Files
headlessui/packages/@headlessui-react/playground-utils/hooks/use-popper.ts
T
Robin Malfait ef00732685 cleanup and consistency (#213)
- Made the use of `const` and `let` consistent
- import required functions and types from 'react' instead of using the
  `React.` namespace.
- Added `Expand` type, which can expand complex types to their "final"
  result.
- Ensured that we use `as const` for DEFAULT_XXX_TAG where we used a
  string. So that we have the type of `div` instead of `string` for
  example.
- Used `interface` over `type` where possible. I'm personally more of a
  `type` fan. But the TypeScript recommends `interfaces` where possible
  because they are faster, yield better error messages and so on.
2021-01-30 14:46:54 +01:00

38 lines
1.0 KiB
TypeScript

import { RefCallback, useRef, useCallback, useMemo } from 'react'
import { createPopper, Options } from '@popperjs/core'
/**
* Example implementation to use Popper: https://popper.js.org/
*/
export function usePopper(
options?: Partial<Options>
): [RefCallback<Element | null>, RefCallback<HTMLElement | null>] {
let reference = useRef<Element>(null)
let popper = useRef<HTMLElement>(null)
let cleanupCallback = useRef(() => {})
let instantiatePopper = useCallback(() => {
if (!reference.current) return
if (!popper.current) return
if (cleanupCallback.current) cleanupCallback.current()
cleanupCallback.current = createPopper(reference.current, popper.current, options).destroy
}, [reference, popper, cleanupCallback, options])
return useMemo(
() => [
referenceDomNode => {
reference.current = referenceDomNode
instantiatePopper()
},
popperDomNode => {
popper.current = popperDomNode
instantiatePopper()
},
],
[reference, popper, instantiatePopper]
)
}