|
1 |
| -import React, { Component } from 'react' |
2 |
| -import PropTypes from 'prop-types' |
| 1 | +import { useRef, useState, useEffect } from 'react' |
3 | 2 |
|
4 |
| -import styles from './styles.css' |
| 3 | +const useLifecycleHelpers = (state = {}, props = {}) => { |
| 4 | + const [prevState, setPrevState] = useState(state) |
| 5 | + const [prevProps, setPrevProps] = useState(props) |
| 6 | + |
| 7 | + /** |
| 8 | + * useComponentDidMount() is invoked immediately after a component is mounted. |
| 9 | + this is a good place to instantiate the network request. |
| 10 | +
|
| 11 | + This method is a good place to set up any subscriptions. |
| 12 | + If you do that, don’t forget to unsubscribe in componentWillUnmount(). |
| 13 | +
|
| 14 | + You may call setState() immediately in useComponentDidMount(). |
| 15 | + It will trigger an extra rendering. |
| 16 | + * @param {Function} callback |
| 17 | + */ |
| 18 | + const useComponentDidMount = (callback) => { |
| 19 | + |
| 20 | + } |
| 21 | + |
| 22 | + /** |
| 23 | + * useComponentDidUpdate() is invoked immediately after updating occurs. |
| 24 | + This method is not called for the initial render. |
| 25 | +
|
| 26 | + Use this as an opportunity to operate on the DOM when the component has been updated. |
| 27 | + This is also a good place to do network requests as long as you compare the current props to previous props (e.g. a network request may not be necessary if the props have not changed). |
| 28 | + * @param {Function} callback |
| 29 | + */ |
| 30 | + const useComponentDidUpdate = ( |
| 31 | + callback |
| 32 | + ) => { |
5 | 33 |
|
6 |
| -export default class ExampleComponent extends Component { |
7 |
| - static propTypes = { |
8 |
| - text: PropTypes.string |
9 | 34 | }
|
10 | 35 |
|
11 |
| - render() { |
12 |
| - const { |
13 |
| - text |
14 |
| - } = this.props |
| 36 | + /** |
| 37 | + * useOnDependenciesChange() is invoked immediately after one of the dependencies changed. |
| 38 | + * This is also a good place to do network requests as long as you compare the current dependencies to previous dependencies value |
| 39 | + * EXP : useOnDependenciesChange( |
| 40 | + prevState => { |
| 41 | + console.log('componentDidUpdate', state, prevState) |
| 42 | + }, |
| 43 | + [state] |
| 44 | + ) |
| 45 | + * @param {Function} callback |
| 46 | + * @param {Array} dependencies |
| 47 | + */ |
| 48 | + const useOnDependenciesChange = ( |
| 49 | + callback, |
| 50 | + dependencies |
| 51 | + ) => { |
15 | 52 |
|
16 |
| - return ( |
17 |
| - <div className={styles.test}> |
18 |
| - Example Component: {text} |
19 |
| - </div> |
20 |
| - ) |
| 53 | + } |
| 54 | + |
| 55 | + /** |
| 56 | + * useComponentWillUnmount() is invoked immediately before a component is unmounted and destroyed. |
| 57 | + * Perform any necessary cleanup in this method, such as invalidating timers, |
| 58 | + * canceling network requests, or cleaning up any subscriptions that were created in componentDidMount(). |
| 59 | +
|
| 60 | + * You should not call setState() in useComponentWillUnmount() because the component will never be re-rendered. |
| 61 | + * Once a component instance is unmounted, it will never be mounted again. |
| 62 | + * @param {Function} callback |
| 63 | + */ |
| 64 | + const useComponentWillUnmount = callback => { |
| 65 | + |
| 66 | + } |
| 67 | + |
| 68 | + return { |
| 69 | + useComponentDidMount, |
| 70 | + useOnDependenciesChange, |
| 71 | + useComponentDidUpdate, |
| 72 | + useComponentWillUnmount |
21 | 73 | }
|
22 | 74 | }
|
| 75 | + |
| 76 | +export default useLifecycleHelpers |
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