我有以下反应成分:
class Button extends React.Component {
constructor(props){
super(props);
this.state = { disabled: false };
}
render() {
return <button disabled={this.state.disabled} onClick={this.clicked.bind(this)}>Save</button>;
}
clicked(event) {
this.setState({disabled: true});
}
}
class Form extends React.Component {
contructor(props) {
super(props);
this.state = { foo: "bar" };
}
render() {
return (
<form onSubmit={this.submit.bind(this)}>
<input valueDefault={this.state.foo} />
<Button />
</form>
);
}
submit(event) {
event.preventDefault();
// do some stuff
}
}
但是,单击该按钮时会触发单击的方法,但不会触发提交方法。有什么方法可以让事件传播?是否有某些原因导致事件不像普通的html表单事件一样传播?
答案 0 :(得分:0)
由于setState将重新呈现整个组件,因此事件将停在那里,并且无法继续直到祖先形成。相反,您可以在表单的onSubmit中处理按钮禁用。像这样的东西
class Button extends React.Component {
constructor(props){
super(props);
this.state = { disabled: false };
}
render() {
return <button disabled={this.state.disabled}>Save</button>;
}
clicked(event) {
this.setState({disabled: true});
}
}
class Form extends React.Component {
constructor(props) {
super(props);
this.state = { foo: "bar" };
}
render() {
return (
<form onSubmit={this.submit.bind(this)}>
<input valueDefault={this.state.foo} />
<Button ref="button" onSubmit={this.submit.bind(this)}/> <----- Added reference here
</form>
);
}
submit(event) {
event.preventDefault();
var button = this.refs.button; // <---- Added ref to button
button.setState({disabled: true}); <---- set disabled state to button
}
}