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component.js
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component.js
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import PropTypes from 'prop-types' // eslint-disable-line
import * as React from 'react' // eslint-disable-line
export default class MyComponent extends React.Component {
static propTypes = {
string: PropTypes.string,
number: PropTypes.number.isRequired,
func: PropTypes.func.isRequired,
}
static defaultProps = {
string: 'foo',
}
static staticMethod() {
return 'foo'
}
static staticProperty = 'bar'
constructor(props) {
super(props)
props.func('constructor')
}
instanceVariable = 10
state = {
stateA: 'bar',
}
static getDerivedStateFromProps(nextProps) {
return {nextProps}
}
componentDidMount() {
const {func} = this.props
func('mounted')
}
handleMouseEnter = event => {
this.doSomething(event)
}
handleMouseLeave = event => {
this.doSomething(event)
}
getSomething() {
const {number} = this.props
return number + this.instanceVariable
}
doSomething = () => {
const {func} = this.props
const {stateA} = this.state
func(stateA)
}
renderSomething() {
const {string} = this.props
return <span>{string}</span>
}
renderSomethingElse() {
const {number} = this.props
return <span>{number}</span>
}
render() {
return (
<React.Fragment>
<div onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
{this.getSomething()}
</div>
{this.renderSomething()}
{this.renderSomethingElse()}
</React.Fragment>
)
}
}