ultraqs

The safest way to build Query Parameters in TypeScript — zero dependencies, works identically in Deno, Node, Bun, and the browser.

Install

Published on JSR — works everywhere from one package, no separate npm publish needed.

# Deno
deno add @ultirequiem/ultraqs

# Node / Bun / any npm-compatible tool
npx jsr add @ultirequiem/ultraqs

import { addParams } from "@ultirequiem/ultraqs";

addParams("https://ultirequiem.com", { page: 33, author: "Me", share: false });
//=> https://ultirequiem.com/?page=33&author=Me&share=false

addParams("https://api.com", {
  tags: ["tech", "ai"],
  filter: { price: { min: 10, max: 100 } },
});
//=> https://api.com/?tags=tech&tags=ai&filter.price.min=10&filter.price.max=100

API

Function	What it does
addParams(url, params, options?)	Add/merge params into a URL. options.asURL: true returns a URL instead of a string.
removeParams(url, keys)	Delete one or more keys from a URL’s query string.
mergeParams(url, params, options?)	Same as addParams, named for readability.
stringify(params, options?)	Plain object → query string, no URL involved.
parse(input, options?)	Query string/URL → object. Pass { schema } for typed output.
query(url)	Fluent builder: .set() / .append() / .delete() / .toString() / .toURL().
build(template, params, options?)	"/users/:id" + { id: 1 } → "/users/1", with an optional query.
t, validateParams(schema, params)	Tiny schema builder (t.string(), t.number().min().max(), t.boolean(), t.array()) for typed parse()/validateParams().

Options (shared across the functions above)

Option	Values	Default	Effect
array	"repeat" | "comma" | "bracket"	"repeat"	tags=a&tags=b / tags=a,b / tags[]=a&tags[]=b
nested	"dot" | "bracket"	"dot"	filter.price.min=10 / filter[price][min]=10
merge	"replace" | "append" | "preserve"	"replace"	How a new value interacts with an existing same-key value
strict	boolean	false	Throw on values with no serialization rule instead of best-effort String()
sort	boolean	false	Sort output by key for deterministic/cacheable URLs
encode	boolean	true	false skips percent-encoding (debug/display only)
signatureSafe	boolean	false	AWS SigV4-style canonical query string: sorted, strictly RFC 3986-encoded, flat scalars only

Schema-typed parsing

t.*() schemas only need a .parse(value: unknown): T method — the same shape a real Zod/Valibot schema exposes, so you can mix them in with zero dependency on either:

import { parse, t } from "@ultirequiem/ultraqs";

parse("?page=2&tags=js,ts", {
  array: "comma",
  schema: { page: t.number(), tags: t.array(t.string()) },
});
//=> { page: 2, tags: ["js", "ts"] }

Since query values arrive as strings, prefer z.coerce.number()/z.coerce.boolean() over z.number()/z.boolean() when passing in a real Zod schema.

Documentation

Full API reference is auto-generated on jsr.io/@ultirequiem/ultraqs 📄

Versioning

We use Semantic Versioning. For the versions available, see the tags 🏷️

Licence

Licensed under the MIT License 📄