chrome.printing
This sample demonstrates all four methods of the chrome.printing namespace.
Overview
The chrome.printing namespace only works on ChromeOS. The sample demonstrates how to get a list of available printers and display it to a user. A 'Print' button sends a sample PDF to the selected printer and makes a 'Cancel Printing' visible. This button is visible while the print job's status is "PENDING" or "IN_PROGRESS". Note that on some systems, the print job is passed to the printer so quickly that you may never see the 'Cancel Printing' button.
Calling submitJob() triggers a dialog box asking the user to confirm printing. Use the PrintingAPIExtensionsAllowlist policy to bypass confirmation.
Implementation Notes
Note that the submitJob() function throws an error when returning a promise (crbug: 1422837).