Carousel

基于 Embla 构建的可滑动轮播组件。

import * as React from "react"

import { Card, CardContent } from "@/components/ui/card"
import {
  Carousel,
  CarouselContent,
  CarouselItem,
  CarouselNext,
  CarouselPrevious,
} from "@/components/ui/carousel"

export function CarouselDemo() {
  return (
    <Carousel className="w-full max-w-xs">
      <CarouselContent>
        {Array.from({ length: 5 }).map((_, index) => (
          <CarouselItem key={index}>
            <div className="p-1">
              <Card>
                <CardContent className="flex aspect-square items-center justify-center p-6">
                  <span className="text-4xl font-semibold">{index + 1}</span>
                </CardContent>
              </Card>
            </div>
          </CarouselItem>
        ))}
      </CarouselContent>
      <CarouselPrevious />
      <CarouselNext />
    </Carousel>
  )
}

关于

轮播组件使用 Embla Carousel 库实现。

安装


pnpm dlx shadcn@latest add carousel

用法

import {
  Carousel,
  CarouselContent,
  CarouselItem,
  CarouselNext,
  CarouselPrevious,
} from "@/components/ui/carousel"

<Carousel>
  <CarouselContent>
    <CarouselItem>...</CarouselItem>
    <CarouselItem>...</CarouselItem>
    <CarouselItem>...</CarouselItem>
  </CarouselContent>
  <CarouselPrevious />
  <CarouselNext />
</Carousel>

示例

尺寸

可以在 <CarouselItem /> 上使用 basis 类来设置条目的宽度。

import * as React from "react"

import { Card, CardContent } from "@/components/ui/card"
import {
  Carousel,
  CarouselContent,
  CarouselItem,
  CarouselNext,
  CarouselPrevious,
} from "@/components/ui/carousel"

export function CarouselSize() {
  return (
    <Carousel
      opts={{
        align: "start",
      }}
      className="w-full max-w-sm"
    >
      <CarouselContent>
        {Array.from({ length: 5 }).map((_, index) => (
          <CarouselItem key={index} className="md:basis-1/2 lg:basis-1/3">
            <div className="p-1">
              <Card>
                <CardContent className="flex aspect-square items-center justify-center p-6">
                  <span className="text-3xl font-semibold">{index + 1}</span>
                </CardContent>
              </Card>
            </div>
          </CarouselItem>
        ))}
      </CarouselContent>
      <CarouselPrevious />
      <CarouselNext />
    </Carousel>
  )
}

// 占轮播宽度的 33%。
<Carousel>
  <CarouselContent>
    <CarouselItem className="basis-1/3">...</CarouselItem>
    <CarouselItem className="basis-1/3">...</CarouselItem>
    <CarouselItem className="basis-1/3">...</CarouselItem>
  </CarouselContent>
</Carousel>

// 小屏占 50%，大屏占 33%。
<Carousel>
  <CarouselContent>
    <CarouselItem className="md:basis-1/2 lg:basis-1/3">...</CarouselItem>
    <CarouselItem className="md:basis-1/2 lg:basis-1/3">...</CarouselItem>
    <CarouselItem className="md:basis-1/2 lg:basis-1/3">...</CarouselItem>
  </CarouselContent>
</Carousel>

间距

通过在 <CarouselItem /> 上设置 pl-[VALUE]，并在 <CarouselContent /> 上设置负的 -ml-[VALUE] 来控制条目间距。

原因： 虽然可以在 <CarouselContent /> 上使用 gap 或 grid 布局，但需要大量计算才能获得合适的间距。相比之下，使用 pl-[VALUE] 与 -ml-[VALUE] 更直观。

如有需要，可在自己的项目中自由调整。

import * as React from "react"

import { Card, CardContent } from "@/components/ui/card"
import {
  Carousel,
  CarouselContent,
  CarouselItem,
  CarouselNext,
  CarouselPrevious,
} from "@/components/ui/carousel"

export function CarouselSpacing() {
  return (
    <Carousel className="w-full max-w-sm">
      <CarouselContent className="-ml-1">
        {Array.from({ length: 5 }).map((_, index) => (
          <CarouselItem key={index} className="pl-1 md:basis-1/2 lg:basis-1/3">
            <div className="p-1">
              <Card>
                <CardContent className="flex aspect-square items-center justify-center p-6">
                  <span className="text-2xl font-semibold">{index + 1}</span>
                </CardContent>
              </Card>
            </div>
          </CarouselItem>
        ))}
      </CarouselContent>
      <CarouselPrevious />
      <CarouselNext />
    </Carousel>
  )
}

<Carousel>
  <CarouselContent className="-ml-4">
    <CarouselItem className="pl-4">...</CarouselItem>
    <CarouselItem className="pl-4">...</CarouselItem>
    <CarouselItem className="pl-4">...</CarouselItem>
  </CarouselContent>
</Carousel>

<Carousel>
  <CarouselContent className="-ml-2 md:-ml-4">
    <CarouselItem className="pl-2 md:pl-4">...</CarouselItem>
    <CarouselItem className="pl-2 md:pl-4">...</CarouselItem>
    <CarouselItem className="pl-2 md:pl-4">...</CarouselItem>
  </CarouselContent>
</Carousel>

方向

使用 orientation 属性来设置轮播方向。

import * as React from "react"

import { Card, CardContent } from "@/components/ui/card"
import {
  Carousel,
  CarouselContent,
  CarouselItem,
  CarouselNext,
  CarouselPrevious,
} from "@/components/ui/carousel"

export function CarouselOrientation() {
  return (
    <Carousel
      opts={{
        align: "start",
      }}
      orientation="vertical"
      className="w-full max-w-xs"
    >
      <CarouselContent className="-mt-1 h-[200px]">
        {Array.from({ length: 5 }).map((_, index) => (
          <CarouselItem key={index} className="pt-1 md:basis-1/2">
            <div className="p-1">
              <Card>
                <CardContent className="flex items-center justify-center p-6">
                  <span className="text-3xl font-semibold">{index + 1}</span>
                </CardContent>
              </Card>
            </div>
          </CarouselItem>
        ))}
      </CarouselContent>
      <CarouselPrevious />
      <CarouselNext />
    </Carousel>
  )
}

<Carousel orientation="vertical | horizontal">
  <CarouselContent>
    <CarouselItem>...</CarouselItem>
    <CarouselItem>...</CarouselItem>
    <CarouselItem>...</CarouselItem>
  </CarouselContent>
</Carousel>

Options

通过 opts 属性向轮播传入配置项。更多说明见 Embla Carousel 文档。

<Carousel
  opts={{
    align: "start",
    loop: true,
  }}
>
  <CarouselContent>
    <CarouselItem>...</CarouselItem>
    <CarouselItem>...</CarouselItem>
    <CarouselItem>...</CarouselItem>
  </CarouselContent>
</Carousel>

API

使用状态与 setApi 属性获取轮播 API 实例。

Slide 0 of 0

"use client"

import * as React from "react"

import { Card, CardContent } from "@/components/ui/card"
import {
  Carousel,
  CarouselContent,
  CarouselItem,
  CarouselNext,
  CarouselPrevious,
  type CarouselApi,
} from "@/components/ui/carousel"

export function CarouselDApiDemo() {
  const [api, setApi] = React.useState<CarouselApi>()
  const [current, setCurrent] = React.useState(0)
  const [count, setCount] = React.useState(0)

  React.useEffect(() => {
    if (!api) {
      return
    }

    setCount(api.scrollSnapList().length)
    setCurrent(api.selectedScrollSnap() + 1)

    api.on("select", () => {
      setCurrent(api.selectedScrollSnap() + 1)
    })
  }, [api])

  return (
    <div className="mx-auto max-w-xs">
      <Carousel setApi={setApi} className="w-full max-w-xs">
        <CarouselContent>
          {Array.from({ length: 5 }).map((_, index) => (
            <CarouselItem key={index}>
              <Card>
                <CardContent className="flex aspect-square items-center justify-center p-6">
                  <span className="text-4xl font-semibold">{index + 1}</span>
                </CardContent>
              </Card>
            </CarouselItem>
          ))}
        </CarouselContent>
        <CarouselPrevious />
        <CarouselNext />
      </Carousel>
      <div className="text-muted-foreground py-2 text-center text-sm">
        Slide {current} of {count}
      </div>
    </div>
  )
}

import { type CarouselApi } from "@/components/ui/carousel"
 
export function Example() {
  const [api, setApi] = React.useState<CarouselApi>()
  const [current, setCurrent] = React.useState(0)
  const [count, setCount] = React.useState(0)
 
  React.useEffect(() => {
    if (!api) {
      return
    }
 
    setCount(api.scrollSnapList().length)
    setCurrent(api.selectedScrollSnap() + 1)
 
    api.on("select", () => {
      setCurrent(api.selectedScrollSnap() + 1)
    })
  }, [api])
 
  return (
    <Carousel setApi={setApi}>
      <CarouselContent>
        <CarouselItem>...</CarouselItem>
        <CarouselItem>...</CarouselItem>
        <CarouselItem>...</CarouselItem>
      </CarouselContent>
    </Carousel>
  )
}

事件

可以借助 setApi 返回的实例监听事件。

import { type CarouselApi } from "@/components/ui/carousel"
 
export function Example() {
  const [api, setApi] = React.useState<CarouselApi>()
 
  React.useEffect(() => {
    if (!api) {
      return
    }
 
    api.on("select", () => {
      // Do something on select.
    })
  }, [api])
 
  return (
    <Carousel setApi={setApi}>
      <CarouselContent>
        <CarouselItem>...</CarouselItem>
        <CarouselItem>...</CarouselItem>
        <CarouselItem>...</CarouselItem>
      </CarouselContent>
    </Carousel>
  )
}

有关事件的更多信息，请查看 Embla Carousel 文档。

插件

可以通过 plugins 属性为轮播添加插件。

import Autoplay from "embla-carousel-autoplay"
 
export function Example() {
  return (
    <Carousel
      plugins={[
        Autoplay({
          delay: 2000,
        }),
      ]}
    >
      // ...
    </Carousel>
  )
}

"use client"

import * as React from "react"
import Autoplay from "embla-carousel-autoplay"

import { Card, CardContent } from "@/components/ui/card"
import {
  Carousel,
  CarouselContent,
  CarouselItem,
  CarouselNext,
  CarouselPrevious,
} from "@/components/ui/carousel"

export function CarouselPlugin() {
  const plugin = React.useRef(
    Autoplay({ delay: 2000, stopOnInteraction: true })
  )

  return (
    <Carousel
      plugins={[plugin.current]}
      className="w-full max-w-xs"
      onMouseEnter={plugin.current.stop}
      onMouseLeave={plugin.current.reset}
    >
      <CarouselContent>
        {Array.from({ length: 5 }).map((_, index) => (
          <CarouselItem key={index}>
            <div className="p-1">
              <Card>
                <CardContent className="flex aspect-square items-center justify-center p-6">
                  <span className="text-4xl font-semibold">{index + 1}</span>
                </CardContent>
              </Card>
            </div>
          </CarouselItem>
        ))}
      </CarouselContent>
      <CarouselPrevious />
      <CarouselNext />
    </Carousel>
  )
}

关于插件的更多用法，请参阅 Embla Carousel 文档。

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