Notation.js

Read, modify, and filter the contents of JavaScript objects and arrays — with object/bracket notation strings or glob patterns.

Notation.create({ x: 1 }).set('some.prop', true).filter(['*.prop']).value;
// » { some: { prop: true } }

Get and set deeply-nested values by notation — no && guard chains, no undefined surprises.

Include or exclude fields with wildcard * and bang ! patterns. Order-independent, auto-normalized.

Round-trip between nested objects and flat, dotted-key maps — handy for DB rows and form data.

Copy, move, rename, extract, and merge properties within or across objects.

Address array indices and non-standard keys: x[0], x[“my-key”], x[’*’].

Pure ESM, ships TypeScript types, 100% test coverage. Runs on Node, Bun, Deno, and the browser.

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Builds a nested, typed configuration object from flat config items, with templating and ABAC filtering. Built on Notation.

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Role- and attribute-based access control (RBAC/ABAC) for Node.js.

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