Javascript TypeError: undefined is not a constructor (evaluating 'new _Team.GameTeam('name', 'null')')

Question

每当我尝试在 React Native 中编译时，我总是收到 TypeError。这是 class 我正在尝试创建一个实例：

class GameTeam {
    constructor(name, logoLocation)
    {
        this.name = name;
        this.logoLocation = logoLocation;
    };

    getTeamName() {
        return this.name;
    }

    getTeamLogoLocation() {
        return this.logoLocation
    }
}

我只是用：

const home = new GameTeam('name', 'null');

我也尝试过将 const 更改为 var，但没有做任何事情。

如果它有助于解决问题，这里是主文件L

import { GameTeam } from './objects/Team'
import React from 'react';
import { Image, StyleSheet, Text, View } from 'react-native';
import { useFonts } from 'expo-font'
import { VersusScore } from './components/VersusScore';

export default function App() {
  const home = new GameTeam('Tigers', 'null');
  const away = new GameTeam('Raiders', 'null');
  return (
    <View style={mainStyles.container}>
      <View style={mainStyles.topBar}>
        <Image style={mainStyles.navIcon_small} source={require('./assets/Icons/Inactive/Settings_Icon.png')} />
        <Text style={mainStyles.Title}>BRC</Text>
        <Image style={mainStyles.navIcon_small} source={require('./assets/Icons/Inactive/Announcements_Icon.png')} />
      </View>
      <VersusScore homeTName={home} awayTName={away} />
    </View>
  );
}

Answer 1

我看到的这个和文档的唯一区别是有一个;在可能不会给出语法错误的构造函数的末尾也可能会阻止它工作

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes

Answer 2

原来我需要改变 class GameTeam 到第一个文件中的 export default class GameTeam，因为它是一个单独的文件，现在它看起来像这样：

export default class GameTeam {
    constructor(name, logoLocation)
    {
        this.name = name;
        this.logoLocation = logoLocation;
    }

    getTeamName() {
        return this.name;
    }

    getTeamLogoLocation() {
        return this.logoLocation
    }
}

Javascript TypeError: undefined is not a constructor (evaluating 'new _Team.GameTeam('name', 'null')')

Javascript TypeError: undefined is not a constructor (evaluating 'new _Team.GameTeam('name', 'null')')

javascript

constructor

reactjs

react-native

expo