readme.md

🔔 with-callback-on-change

Part of a collection of Higher-Order Components for React, especially useful with Recompose.

Invokes a callback on prop change, useful to decouple side effects like onChange handler in a declarative way.

Install

yarn add @hocs/with-callback-on-change

Usage

withCallbackOnChange(
  propName: string,
  callback: (props: Object) => void
): HigherOrderComponent

import React from 'react';
import { compose, withState, withHandlers } from 'recompose';
import withCallbackOnChange from '@hocs/with-callback-on-change';

const Demo = ({ count, onButtonClick }) => (
  <div>
    <h1>{count}</h1>
    <button onClick={onButtonClick}>increment</button>
  </div>
);

export default compose(
  withState('count', 'setCount', 0),
  withHandlers({
    onButtonClick: ({ setCount, count }) => () => setCount(count + 1)
  }),
  withCallbackOnChange('count', ({ count }) => console.log(count))
)(Demo);

📺 Check out live demo.