Business Card Generator Generate printable business card layouts in PDF format.

Under the hood, it utilizes React hooks such as useState and useCallback to manage state changes and optimize performance. The generate function is where the core logic resides, using the pdf-lib library to create a new PDF document and embed fonts like StandardFonts.Helvetica and HelveticaBold. It calculates grid coordinates based on the selected cards per page option, which ranges from 2 to 10, and positions each card within an A4-sized page. The tool then renders contact information with hierarchical typography and adds cut-line borders around each card. When the user clicks the generate button, it saves the PDF document as a blob and creates a downloadable URL using the URL.createObjectURL method from the Browser API. This approach enables users to download their generated business cards as a printable PDF file without requiring external services.

The grid system is crucial for efficient printing, as it allows for adjustable margins and gutter sizes to ensure precise cutting. For instance, when 10 cards are selected per page, the tool calculates the optimal layout to minimize waste and make the most of the A4 page size. It uses a combination of React components, such as InputWithHelp, to handle user input and manage state changes. The pdf-lib library is used to create and manipulate PDF documents, providing a robust set of features for generating complex layouts like business cards. By leveraging these technologies, it provides a convenient way to generate printable business cards with professional typography and precise layout controls.

It also handles errors gracefully by setting the error state when an exception occurs during the generation process, providing informative messages to help users troubleshoot any issues that may arise. The use of async/await syntax ensures that the code is easy to read and maintain, while the useCallback hook helps prevent unnecessary re-renders and improves overall performance. Overall, it demonstrates a solid understanding of React, pdf-lib, and browser APIs to deliver a functional business card generator that meets the needs of professionals and entrepreneurs alike.