Team Replaces Planned PDF Library With Print Stylesheet for Free Invoice Tool

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The developers of Sheaf, a time tracking and invoicing app, planned to add a PDF library to create a free invoice generator. They considered the costs of server-side rendering, including rate limiting and handling sensitive client data, and instead opted for a browser print stylesheet. Users fill in a form, the preview is styled with plain HTML, and they save the result as a PDF through the browser's print dialog. Because all data stays in localStorage on the user's device, the team avoided storing or protecting any client information. The same approach was then reused for a time card calculator and an hourly rate calculator.

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