https://github.com/writetome51/get-class-modification-decorator

Returns a TypeScript ClassDecorator factory.
https://github.com/writetome51/get-class-modification-decorator

class decorator factory function typescript

Last synced: 18 days ago
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Returns a TypeScript ClassDecorator factory.

• Host: GitHub
• URL: https://github.com/writetome51/get-class-modification-decorator
• Owner: writetome51
• License: mit
• Created: 2019-11-13T02:24:47.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2020-08-09T01:51:29.000Z (over 4 years ago)
• Last Synced: 2024-12-09T05:24:05.563Z (about 1 month ago)
• Topics: class, decorator, factory, function, typescript
• Language: TypeScript
• Homepage:
• Size: 33.2 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# getClassModificationDecorator(
      modifyInstance: (
            instance, decoratorArgs: any[]
      ) => void
): (...decoratorArgs) => ClassDecorator

Returns a TypeScript ClassDecorator factory. You set the decorator behavior with the  

callback `modifyInstance()`. The decorator creates a new constructor for the class  

being decorated. The new constructor first calls the original, then the class instance  

is passed into `modifyInstance()`, where you manipulate it however you want. (The  

prototype chain is kept intact, and the `instanceof` operator will still work.)

## Examples

```ts

// Here we make a decorator that adds properties:

export const add_properties = getClassModificationDecorator(

    (instance, decoratorArgs: [object]) => {

        let newProperties = decoratorArgs[0];

        Object.assign(instance, newProperties);

    }

);

// Now use it:

@add_properties({hair: 'amazing', age: 50, income: 200000, wife: 'hot'})

export class Boss {

}

@add_properties({address: '100 fleet street', income: 600000})

export class CEO extends Boss {

}

let ceo = new CEO();

console.log(ceo);

/*************

CEO {

  age: 50,

  address: '100 fleet street',

  hair: 'amazing',

  income: 600000,

  wife: 'hot' 

}

**************/

```

## Installation

```bash

npm i  @writetome51/get-class-modification-decorator

```

## Loading

```js

import {getClassModificationDecorator} 

    from '@writetome51/get-class-modification-decorator';

```