Hooks

Where it lives

• hooks/use-mobile.tsGitHub ↗
  Read the script

  import * as React from 'react'
  
  const MOBILE_BREAKPOINT = 768
  
  export function useIsMobile() {
    const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined)
  
    React.useEffect(() => {
      const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
      const onChange = () => {
        setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
      }
      mql.addEventListener('change', onChange)
      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
      return () => mql.removeEventListener('change', onChange)
    }, [])
  
    return !!isMobile
  }
  

• hooks/use-toast.tsGitHub ↗
  Read the script

  'use client'
  
  // Inspired by react-hot-toast library
  import * as React from 'react'
  
  import type { ToastActionElement, ToastProps } from '@/components/ui/toast'
  
  const TOAST_LIMIT = 1
  const TOAST_REMOVE_DELAY = 1000000
  
  type ToasterToast = ToastProps & {
    id: string
    title?: React.ReactNode
    description?: React.ReactNode
    action?: ToastActionElement
  }
  
  const actionTypes = {
    ADD_TOAST: 'ADD_TOAST',
    UPDATE_TOAST: 'UPDATE_TOAST',
    DISMISS_TOAST: 'DISMISS_TOAST',
    REMOVE_TOAST: 'REMOVE_TOAST',
  } as const
  
  let count = 0
  
  function genId() {
    count = (count + 1) % Number.MAX_SAFE_INTEGER
    return count.toString()
  }
  
  type ActionType = typeof actionTypes
  
  type Action =
    | {
        type: ActionType['ADD_TOAST']
        toast: ToasterToast
      }
    | {
        type: ActionType['UPDATE_TOAST']
        toast: Partial<ToasterToast>
      }
    | {
        type: ActionType['DISMISS_TOAST']
        toastId?: ToasterToast['id']
      }
    | {
        type: ActionType['REMOVE_TOAST']
        toastId?: ToasterToast['id']
      }
  
  interface State {
    toasts: ToasterToast[]
  }
  
  const toastTimeouts = new Map<string, ReturnType<typeof setTimeout>>()
  
  const addToRemoveQueue = (toastId: string) => {
    if (toastTimeouts.has(toastId)) {
      return
    }
  
    const timeout = setTimeout(() => {
      toastTimeouts.delete(toastId)
      dispatch({
        type: 'REMOVE_TOAST',
        toastId: toastId,
      })
    }, TOAST_REMOVE_DELAY)
  
    toastTimeouts.set(toastId, timeout)
  }
  
  export const reducer = (state: State, action: Action): State => {
    switch (action.type) {
      case 'ADD_TOAST':
        return {
          ...state,
          toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT),
        }
  
      case 'UPDATE_TOAST':
        return {
          ...state,
          toasts: state.toasts.map((t) =>
            t.id === action.toast.id ? { ...t, ...action.toast } : t,
          ),
        }
  
      case 'DISMISS_TOAST': {
        const { toastId } = action
  
        // ! Side effects ! - This could be extracted into a dismissToast() action,
        // but I'll keep it here for simplicity
        if (toastId) {
          addToRemoveQueue(toastId)
        } else {
          state.toasts.forEach((toast) => {
            addToRemoveQueue(toast.id)
          })
        }
  
        return {
          ...state,
          toasts: state.toasts.map((t) =>
            t.id === toastId || toastId === undefined
              ? {
                  ...t,
                  open: false,
                }
              : t,
          ),
        }
      }
      case 'REMOVE_TOAST':
        if (action.toastId === undefined) {
          return {
            ...state,
            toasts: [],
          }
        }
        return {
          ...state,
          toasts: state.toasts.filter((t) => t.id !== action.toastId),
        }
    }
  }
  
  const listeners: Array<(state: State) => void> = []
  
  let memoryState: State = { toasts: [] }
  
  function dispatch(action: Action) {
    memoryState = reducer(memoryState, action)
    listeners.forEach((listener) => {
      listener(memoryState)
    })
  }
  
  type Toast = Omit<ToasterToast, 'id'>
  
  function toast({ ...props }: Toast) {
    const id = genId()
  
    const update = (props: ToasterToast) =>
      dispatch({
        type: 'UPDATE_TOAST',
        toast: { ...props, id },
      })
    const dismiss = () => dispatch({ type: 'DISMISS_TOAST', toastId: id })
  
    dispatch({
      type: 'ADD_TOAST',
      toast: {
        ...props,
        id,
        open: true,
        onOpenChange: (open) => {
          if (!open) dismiss()
        },
      },
    })
  
    return {
      id: id,
      dismiss,
      update,
    }
  }
  
  function useToast() {
    const [state, setState] = React.useState<State>(memoryState)
  
    React.useEffect(() => {
      listeners.push(setState)
      return () => {
        const index = listeners.indexOf(setState)
        if (index > -1) {
          listeners.splice(index, 1)
        }
      }
    }, [state])
  
    return {
      ...state,
      toast,
      dismiss: (toastId?: string) => dispatch({ type: 'DISMISS_TOAST', toastId }),
    }
  }
  
  export { useToast, toast }
  

Read the script before you install anything that runs on your machine. This is the one part of a plugin that acts without being asked.