jQuery如何在对话框中关闭对话框?

If I open a dialog like so:

如果我打开这样的对话框:

$('<iframe id="externalSite" class="externalSite" src="https://www.example.com" />').dialog({
        autoOpen: true,
        width: 800,
        height: 500,
        modal: true,
        resizable: true
    })
$(