---
title: useBreakpointEffect
description: "`useBreakpointEffect`は、ブレイクポイントが変更されたときにエフェクトを実行するカスタムフックです。"
links:
  - source: https://github.com/yamada-ui/yamada-ui/tree/main/packages/react/src/hooks/use-breakpoint
  - storybook: https://yamada-ui.github.io/yamada-ui?path=/story/hooks-usebreakpointeffect--basic
---

```tsx
const [device, setDevice] = useState("mobile");

useBreakpointEffect(breakpoint => {
  if (breakpoint === "sm") {
    setDevice("mobile");
  } else if (breakpoint === "md") {
    setDevice("tablet");
  } else {
    setDevice("desktop");
  }
}, []);

return <Text>The current device is "{device}"</Box>;
```

## 使い方

```tsx
import { useBreakpointEffect } from "@yamada-ui/react"
```

```tsx
import { useBreakpointEffect } from "@/components/ui"
```

```tsx
import { useBreakpointEffect } from "@workspaces/ui"
```

```tsx
const [device, setDevice] = useState("mobile")

useBreakpointEffect((breakpoint) => {
  if (breakpoint === "sm") {
    setDevice("mobile")
  } else if (breakpoint === "md") {
    setDevice("tablet")
  } else {
    setDevice("desktop")
  }
}, [])
```