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@conform-to/zod
Advanced tools
This tries to infer constraint of each field based on the zod schema. This is useful for:
:required
import { useForm } from '@conform-to/react';
import { getFieldsetConstraint } from '@conform-to/zod';
import { z } from 'zod';
const schema = z.object({
email: z.string({ required_error: 'Email is required' }),
password: z.string({ required_error: 'Password is required' }),
});
function Example() {
const [form, { email, password }] = useForm({
constraint: getFieldsetConstraint(schema),
});
// ...
}
It parses the formData and returns a submission result with the validation error. If no error is found, the parsed data will also be populated as submission.value
.
import { useForm } from '@conform-to/react';
import { parse } from '@conform-to/zod';
import { z } from 'zod';
const schema = z.object({
email: z.string({ required_error: 'Email is required' }),
password: z.string({ required_error: 'Password is required' }),
});
function ExampleForm() {
const [form, { email, password }] = useForm({
onValidate({ formData }) {
return parse(formData, {
schema,
stripEmptyValue: true,
});
},
});
// ...
}
Or when parsing the formData on server side (e.g. Remix):
import { useForm } from '@conform-to/react';
import { parse } from '@conform-to/zod';
import { z } from 'zod';
const schema = z.object({
// Define the schema with zod
});
export async function action({ request }) {
const formData = await request.formData();
const submission = await parse(formData, {
// If you need extra validation on server side
schema: schema.refine(/* ... */),
// Recommended: this will be the default in the future
stripEmptyValue: true,
// If the schema definition includes async validation
async: true,
});
if (!submission.value || submission.intent !== 'submit') {
return submission;
}
// ...
}
A helper function to define a custom constraint on a superRefine check. This is mainly used to setup async validation.
import { refine } from '@conform-to/zod';
function createSchema(
intent: string,
constraints: {
// The validation will only be implemented on server side
isEmailUnique?: (email) => Promise<boolean>;
} = {},
) {
return z.object({
email: z
.string({ required_error: 'Email is required' })
.email('Email is invalid')
.superRefine((email, ctx) =>
refine(ctx, {
// It fallbacks to server validation when it returns an undefined value
validate: () => constraints.isEmailUnique?.(email),
// This makes it validate only when the user is submitting the form
// or updating the email
when: intent === 'submit' || intent === 'validate/email',
message: 'Email is already used',
}),
),
// ...
});
}
FAQs
Conform helpers for integrating with Zod
The npm package @conform-to/zod receives a total of 63,138 weekly downloads. As such, @conform-to/zod popularity was classified as popular.
We found that @conform-to/zod demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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