Bring in all iterable arrays from TypeScript using the import statement

How can TypeScript be used to access multiple classes from different files as an array?

Consider the following folder structure:

├── index.ts
└── models
    ├── index.ts
    ├── image.entity.ts
    └── user.entity.ts

In the file image.entity.ts:

export class Image { }

In the file user.entity.ts:

export class User { }

Within models/index.ts:

export * from './image.entity';
export * from './user.entity';

To achieve the desired output in index.ts:

import * as models from './models/index';
// Accessing elements in models as an iterable array
console.log(models.length) // Output: 2

Answer №1

To loop through the models object, you can use either Object.keys, Object.values, or Object.entries. Keep in mind that for the latter two methods to work, you must include es2017 in the --lib option.

If you prefer models to be an array, you can achieve this by following these steps:

image.entity.ts

export default class Image { }

user.entity.ts

export default class User { }

index.ts

import Image from './image.entity';
import User from './user.entity';

export default [
  Image,
  User,
]

Afterwards, import it like so:

import models from './models';

console.log(models.length) // Outputs: 2

It's worth noting that while using default imports/exports is optional, they do come in handy and can help reduce the need for aliasing (* as x).

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