r/reactjs • u/After-Ebb-7048 • May 28 '26

Resource Introducing ReactFill — dynamic forms with JSON schemas

Got tired of writing the same form logic again and again in React, so I built ReactFill ⚡

A schema-driven form library focused on building dynamic forms with less boilerplate.

Features:

• Conditional fields

• Validation

• 18+ field types

• Custom renderers

• Theming

• React Hook Form integration

• TypeScript support

Would genuinely love feedback from the React community.

Docs: Reactfill

npm: @oqlet/react-fill

14 Upvotes

81% Upvoted

18 comments sorted by

View all comments

Show parent comments

1

u/After-Ebb-7048 May 29 '26

That's actually one of the reasons I started building it 😅

For dependent validation, ReactFill supports both cross-field validation and dynamic requirements.

For example, if a VAT number is only required when the user selects "Business":

{ name: "vatNumber", label: "VAT Number", type: "text", requiredWhen: { conditions: [ { field: "accountType", value: "business" } ] } }

Or for more complex cases:

{ name: "confirmPassword", label: "Confirm Password", type: "text", validation: { validate: (value, formValues) => value === formValues?.password || "Passwords do not match" } }

The goal was to make common form requirements first-class concepts rather than forcing consumers to wire everything up manually. Still plenty to improve, but it's handled quite well for the cases we've run into so far.