Changed
A printed page is a document again — the header, sidebar and footer no longer print.
AdminLTE 3 left all three off the paper. v4 printed them, and on a page that prints as a real document the result was the invoice in #6113: 200px of every sheet spent on a menu the reader cannot click, the invoice squeezed into what was left — its own table wrapping "Pro plan subscription" across three lines — and the sidebar's 85 menu items running past the foot of the first sheet. A one-page invoice printed as two, the second all but empty.
The content now gets the full width of the paper. Nothing else about the print styles changed: link targets are still printed after external links, buttons still keep an outline, everything is still black on white.
Both ways back are still there, and both are now honoured properly:
<!-- print the whole shell, as 4.0–4.8 did -->
<html lang="en" data-lte-print="app"><!-- or bring back one piece: .d-print-flex for the header (it is a navbar),
.d-print-block for the sidebar and footer -->
<aside class="app-sidebar bg-body-secondary shadow d-print-block">…</aside>.d-print-none still hides anything you don't want on paper, in either mode. data-lte-print is now matched per token, so data-lte-print="plain app" sets both; data-lte-print="plain" is unaffected.
Reported by @johnnyq.
Fixed
The layout kept its viewport-sized dimensions in print (#6113).
.app-wrapper carries min-height: 100vh and max-width: 100vw, and neither was cleared for print — even though the print block deliberately rewrites that same element's grid. Paper has no viewport to fill: the wrapper reserved a full sheet however short the page was, which is why the printed invoice put its footer at the foot of a sheet of empty grey with the content in the top third, and why anything following the wrapper opened a new page. Both are now reset in print, along with the max-width: 100vw on the header, main and footer.
The print block set display on elements it did not need to.
Forcing display: block on .app-sidebar is what made .d-print-none unable to hide it before 4.6.0, and the same shape would have made .d-print-* unable to show it now. Printing the shell is a matter of not hiding it, so the rules that hide it are scoped out instead, and nothing in the print block forces a display value on the header, sidebar or footer any more.
adminlte.js is untouched; adminlte.css grows by 64 bytes gzipped.
npm install admin-lte@4.9.0<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/admin-lte@4.9.0/dist/css/adminlte.min.css" />
<script src="https://cdn.jsdelivr.net/npm/admin-lte@4.9.0/dist/js/adminlte.min.js"></script>Full notes: CHANGELOG
Full Changelog: v4.8.5...v4.9.0