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index.js
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index.js
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import React from 'react'
import ReactDom from 'react-dom'
import createStepLogger from '../createStepLogger'
export default {
description: 'Log Owner Reasons',
fn({domElement, whyDidYouRender}){
const stepLogger = createStepLogger()
whyDidYouRender(React)
const Child = () => null
Child.whyDidYouRender = true
const Owner = () => <Child />
class ClassOwner extends React.Component{
state = {a: 1}
componentDidMount(){
this.setState({a: 2})
}
render(){
return <Child />
}
}
function HooksOwner(){
/* eslint-disable no-unused-vars */
const [a, setA] = React.useState(1)
const [b, setB] = React.useState(1)
/* eslint-enable */
React.useEffect(() => {
setA(2)
setB(2)
}, [])
return <Child />
}
stepLogger('First render')
ReactDom.render(<Owner a={1} />, domElement)
stepLogger('Owner props change', true)
ReactDom.render(<Owner a={2} />, domElement)
stepLogger('Owner state change', true)
ReactDom.render(<ClassOwner />, domElement)
stepLogger('Owner hooks changes', true)
ReactDom.render(<HooksOwner />, domElement)
}
}