使用webpack-5的库时的一个问题目标:窗口

Question

我正在使用single-spa创建我的应用程序。当我加载微前端应用时，我没有使用SystemJS，如下所示：

export const runScript = async (url: string) => {
  return new Promise((resolve, reject) => {
    const script = document.createElement('script');
    script.src = url;
    script.onload = resolve;
    script.onerror = reject;

    const firstScript = document.getElementsByTagName('script')[0];
    (firstScript as any).parentNode.insertBefore(script, firstScript);
  });
};

const loadApp = async (appPath: string) => {
  try {
    await runScript(`/${appPath}/index.js`);
    console.log(appPath, '=', (window as any)[appPath]);
  } catch {
    console.log("load child app's javascript file error。");
  }
  return (window as any)[appPath];
};

singleSpa.registerApplication({
  name: 'app1',
  app: () => loadApp('app1'),
  activeWhen: '/app1,
  customProps: {
  },
});

所以，我在App1的webpack配置中使用了libraryTarget:'window'。

devServer: {
  //...
  libraryTarget:'window'
},

当我使用webpack4时，它工作得很好。

但是当我将webpack更新为webpack -5时，它似乎有一些错误，由webpack生成的输出代码无法将正确的值设置为窗口对象。

webpack-4：works fine at webpack-4

webpack-5：nothing in the object

这是webpack五号的问题吗？

Answer 1

我个人将webpack5用于我的单spa-angular组件。我有umd作为libraryTarget

 "customWebpackConfig": {
     "path": "./extra-webpack.config.js",
     "libraryName": "mylib",
     "libraryTarget": "umd"
 }

https://github.com/milobella/application-web/blob/master/spa-menu/angular.json#L36-L37

当加载脚本https://github.com/milobella/application-web/blob/master/portal/src/main.ts#L9时，我的应用程序在window下