registry/forms/tanstack-form/rules/tsf-rules-01.tsx
'use client'
import { useForm } from '@tanstack/react-form'
import { Lock } from 'lucide-react'
import { toast } from 'sonner'
import * as z from 'zod'
import { Button } from '@/components/ui/button'
import {
Card,
CardContent,
CardDescription,
CardHeader,
CardTitle,
} from '@/components/ui/card'
import {
Field,
FieldDescription,
FieldError,
FieldGroup,
FieldLabel,
} from '@/components/ui/field'
import { Input } from '@/components/ui/input'
const formSchema = z
.object({
password: z
.string()
.min(8, 'Use at least 8 characters.')
.regex(/[A-Z]/, 'Include an uppercase letter.')
.regex(/[0-9]/, 'Include a number.'),
confirm: z.string(),
})
.refine((data) => data.password === data.confirm, {
message: 'Passwords do not match.',
path: ['confirm'],
})
export function TsfRules01() {
const form = useForm({
defaultValues: { password: '', confirm: '' },
validators: { onSubmit: formSchema },
onSubmit: async () => {
toast.success('Password updated')
},
})
return (
<Card className="w-full max-w-sm">
<CardHeader>
<CardTitle className="flex items-center gap-2">
<Lock className="text-muted-foreground size-4" />
Change password
</CardTitle>
<CardDescription>
Pick a strong password and confirm it matches.
</CardDescription>
</CardHeader>
<CardContent>
<form
onSubmit={(e) => {
e.preventDefault()
form.handleSubmit()
}}
>
<FieldGroup>
<form.Field name="password">
{(field) => {
const isInvalid =
field.state.meta.isTouched && !field.state.meta.isValid
return (
<Field data-invalid={isInvalid}>
<FieldLabel htmlFor={field.name}>Password</FieldLabel>
<Input
id={field.name}
name={field.name}
type="password"
placeholder="••••••••"
aria-invalid={isInvalid}
value={field.state.value}
onBlur={field.handleBlur}
onChange={(e) => field.handleChange(e.target.value)}
/>
{isInvalid ? (
<FieldError errors={field.state.meta.errors} />
) : (
<FieldDescription>
8+ characters, one uppercase and one number.
</FieldDescription>
)}
</Field>
)
}}
</form.Field>
<form.Field name="confirm">
{(field) => {
const isInvalid =
field.state.meta.isTouched && !field.state.meta.isValid
return (
<Field data-invalid={isInvalid}>
<FieldLabel htmlFor={field.name}>
Confirm password
</FieldLabel>
<Input
id={field.name}
name={field.name}
type="password"
placeholder="••••••••"
aria-invalid={isInvalid}
value={field.state.value}
onBlur={field.handleBlur}
onChange={(e) => field.handleChange(e.target.value)}
/>
{isInvalid && (
<FieldError errors={field.state.meta.errors} />
)}
</Field>
)
}}
</form.Field>
<Button type="submit" size="sm">
Update password
</Button>
</FieldGroup>
</form>
</CardContent>
</Card>
)
}



























