https://github.com/iamolegga/collection-decorator

Decorator for adding to collection
https://github.com/iamolegga/collection-decorator

Last synced: 6 months ago
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Decorator for adding to collection

• Host: GitHub
• URL: https://github.com/iamolegga/collection-decorator
• Owner: iamolegga
• License: mit
• Created: 2019-10-09T14:55:39.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2023-01-04T22:24:42.000Z (almost 3 years ago)
• Last Synced: 2025-03-10T19:42:28.809Z (7 months ago)
• Language: TypeScript
• Size: 268 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 10
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# collection-decorator

Decorator for adding to collection

[![npm](https://img.shields.io/npm/v/collection-decorator)](https://www.npmjs.com/package/collection-decorator)

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![David](https://img.shields.io/david/iamolegga/collection-decorator)

Typical usecase for this library:

```ts

// HasFoo.ts

import { createCollectionDecorator } from 'collection-decorator';

interface ClassType {

  foo: number;

}

const { collection, decorator } = 

  createCollectionDecorator();

export function fooSum() {

  let sum = 0;

  for (let value of collection.values()) {

    sum += value.foo

  }

  return sum;

}

export const HasFoo = decorator;

```

```ts

// A.ts

import { HasFoo } from './HasFoo.ts';

@HasFoo

export class A {

  static foo = 1;

}

```

```ts

// B.ts

import { HasFoo } from './HasFoo.ts';

@HasFoo

//^^^^^ TS error because class B has not `foo` property

export class B {}

// So fix it:

@HasFoo

export class B {

  static foo = 2;

}

```

```ts

// sum.ts

import { fooSum } from './HasFoo.ts';

fooSum() // 3

```