshing the page

I have been facing a challenge trying to extract data from a school portal's Peoplesoft page that contains an iframe element. The issue arises when I navigate within the portal, such as clicking on a button to search for classes, causing changes in the displayed elements without altering the source code (as confirmed by inspect element tool). While I can access elements on the homepage using JavaScript, I struggle to do so after the page reloads and new elements are injected into the iframe. How can I modify my script to access these post-reload elements?

var iframe = document.getElementById("id of iframe");
var innerDoc = iframe.contentDocument || iframe.contentWindow.document;
var element = innerDoc.getElementById("name of id desired in iframe");
javascriptdomiframepeoplesoft

Answer №1

After navigating, the document within the iframe changes, causing your innerDoc variable to hold onto the old document. To address this issue, you can create a function that retrieves the current document instead of relying on a static variable:

var iframe = document.getElementById("id of iframe");
function getInnerDoc() {
    return iframe.contentDocument || iframe.contentWindow.document;
};
var element = getInnerDoc().getElementById("name of id desired in iframe");

Based on your feedback, it appears that the entire iframe is being stored in a variable and not being refreshed. To ensure you are always working with the most up-to-date content, consider implementing a function to retrieve the iframe document whenever needed:

function getIframeDocument(iframeId) {
    var iframe = document.getElementById(iframeId);
    return iframe.contentDocument || iframe.contentWindow.document;
};
var element = getIframeDocument().getElementById("name of id desired in iframe");

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