React TypeScript 2.3 -> typesafe React Bootstrap FormControl onChange

Question

使用此代码时，我收到错误 Property 'type' does not exist on type 'EventTarget'。 checked、value 和 name 也是如此。

按照代码我可以看到FormEvent 继承自SyntheticEvent，而target: EventTarget 又具有target: EventTarget。 EventTarget 没有我想要的属性。如果我将event 标记为any (event: any)，则代码可以完美运行。我怎样才能解决这个问题？我尝试使用普通的 Html 输入，然后通过将事件设置为 React.ChangeEvent<HTMLInputElement> 来工作。

handleChange(event: React.FormEvent<React.Component<ReactBootstrap.FormControlProps, {}>>) {
    const target = event.target;
    const value = target.type === 'checkbox' ? target.checked : target.value;
    const name = target.name;

    this.setState({
        [name]: value
    });
}
...
<FormGroup controlId="Email">
    <Col componentClass={ControlLabel} sm={2}>
        Email
    </Col>
    <Col sm={10}>
        <FormControl name="email" type="email" value={this.state.email} onChange={(event) => this.handleChange(event)} placeholder="Email" />
    </Col>
</FormGroup>

带输入的工作代码：

handleChange(event: React.ChangeEvent<HTMLInputElement>) {
    ...
}

...

<input
name="email"
type="email"
value={this.state.email}
onChange={(event) => this.handleChange(event)} />

Answer 1

这样解决了：

handleChange(event: React.ChangeEvent<HTMLInputElement>) {
    const target = event.target;
    const value = target.type === 'checkbox' ? target.checked : target.value;
    const name = target.name as any;

    this.setState({
        [name]: value
    });
}

...

<FormControl name="email" type="email" value={this.state.email} onChange={(event) => this.handleChange(event as any)} placeholder="Email" />