https://github.com/bakerface/ts-mixin

A type-only package for creating mixins in TypeScript
https://github.com/bakerface/ts-mixin

Last synced: 3 months ago
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A type-only package for creating mixins in TypeScript

• Host: GitHub
• URL: https://github.com/bakerface/ts-mixin
• Owner: bakerface
• Created: 2021-04-04T16:00:28.000Z (about 5 years ago)
• Default Branch: master
• Last Pushed: 2021-04-04T16:25:35.000Z (about 5 years ago)
• Last Synced: 2025-09-01T08:02:53.122Z (8 months ago)
• Size: 1.95 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# ts-mixin

**A type-only package for creating mixins in TypeScript**

``` typescript

import type { Mixin } from "@bakerface/ts-mixin";

interface AmountFeatures {

  getAmount(): number;

  setAmount(n: number): void;

}

interface AddFeatures {

  add(a: number): void;

}

const withAdd: Mixin = (Base) =>

  class extends Base implements AddFeatures {

    add(n: number): void {

      this.setAmount(this.getAmount() + n);

    }

  };

interface SubtractFeatures {

  subtract(n: number): void;

}

const withSubtract: Mixin = (Base) =>

  class extends Base implements SubtractFeatures {

    subtract(n: number): void {

      return this.add(-n);

    }

  };

class Amount implements AmountFeatures {

  constructor(private amount: number) {}

  getAmount(): number {

    return this.amount;

  }

  setAmount(n: number): void {

    this.amount = n;

  }

}

const Calculator = withSubtract(withAdd(Amount));

const calculator = new Calculator(0);

calculator.add(5);

calculator.subtract(3);

calculator.getAmount(); // 2

```