Form
用法
使用 Form 组件可以通过以下验证库验证表单数据,例如:Valibot, Zod, Yup, Joi, Superstruct或者使用您自己的验证逻辑。
它与 FormField 组件配合使用,可自动在表单元素周围显示错误消息。
Schema 验证
它需要两个 prop:
state
- 一个包含表单状态的响应式对象。schema
- 任意标准 Schema或来自以下库的 Schema:Yup, Joi或Superstruct.
<script setup lang="ts">
import * as v from 'valibot'
import type { FormSubmitEvent } from '@nuxt/ui'
const schema = v.object({
email: v.pipe(v.string(), v.email('Invalid email')),
password: v.pipe(v.string(), v.minLength(8, 'Must be at least 8 characters'))
})
type Schema = v.InferOutput<typeof schema>
const state = reactive({
email: '',
password: ''
})
const toast = useToast()
async function onSubmit(event: FormSubmitEvent<Schema>) {
toast.add({ title: 'Success', description: 'The form has been submitted.', color: 'success' })
console.log(event.data)
}
</script>
<template>
<UForm :schema="schema" :state="state" class="space-y-4" @submit="onSubmit">
<UFormField label="Email" name="email">
<UInput v-model="state.email" />
</UFormField>
<UFormField label="Password" name="password">
<UInput v-model="state.password" type="password" />
</UFormField>
<UButton type="submit">
Submit
</UButton>
</UForm>
</template>
<script setup lang="ts">
import * as z from 'zod'
import type { FormSubmitEvent } from '@nuxt/ui'
const schema = z.object({
email: z.string().email('Invalid email'),
password: z.string().min(8, 'Must be at least 8 characters')
})
type Schema = z.output<typeof schema>
const state = reactive<Partial<Schema>>({
email: undefined,
password: undefined
})
const toast = useToast()
async function onSubmit(event: FormSubmitEvent<Schema>) {
toast.add({ title: 'Success', description: 'The form has been submitted.', color: 'success' })
console.log(event.data)
}
</script>
<template>
<UForm :schema="schema" :state="state" class="space-y-4" @submit="onSubmit">
<UFormField label="Email" name="email">
<UInput v-model="state.email" />
</UFormField>
<UFormField label="Password" name="password">
<UInput v-model="state.password" type="password" />
</UFormField>
<UButton type="submit">
Submit
</UButton>
</UForm>
</template>
<script setup lang="ts">
import { object, string } from 'yup'
import type { InferType } from 'yup'
import type { FormSubmitEvent } from '@nuxt/ui'
const schema = object({
email: string().email('Invalid email').required('Required'),
password: string()
.min(8, 'Must be at least 8 characters')
.required('Required')
})
type Schema = InferType<typeof schema>
const state = reactive({
email: undefined,
password: undefined
})
const toast = useToast()
async function onSubmit(event: FormSubmitEvent<Schema>) {
toast.add({ title: 'Success', description: 'The form has been submitted.', color: 'success' })
console.log(event.data)
}
</script>
<template>
<UForm :schema="schema" :state="state" class="space-y-4" @submit="onSubmit">
<UFormField label="Email" name="email">
<UInput v-model="state.email" />
</UFormField>
<UFormField label="Password" name="password">
<UInput v-model="state.password" type="password" />
</UFormField>
<UButton type="submit">
Submit
</UButton>
</UForm>
</template>
<script setup lang="ts">
import Joi from 'joi'
import type { FormSubmitEvent } from '@nuxt/ui'
const schema = Joi.object({
email: Joi.string().required(),
password: Joi.string()
.min(8)
.required()
})
const state = reactive({
email: undefined,
password: undefined
})
const toast = useToast()
async function onSubmit(event: FormSubmitEvent<typeof state>) {
toast.add({ title: 'Success', description: 'The form has been submitted.', color: 'success' })
console.log(event.data)
}
</script>
<template>
<UForm :schema="schema" :state="state" class="space-y-4" @submit="onSubmit">
<UFormField label="Email" name="email">
<UInput v-model="state.email" />
</UFormField>
<UFormField label="Password" name="password">
<UInput v-model="state.password" type="password" />
</UFormField>
<UButton type="submit">
Submit
</UButton>
</UForm>
</template>
<script setup lang="ts">
import { object, string, nonempty, refine } from 'superstruct'
import type { Infer } from 'superstruct'
import type { FormSubmitEvent } from '@nuxt/ui'
const schema = object({
email: nonempty(string()),
password: refine(string(), 'Password', (value) => {
if (value.length >= 8) return true
return 'Must be at least 8 characters'
})
})
const state = reactive({
email: '',
password: ''
})
type Schema = Infer<typeof schema>
async function onSubmit(event: FormSubmitEvent<Schema>) {
console.log(event.data)
}
</script>
<template>
<UForm :schema="schema" :state="state" class="space-y-4" @submit="onSubmit">
<UFormField label="Email" name="email">
<UInput v-model="state.email" />
</UFormField>
<UFormField label="Password" name="password">
<UInput v-model="state.password" type="password" />
</UFormField>
<UButton type="submit">
Submit
</UButton>
</UForm>
</template>
错误会根据 name
或 error-pattern
prop 直接报告给 FormField 组件。这意味着您在 schema 中为 email
属性定义的验证规则将应用于 <FormField name="email">
。
嵌套验证规则使用点符号处理。例如,像 { user: z.object({ email: z.string() }) }
这样的规则将应用于 <FormField name="user.email">
。
自定义验证
使用 validate
prop 应用您自己的验证逻辑。
验证函数必须返回一个包含以下属性的错误列表:
message
- 要显示的错误消息。name
- 接收错误的FormField
的name
。
schema
prop 一起使用,以处理复杂的用例。<script setup lang="ts">
import type { FormError, FormSubmitEvent } from '@nuxt/ui'
const state = reactive({
email: undefined,
password: undefined
})
const validate = (state: any): FormError[] => {
const errors = []
if (!state.email) errors.push({ name: 'email', message: 'Required' })
if (!state.password) errors.push({ name: 'password', message: 'Required' })
return errors
}
const toast = useToast()
async function onSubmit(event: FormSubmitEvent<typeof state>) {
toast.add({ title: 'Success', description: 'The form has been submitted.', color: 'success' })
console.log(event.data)
}
</script>
<template>
<UForm :validate="validate" :state="state" class="space-y-4" @submit="onSubmit">
<UFormField label="Email" name="email">
<UInput v-model="state.email" />
</UFormField>
<UFormField label="Password" name="password">
<UInput v-model="state.password" type="password" />
</UFormField>
<UButton type="submit">
Submit
</UButton>
</UForm>
</template>
输入事件
当输入发出 input
、change
或 blur
事件时,Form 组件会自动触发验证。
- 在
input
事件上,验证会**在您键入时**发生。 - 在
change
事件上,验证会在您**提交值时**发生。 - 在
blur
事件上,验证会在输入**失去焦点时**发生。
您可以使用 validate-on
prop 来控制验证发生的时机。
useFormField
组合式函数在您自己的组件中实现此功能。错误事件
您可以监听 @error
事件来处理错误。此事件在表单提交时触发,并包含一个 FormError
对象数组,其中包含以下字段:
id
- 输入的id
。name
-FormField
的name
message
- 要显示的错误消息。
以下是一个示例,演示了在表单提交后如何聚焦第一个包含错误的输入元素:
<script setup lang="ts">
import type { FormError, FormErrorEvent, FormSubmitEvent } from '@nuxt/ui'
const state = reactive({
email: undefined,
password: undefined
})
const validate = (state: any): FormError[] => {
const errors = []
if (!state.email) errors.push({ name: 'email', message: 'Required' })
if (!state.password) errors.push({ name: 'password', message: 'Required' })
return errors
}
const toast = useToast()
async function onSubmit(event: FormSubmitEvent<typeof state>) {
toast.add({ title: 'Success', description: 'The form has been submitted.', color: 'success' })
console.log(event.data)
}
async function onError(event: FormErrorEvent) {
if (event?.errors?.[0]?.id) {
const element = document.getElementById(event.errors[0].id)
element?.focus()
element?.scrollIntoView({ behavior: 'smooth', block: 'center' })
}
}
</script>
<template>
<UForm :validate="validate" :state="state" class="space-y-4" @submit="onSubmit" @error="onError">
<UFormField label="Email" name="email">
<UInput v-model="state.email" />
</UFormField>
<UFormField label="Password" name="password">
<UInput v-model="state.password" type="password" />
</UFormField>
<UButton type="submit">
Submit
</UButton>
</UForm>
</template>
嵌套表单
嵌套表单组件使您能够更有效地管理复杂的数据结构,例如列表或条件字段。
例如,它可以用于根据用户的输入动态添加字段
<script setup lang="ts">
import * as z from 'zod'
import type { FormSubmitEvent } from '@nuxt/ui'
const schema = z.object({
name: z.string().min(2),
news: z.boolean().default(false)
})
type Schema = z.output<typeof schema>
const nestedSchema = z.object({
email: z.string().email()
})
type NestedSchema = z.output<typeof nestedSchema>
const state = reactive<Partial<Schema & NestedSchema>>({ })
const toast = useToast()
async function onSubmit(event: FormSubmitEvent<Schema>) {
toast.add({ title: 'Success', description: 'The form has been submitted.', color: 'success' })
console.log(event.data)
}
</script>
<template>
<UForm
:state="state"
:schema="schema"
class="gap-4 flex flex-col w-60"
@submit="onSubmit"
>
<UFormField label="Name" name="name">
<UInput v-model="state.name" placeholder="John Lennon" />
</UFormField>
<div>
<UCheckbox v-model="state.news" name="news" label="Register to our newsletter" @update:model-value="state.email = undefined" />
</div>
<UForm v-if="state.news" :state="state" :schema="nestedSchema" attach>
<UFormField label="Email" name="email">
<UInput v-model="state.email" placeholder="[email protected]" />
</UFormField>
</UForm>
<div>
<UButton type="submit">
Submit
</UButton>
</div>
</UForm>
</template>
或验证列表输入
<script setup lang="ts">
import * as z from 'zod'
import type { FormSubmitEvent } from '@nuxt/ui'
const schema = z.object({
customer: z.string().min(2)
})
type Schema = z.output<typeof schema>
const itemSchema = z.object({
description: z.string().min(1),
price: z.number().min(0)
})
type ItemSchema = z.output<typeof itemSchema>
const state = reactive<Partial<Schema & { items: Partial<ItemSchema>[] }>>({
items: [{}]
})
function addItem() {
if (!state.items) {
state.items = []
}
state.items.push({})
}
function removeItem() {
if (state.items) {
state.items.pop()
}
}
const toast = useToast()
async function onSubmit(event: FormSubmitEvent<Schema>) {
toast.add({ title: 'Success', description: 'The form has been submitted.', color: 'success' })
console.log(event.data)
}
</script>
<template>
<UForm
:state="state"
:schema="schema"
class="gap-4 flex flex-col w-60"
@submit="onSubmit"
>
<UFormField label="Customer" name="customer">
<UInput v-model="state.customer" placeholder="Wonka Industries" />
</UFormField>
<UForm
v-for="item, count in state.items"
:key="count"
:state="item"
:schema="itemSchema"
attach
class="flex gap-2"
>
<UFormField :label="!count ? 'Description' : undefined" name="description">
<UInput v-model="item.description" />
</UFormField>
<UFormField :label="!count ? 'Price' : undefined" name="price" class="w-20">
<UInput v-model="item.price" type="number" />
</UFormField>
</UForm>
<div class="flex gap-2">
<UButton color="neutral" variant="subtle" size="sm" @click="addItem()">
Add Item
</UButton>
<UButton color="neutral" variant="ghost" size="sm" @click="removeItem()">
Remove Item
</UButton>
</div>
<div>
<UButton type="submit">
Submit
</UButton>
</div>
</UForm>
</template>
API
属性
属性 | 默认值 | 类型 |
---|---|---|
state |
一个表示表单当前状态的对象。 | |
id |
| |
schema |
用于验证表单状态的 Schema。支持标准 Schema 对象、Yup、Joi 和 Superstructs。 | |
validate |
自定义验证函数,用于验证表单状态。 | |
validateOn |
|
触发表单验证的输入事件列表。 |
disabled |
禁用表单内的所有输入。 | |
validateOnInputDelay |
|
在输入事件上验证表单前的延迟(毫秒)。 |
transform |
|
如果为 true,schema 转换将在提交时应用于状态。 |
attach |
|
如果为 true,此表单将附着到其父表单(如果有)并同时进行验证。 |
loadingAuto |
|
当 |
插槽
插槽 | 类型 |
---|---|
default |
|
事件
事件 | 类型 |
---|---|
error |
|
submit |
|
可访问属性
您可以使用useTemplateRef
.
<script setup lang="ts">
const form = useTemplateRef('form')
</script>
<template>
<UForm ref="form" />
</template>
这将使您能够访问以下内容
名称 | 类型 |
---|---|
submit() | Promise<void> 触发表单提交。 |
validate(opts: { name?: keyof T | (keyof T)[], silent?: boolean, nested?: boolean, transform?: boolean }) | Promise<T> 触发表单验证。除非 |
clear(path?: keyof T) | void 清除与特定路径关联的表单错误。如果未提供路径,则清除所有表单错误。 |
getErrors(path?: keyof T) | FormError[] 检索与特定路径关联的表单错误。如果未提供路径,则返回所有表单错误。 |
setErrors(errors: FormError[], name?: keyof T) | void 为给定路径设置表单错误。如果未提供路径,则覆盖所有错误。 |
errors | Ref<FormError[]> 对包含验证错误的数组的引用。使用此引用可访问或操作错误信息。 |
disabled | Ref<boolean> |
dirty | Ref<boolean> 如果至少有一个表单字段已由用户更新,则为 true 。 |
dirtyFields | DeepReadonly<Set<keyof T>> 跟踪已被用户修改的字段。 |
touchedFields | DeepReadonly<Set<keyof T>> 跟踪用户与之交互过的字段。 |
blurredFields | DeepReadonly<Set<keyof T>> 跟踪用户模糊(失焦)过的字段。 |
主题
export default defineAppConfig({
ui: {
form: {
base: ''
}
}
})
import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import ui from '@nuxt/ui/vite'
export default defineConfig({
plugins: [
vue(),
ui({
ui: {
form: {
base: ''
}
}
})
]
})
import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import uiPro from '@nuxt/ui-pro/vite'
export default defineConfig({
plugins: [
vue(),
uiPro({
ui: {
form: {
base: ''
}
}
})
]
})