1.ref
class AutoFocusInput extends Component {
componentDidMount () {
this.input.focus()
}
render () {
return (
<input ref={(input) => this.input = input} />
)
}
}
ReactDOM.render(
<AutoFocusInput />,
document.getElementById('root')
)
2.ref
<textarea
ref={(textarea) => this.textarea = textarea}
value={this.state.content}
onChange={this.handleContentChange.bind(this)} />
handleUsernameBlur (event) {
this._saveUsername(event.target.value)
}
