Theme

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A headless component to theme child components.

Usage

The Theme component allows you to override default slot classes and props of all child components without modifying each one individually. It uses Vue's provide / inject mechanism under the hood, so the overrides apply at any depth.

The Theme component doesn't render any HTML element, it only provides theme overrides to its children.
For app-level theme configuration, we recommend using the app.config.ts file instead.
For app-level theme configuration, we recommend using the vite.config.ts file instead.

Slot classes

Use the ui prop to override slot classes of descendant components. Keys are component names (camelCase) and values are their slot class overrides.

<template>
  <UTheme
    :ui="{
      button: {
        base: 'rounded-full'
      }
    }"
  >
    <div class="flex items-center gap-2">
      <UButton label="Button" color="neutral" />
      <UButton label="Button" color="neutral" variant="outline" />
      <UButton label="Button" color="neutral" variant="subtle" />
    </div>
  </UTheme>
</template>

Prop defaults 4.8+

Use the props prop to override the default value of any prop on descendant components. Each key maps to a partial of that component's props.

<template>
  <UTheme
    :props="{
      button: { color: 'neutral', variant: 'subtle', size: 'lg' },
      tooltip: { delayDuration: 0, arrow: true }
    }"
  >
    <div class="flex items-center gap-2">
      <UTooltip text="Inherits delayDuration from theme">
        <UButton label="Hover me" />
      </UTooltip>
      <UButton label="With icon" icon="i-lucide-rocket" />
      <UButton label="Square" icon="i-lucide-star" square />
    </div>
  </UTheme>
</template>
Explicit props on a component (e.g. <UButton color="primary" />) always win over <UTheme :props>. Theme defaults only apply when the prop wasn't passed explicitly.

Examples

Multiple components

Use different keys in ui or props to theme multiple component types at once.

<template>
  <UTheme
    :props="{
      button: { color: 'neutral', variant: 'outline', size: 'lg' },
      input: { size: 'lg' },
      select: { size: 'lg' }
    }"
    :ui="{
      button: { base: 'rounded-full' },
      input: { base: 'rounded-full' },
      select: { base: 'rounded-full' }
    }"
  >
    <div class="flex items-center gap-2">
      <UButton label="Button" />
      <UInput placeholder="Search..." />
      <USelect placeholder="Select" :items="['Item 1', 'Item 2', 'Item 3']" />
    </div>
  </UTheme>
</template>

Nested themes

Nest multiple Theme components to compose overrides. The innermost Theme takes precedence, while unoverridden keys are inherited from the outer Theme.

<template>
  <UTheme
    :ui="{
      button: {
        base: 'rounded-full'
      }
    }"
  >
    <div class="flex flex-col items-start gap-4 border border-muted p-4 rounded-lg">
      <div class="flex items-center gap-2">
        <UButton label="Outer theme" />
        <UButton label="Outer theme" color="neutral" variant="outline" />
      </div>

      <UTheme
        :ui="{
          button: {
            base: 'font-black uppercase'
          }
        }"
      >
        <div class="border border-muted p-4 rounded-lg">
          <div class="flex items-center gap-2">
            <UButton label="Inner theme" />
            <UButton label="Inner theme" color="neutral" variant="outline" />
          </div>
        </div>
      </UTheme>
    </div>
  </UTheme>
</template>

Explicit priority

Explicitly setting any prop (including ui) on an individual component always takes priority over the Theme component.

<template>
  <UTheme
    :ui="{
      button: {
        base: 'rounded-full'
      }
    }"
  >
    <div class="flex items-center gap-2">
      <UButton label="Themed" />
      <UButton label="Overridden" :ui="{ base: 'rounded-none' }" />
    </div>
  </UTheme>
</template>

Deep propagation

The overrides are available to all descendant components regardless of how deeply nested they are.

<script setup lang="ts">
import MyButton from './MyButton.vue'
</script>

<template>
  <UTheme
    :ui="{
      button: {
        base: 'rounded-full'
      }
    }"
  >
    <UCard :ui="{ body: 'flex items-center gap-2 sm:flex-row flex-col' }">
      <UButton label="Direct child" />
      <MyButton />
    </UCard>
  </UTheme>
</template>
In this example, MyButton is a custom component that renders a UButton internally. The theme overrides still apply because they propagate through the entire component tree.

Form components

Use the Theme component to apply consistent styling across a group of form components.

Your public display name.

Used for notifications.

A short description about yourself.

<script setup lang="ts">
import * as z from 'zod'
import type { FormSubmitEvent } from '@nuxt/ui'

const schema = z.object({
  name: z.string().min(2, 'Too short'),
  email: z.email('Invalid email'),
  bio: z.string().optional()
})

type Schema = z.output<typeof schema>

const state = reactive<Partial<Schema>>({
  name: 'John Doe',
  email: 'john@example.com',
  bio: undefined
})

const toast = useToast()
async function onSubmit(event: FormSubmitEvent<Schema>) {
  toast.add({ title: 'Saved', description: 'Your profile has been updated.', color: 'success' })
  console.log(event.data)
}
</script>

<template>
  <UTheme
    :props="{
      input: { size: 'lg' },
      textarea: { size: 'lg' }
    }"
    :ui="{
      formField: {
        root: 'flex max-sm:flex-col justify-between gap-4',
        wrapper: 'w-full sm:max-w-xs'
      }
    }"
  >
    <UForm :schema="schema" :state="state" class="space-y-4 w-full" @submit="onSubmit">
      <UFormField label="Name" name="name" description="Your public display name.">
        <UInput v-model="state.name" />
      </UFormField>

      <UFormField label="Email" name="email" description="Used for notifications.">
        <UInput v-model="state.email" type="email" />
      </UFormField>

      <UFormField label="Bio" name="bio" description="A short description about yourself.">
        <UTextarea v-model="state.bio" placeholder="Tell us about yourself" />
      </UFormField>

      <div class="flex justify-end">
        <UButton type="submit">
          Save changes
        </UButton>
      </div>
    </UForm>
  </UTheme>
</template>

<script setup lang="ts">
import { reactive } from 'vue'
import * as z from 'zod'
import type { FormSubmitEvent } from '@nuxt/ui'

const schema = z.object({
  name: z.string().min(2, 'Too short'),
  email: z.email('Invalid email'),
  bio: z.string().optional()
})

type Schema = z.output<typeof schema>

const state = reactive<Partial<Schema>>({
  name: 'John Doe',
  email: 'john@example.com',
  bio: undefined
})

const toast = useToast()
async function onSubmit(event: FormSubmitEvent<Schema>) {
  toast.add({ title: 'Saved', description: 'Your profile has been updated.', color: 'success' })
  console.log(event.data)
}
</script>

<template>
  <UTheme
    :props="{
      input: { size: 'lg' },
      textarea: { size: 'lg' }
    }"
    :ui="{
      formField: {
        root: 'flex max-sm:flex-col justify-between gap-4',
        wrapper: 'w-full sm:max-w-xs'
      }
    }"
  >
    <UForm :schema="schema" :state="state" class="space-y-4 w-full" @submit="onSubmit">
      <UFormField label="Name" name="name" description="Your public display name.">
        <UInput v-model="state.name" />
      </UFormField>

      <UFormField label="Email" name="email" description="Used for notifications.">
        <UInput v-model="state.email" type="email" />
      </UFormField>

      <UFormField label="Bio" name="bio" description="A short description about yourself.">
        <UTextarea v-model="state.bio" placeholder="Tell us about yourself" />
      </UFormField>

      <div class="flex justify-end">
        <UButton type="submit">
          Save changes
        </UButton>
      </div>
    </UForm>
  </UTheme>
</template>
<UFormField>, <UFieldGroup> and <UAvatarGroup> keep precedence over <UTheme :props> for size, color and highlight. Validation errors also force the error color over any theme value.

Prose components

Use the prose namespace to theme typography components. Keys are nested under prose (e.g. prose.p, prose.code).

Getting started

This is a paragraph with a tighter typographic scale applied through the Theme component.

  • First item
  • Second item
  • Third item

The spacing and font sizes are smaller than the defaults, making it ideal for compact content areas.

<script setup lang="ts">
const ui = {
  prose: {
    p: { base: 'my-2.5 text-sm/6' },
    li: { base: 'my-0.5 text-sm/6' },
    ul: { base: 'my-2.5' },
    ol: { base: 'my-2.5' },
    h1: { base: 'text-xl mb-4' },
    h2: { base: 'text-lg mt-6 mb-3' },
    h3: { base: 'text-base mt-4 mb-2' },
    h4: { base: 'text-sm mt-3 mb-1.5' },
    code: { base: 'text-xs' },
    pre: { root: 'my-2.5', base: 'text-xs/5' },
    table: { root: 'my-2.5' },
    hr: { base: 'my-5' }
  }
}

const value = `## Getting started

This is a paragraph with a **tighter typographic scale** applied through the \`Theme\` component.

- First item
- Second item
- Third item

> The spacing and font sizes are smaller than the defaults, making it ideal for compact content areas.`
</script>

<template>
  <UTheme :ui="ui">
    <MDC :value="value" />
  </UTheme>
</template>

API

Props

Prop Default Type
props ThemeDefaults

Per-component prop defaults that flow through useComponentProps to every descendant. Each key maps to a partial of that component's props.

ui ThemeUI

Per-component slot class overrides (flat shorthand for :props.<name>.ui).

Slots

Slot Type
default{}

Changelog

No recent changes

Sidebar

A collapsible sidebar with multiple visual variants.

Alert

A callout to draw user's attention.