如果你不导出A, B, C中的默认值，而只是导出{}，那么这是可能的

// things/A.js
export function A() {}

// things/B.js
export function B() {}

// things/C.js
export function C() {}

// foo.js
import * as Foo from ./thing
Foo.A()
Foo.B()
Foo.C()

你也可以使用require:

const moduleHolder = []

function loadModules(path) {
  let stat = fs.lstatSync(path)
  if (stat.isDirectory()) {
    // we have a directory: do a tree walk
    const files = fs.readdirSync(path)
    let f,
      l = files.length
    for (var i = 0; i < l; i++) {
      f = pathModule.join(path, files[i])
      loadModules(f)
    }
  } else {
    // we have a file: load it
    var controller = require(path)
    moduleHolder.push(controller)
  }
}

然后使用动态加载控制器的moduleHolder:

  loadModules(DIR) 
  for (const controller of moduleHolder) {
    controller(app, db)
  }

这只是@Bergi回答的另一种方法

// lib/things/index.js
import ThingA from './ThingA';
import ThingB from './ThingB';
import ThingC from './ThingC';

export default {
 ThingA,
 ThingB,
 ThingC
}

Uses

import {ThingA, ThingB, ThingC} from './lib/things';

类似于公认的答案，但它允许你在每次创建索引文件时不需要添加一个新模块的情况下进行扩展:

/模块/ moduleA.js

export const example = 'example';
export const anotherExample = 'anotherExample';

/模块/ index.js

// require all modules on the path and with the pattern defined
const req = require.context('./', true, /.js$/);

const modules = req.keys().map(req);

// export all modules
module.exports = modules;

。/ example.js

import { example, anotherExample } from './modules'

我可以借鉴用户atilkan的方法并稍加修改:

对于Typescript用户;

require.context('@/folder/with/modules', false, /\.ts$/).keys().forEach((fileName => {
    import('@/folder/with/modules' + fileName).then((mod) => {
            (window as any)[fileName] = mod[fileName];
            const module = new (window as any)[fileName]();

            // use module
});

}));

Nodejs吗?这样做:

用index.js创建一个文件夹，在索引文件中添加以下内容:

var GET = require('./GET');
var IS = require('./IS');
var PARSE = require('./PARSE');
module.exports = { ...GET, ...IS, ...PARSE};

并且，在GET.js或IS.js文件中正常导出:

module.exports = { /* something as you like */}

现在，你只需要像这样包含index.js:

const Helper = require('./YourFolder');

Helper将包括你文件夹中的所有功能。

美好的一天!