@vates/decorate-with

Creates a decorator from a function wrapper

Install

Installation of the npm package:

npm install --save @vates/decorate-with

Usage

decorateWith(fn, ...args)

Creates a new (legacy) method decorator from a function decorator, for instance, allows using Lodash's functions as decorators:

import { decorateWith } from '@vates/decorate-with'

class Foo {
  @decorateWith(lodash.debounce, 150)
  bar() {
    // body
  }
}

decorateClass(class, map)

Decorates a number of accessors and methods directly, without using the decorator syntax:

import { decorateClass } from '@vates/decorate-with'

class Foo {
  get bar() {
    // body
  }

  set bar(value) {
    // body
  }

  baz() {
    // body
  }
}

decorateClass(Foo, {
  // getter and/or setter
  bar: {
    // without arguments
    get: lodash.memoize,

    // with arguments
    set: [lodash.debounce, 150],
  },

  // method (with or without arguments)
  baz: lodash.curry,
})

The decorated class is returned, so you can export it directly.

To apply multiple transforms to an accessor/method, you can either call decorateClass multiple times or use @vates/compose:

decorateClass(Foo, {
  baz: compose([
    [lodash.debounce, 150]
    lodash.curry,
  ])
})

decorateObject(object, map)

Decorates an object the same way decorateClass() decorates a class:

import { decorateObject } from '@vates/decorate-with'

const object = {
  get bar() {
    // body
  },

  set bar(value) {
    // body
  },

  baz() {
    // body
  },
}

decorateObject(object, {
  // getter and/or setter
  bar: {
    // without arguments
    get: lodash.memoize,

    // with arguments
    set: [lodash.debounce, 150],
  },

  // method (with or without arguments)
  baz: lodash.curry,
})

perInstance(fn, ...args)

Helper to decorate the method by instance instead of for the whole class.

This is often necessary for caching or deduplicating calls.

import { perInstance } from '@vates/decorateWith'

class Foo {
  @decorateWith(perInstance, lodash.memoize)
  bar() {
    // body
  }
}

Because it's a normal function, it can also be used with decorateClass, with compose or even by itself.

decorateMethodsWith(class, map)

Deprecated alias for decorateClass(class, map).

Contributions

Contributions are very welcomed, either on the documentation or on the code.

You may:

• report any issue you've encountered;
• fork and create a pull request.

License

ISC © Vates SAS