To focus a tab or window, we can use the `window.focus()` method. This method is available on any `Window` object, which includes the global `window` object as well as any `iframe` or pop-up windows.
To focus the current tab or window, we simply need to call `window.focus()` from within the context of that tab or window. For example:
// focus the current window window.focus();
If we want to focus a different tab or window, we first need to obtain a reference to that window. We can do this using the `window.open()` method, which opens a new window and returns a reference to it. For example:
// open a new window and obtain a reference to it var newWindow = window.open('https://www.example.com'); // focus the new window newWindow.focus();
Alternatively, if we already have a reference to a window (e.g. from an `iframe` or pop-up), we can simply call `windowReference.focus()` on that window reference.