Is it possible to extract data from a webpage in one tab and then input it into a textarea on a different page opened in a separate browser tab using Javascript and Greasemonkey?
Is it possible to extract data from a webpage in one tab and then input it into a textarea on a different page opened in a separate browser tab using Javascript and Greasemonkey?
GM_setValue to store the data. If necessary, open the next website using GM_openInTab.GM_getValue and insert it into the text area.This process is not too complicated with Greasemonkey, but it's important to load the textarea-page after the table-page.
Here's an Example:
// @include http://website1.com/*
// @include http://website2.com/*
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js
$(document).ready(function() {
if( $("#divfromsite1").length )
{
GM_setValue("pastetext", $("#gettable").html() );
GM_openInTab("http://website2.com/");
}
else
{
$("#pastetextarea").val( GM_getValue("pastetext","") );
}
});
Completing this task can be quite challenging. It's not impossible, but it does require a lot of effort and expertise.
Cross-document messaging involves sending messages between different pages using JavaScript. The key requirement for this to work is that the documents must have the same origin. This means they need to come from the same domain, port, and protocol. It works seamlessly when you have one page embedded within an iframe on another page. In such cases, you can follow these steps:
window object of the embedded page and set up an event listener for the receiveMessage event.window[name].postMessage(msg, url)data property of the message event.Your challenge arises from wanting to communicate across tabs. While I lack experience in cross-tab communication, I believe redesigning your application might be necessary if multiple tabs need to interact. Users may find changes made in their browser confusing if they are not immediately visible.
If you still wish to proceed, explore how different browsers allow access to their tabs. For Firefox, check out resources like Get window object from tab, and for Chrome, consider starting with How do I get the window object for a specific tab if I have that tab's tabId?.
Given the recent edits to your question involving Greasemonkey, this solution may or may not align with your requirements. Unfortunately, my knowledge of Greasemonkey is limited, but I am more than willing to help with an XDM-based solution instead.
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