我目前遇到问题,我的选择下拉列表默认值被国家/地区覆盖。可能是我想念的简单事情,但是谁能告诉我我做错了什么?
单击按钮后,我想提交表单,但是直到我更改它,才会选择州的第一个值?
请让我知道我是否不清楚或需要其他信息。
谢谢!
//Wrapping container containing the state
class ActionsSegment extends Component {
constructor(props) {
super(props);
this.state = { value: '' };
this.handleChange = this.handleChange.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
}
handleChange = (event) => {
this.setState({value: event.target.value});
console.log(event.target.value);
}
handleSubmit(event) {
console.log((`State passed is: ${this.state.value}`));
event.preventDefault();
}
render() {
const { select, selectLabelTitle } = this.props;
return (
<form className="actions-segment" onSubmit={this.handleSubmit}>
<FormSelect
select={select}
selectLabelTitle={selectLabelTitle}
handleChange={this.handleChange}
value={this.state.value}
/>
</form>
)
}
}
export default ActionsSegment;
//Component containing the select dropdown
<select className="form-select form__flavour-dropdown" onChange={handleChange}>
{
select.map((type, index) => (
<option value={type.title} key={index}>{type.title}</option>
))
}
</select>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
答案 0 :(得分:0)
您可以使用所需的任何props值来初始化选择值:
this.state = { value: this.props.whatEverPropsYouLike }
或者您的情况可能是这样的:
this.state = { value: this.props.select[0].title }