class Demo extends React.Component {
constructor (props) {
super(props);
this.state = {
input_val: ''
};
}
inputValChange = e => {
this.setState({
input_val: e.target.value
});
}
render () {
return (
<input value={this.state.input_val} onChange={this.inputValChange} />
);
}
}
传递多个参数
inputValChange (e, params) {
this.setState({
input_val: e.target.value,
params
});
}
<input value={this.state.input_val} onChange={e => this.inputValChange(e, params)} />
