pdflib-syntax-fonts

What problem does it solve?

Prevents runtime failures and incorrect rendering caused by using pdf-lib standard fonts for text that contains characters outside the WinAnsi subset, and guides correct embedding of custom fonts so Unicode, CJK, and other scripts render reliably.

Core Features & Use Cases

• Correct Font Embedding: Explains when to use StandardFonts, embedStandardFont, and when to register fontkit and embed custom TTF/OTF bytes.
• Unicode and Script Support: Shows how to use fontkit with custom fonts to render Cyrillic, CJK, Arabic, emoji, and other non-WinAnsi characters.
• Text Measurement & Subsetting: Covers measurement methods, centering and alignment patterns, and subsetting decisions to balance file size and editability.
• Anti-Patterns and Fixes: Lists common runtime errors (WinAnsi encoding, missing registerFontkit, forgetting await) and concrete fixes for production workflows.

Quick Start

Register fontkit, await embedding of a Unicode-capable font file, and use the resulting PDFFont to draw and measure text so non-Latin characters render without WinAnsi errors.