francisrstokes/construct-js

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1370 stars · 29 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

construct-js is a TypeScript library for declaratively building byte-level data structures with typed fields, nested structs, pointers, sizeof fields, and per-field endianness. It outputs standard Uint8Array values and works in both the browser and Node.js.

Use cases

• assemble binary file formats in javascript
• build binary protocols without manual ArrayBuffer offset math
• create structs with specific endianness and alignment
• generate binary data for embedded or hardware interfaces from node
• serialize fixed-layout binary headers
• construct packed binary payloads in the browser

When to choose

• you need to hand-assemble or define binary layouts in JS/TS
• you want pointers, sizeof, alignment, and endianness control in a small dependency
• you need output as a standard Uint8Array for browser or node use

When to avoid

• you need to parse or decode arbitrary existing binary formats rather than construct them
• you want schema-based serialization like protobuf with cross-language support
• you need streaming or incremental serialization of large data

Facets

library · maturity maintenance

serialization developer-tools developer-tools files web-development browser cross-platform binary-data byte-level structs endianness uint8array bitfields nodejs typescript

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