In the scenario of my popup window, I am attempting to make reference to window.top using this link:
My goal is to access the main window's document from the popup, however when I use window.top, it returns undefined.
In the scenario of my popup window, I am attempting to make reference to window.top using this link:
My goal is to access the main window's document from the popup, however when I use window.top, it returns undefined.
If you need to reach the source of your popup, use:
window.opener
To get access to the top page of your source (for example, if your source is within an iframe), use:
window.opener.top
Once you are on the desired source window, you can manipulate the document to change its content or adjust the URL.
To align your popup with the top position of the opening browser window and center it horizontally within the window, you can utilize the following code in modern browsers:
window.moveTo(window.opener.screenX + (window.opener.outerWidth / 2) - (window.outerWidth / 2), window.opener.screenY)
The properties outerWidth, screenX, and screenY are compatible with IE9 and newer versions as well as modern browsers.
The function moveTo has been a long-standing feature.
In this scenario, we determine the left position of the opening browser window, calculate its center by subtracting half the width of the popup, and set the popup's top to match the top position of the opening browser window using window.opener.screenY.
Most browsers have pop-up blockers enabled by default, requiring user interaction to allow pop-ups. For example, my web application utilizes a pop-up window for previewing results. Many other applications use positioned div elements for dialogs. Without knowledge of your specific application, I cannot provide tailored advice on the best approach to take.
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