Question

在编译一个简单的React应用程序时，我在文件的最后（空白）行收到一条错误消息，说“意外令牌”

import { Link, Redirect } from "react-router-dom";
import './App.css';


class Companies extends Component {
    constructor(props) {
        super(props);
        var user = null;
        if (props.hasOwnProperty("user")){
            user = props["user"];
        }
        this.state = {
            user: user,
            companies: [],
        };
    }

}

export Companies

是我正在尝试运行的代码

Failed to compile.

./src/Companies.js
  Line 22:1:  Parsing error: Unexpected token

  20 |
  21 | export Companies
> 22 |
     | ^

是我收到的错误消息。

Answer 1

要导出类，正确的语法为：export default Class

尝试一下：

import { Link, Redirect } from "react-router-dom";
import './App.css';


class Companies extends Component {
    constructor(props) {
        super(props);
        var user = null;
        if (props.hasOwnProperty("user")){
            user = props["user"];
        }
        this.state = {
            user: user,
            companies: [],
        };
    }

}

export default Companies

解析错误：基本的.js文件在EOF处出现意外的令牌“”

1 个答案: