我是ReactJS的新手,正在跟随Udemy上的React基础课程学习。控制台日志中出现了以下错误。有谁能帮忙解决一下吗?
bundle.js:21818 Uncaught TypeError: _this2.props.selectBook is not a function
任何帮助都将不胜感激。谢谢。
容器/书籍列表.js
import React, { Component } from 'react';
import { connect } from 'react-redux';
import { selectBook } from '../actions/index';
import { bindActionCreators } from 'redux';
class BookList extends Component {
renderList() {
return this.props.books.map((book) => {
return (
<li
key={book.title}
onClick={() => this.props.selectBook(book)}
className="list-group-item">
{book.title}
</li>
);
});
}
render() {
return (
<ul className="list-group col-sm-4">
{this.renderList()}
</ul>
)
}
}
function mapStateToProps(state) {
return {
books: state.books
};
}
//Anythin returned from this function will end up as props
// on the BookList container
function mapDispatchToProps(dispatch) {
// whenever selectBook is called, the result should be passed
// to all of our reducers
return bindActionCreators({ selectBook: selectBook }, dispatch);
}
// Promote BookList from a component to a container - it needs to know
// about this new dispatch method, selectBook. Make it available
// as a prop.
export default connect(mapStateToProps)(BookList);
actions/index.js
export function selectBook(book) {
console.log('A book has been selected:', book.title);
}
components/app.js
import React, { Component } from 'react';
import BookList from '../containers/book-list';
export default class App extends Component {
render() {
return (
<div>
<BookList />
</div>
);
}
}
selectBook
变量的文件。 - kind user