Supported versions

Below you will find the versions of the peers and the platforms each package supports. CI tests the lowest version of each, and the latest every day, so the ranges are measured, not guessed.

Peers

Package	Peers
Schema	valibot 1.3.0+, and @valibot/to-json-schema 1.6.0+ for the /json-schema entry only
Affects	valibot 1.3.0+, the schema package 1.x
Vue	vue 3.5.2+, @formisch/vue 1.1.1+, valibot 1.4.1+, the schema package 1.x
React	react 18.0.0+ or 19, @formisch/react 1.2.0+, valibot 1.4.1+, the schema package 1.x

• @valibot/to-json-schema is optional. Its 1.8 and later need Valibot 1.5 or later.
• Every Formisch package needs Valibot 1.4.1 or later, so with Formisch, that is the lowest Valibot. The schema package alone, for example on a server, works with 1.3.0.
• Each range ends below the peer's next major. A new major of a peer is supported in a release of ours, once it is tested.
• Vue 3.5.2 is the first whose types the Vue adapter's published types check with, when skipLibCheck is off.

The Vue and React adapters read some parts of Formisch outside its public API. See the adapters and Formisch.

Formisch bindings

With no adapter, the schema package works with Formisch's own package for each framework. The tested renderers run in CI with these, and with the latest of each every day:

Binding	Tested from
@formisch/preact	1.3.0
@formisch/solid	1.3.0
@formisch/svelte	1.2.0
@formisch/qwik	1.3.0
@formisch/angular	1.2.0

TypeScript

TypeScript 5.3 or later, with strict on. Older versions reject the keys of extensions, like affects, in a definition written with defineForm(). CI checks the published types with TypeScript 5.3 and the latest, with strict on, skipLibCheck off and moduleResolution set to nodenext.

Node

Node 20.19 or later, to import the packages, to parse on a server and to render there.

• The packages are ES modules only. Node 20.19 and later can also require() them from CommonJS, without a flag.
• CI runs the schema and affects tests on Node 22 and 24, and a project that installs the packed packages on Node 20.19 and 24, with an import, a server render with each adapter, and a require().
• Both adapters render on the server, with react-dom/server and vue/server-renderer. See validating on the server.

Browsers

The packages use ES2022, like Object.hasOwn and Array.prototype.at, and aren't compiled down: Chrome 93, Firefox 92 and Safari 15.4 or later. To support older browsers, have your bundler compile them, and add the polyfills.

Changes

A peer's new major, a new TypeScript or a new Node is supported in a minor or a patch. Dropping a peer version or a TypeScript version is a major change. A Node release line can be dropped in a minor once it reaches its end of life. See stability.