Javascript TypeError： undefined 不是构造函数 (评估 'new _Team.GameTeam('name'， 'null')')

Question

每当我尝试在React Native中编译时，我都会得到TypeError。下面是我试图创建实例的类:

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

我刚刚创建了:

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

我也试过将const改为var，但没有任何效果。

如果它有助于解决问题，下面是主文件

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

我所看到的唯一不同之处在于这个文档中有一个;在构造函数的末尾，可能不会给出语法错误，也可能阻止它工作

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
}
}