npm install use-constant
# OR
yarn add use-constant

import useConstant from 'use-constant';

const MyComponent = () => {
  // Give useConstant() a function which should be be executed exactly once and
  // return in it your constant value
  const myConstantValue = useConstant(() => 42);
  // ...

Contributors

Stargazers

Forkers

dantsk amannn highestop liaoyinglong apiep dennissmolek souporserious

export default function useConstant<T>(fn: () => T): T {
  const ref = React.useRef<T>()

  if (!ref.current) {
    ref.current = fn()
  }

  return ref.current
}

import * as React from 'react'

export default function useConstant<T>(fn: () => T): T {
  return React.useState<T>(fn)[0]
}