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Zig comptime and arena allocation make type-safe HTML templating practical

lalinsky.com 6 min read Editor score 7/10

The author uses Zig's comptime and arena allocators to build high-level HTML generation without manually freeing the many strings involved. It is a concrete example of applying low-level language features to web development.

What: zt is a Zig templating library designed for type-safe HTML generation with escaped inputs and direct output writing.
How: Templates are parsed and transpiled to Zig during zig build; generated code writes to std.Io.Writer, and the compiler checks template parameters.
Why it matters: Compile-time checks and arena allocation help make low-level web development manageable without runtime template errors or manual string cleanup.

Templates are transpiled during the build into Zig code that writes rendered output to a writer. Sketched from the article's own text.

Read on lalinsky.com → Hacker News · 93 comments Lobsters

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