vue-reactive-collection

Installation

Reactive Map and Set for Vue 2 using vue-demi plugin.

NPM

$ npm i vue-reactive-collection

Yarn

$ yarn add vue-reactive-collection

Usage

import { defineComponent } from 'vue'
import { useReactiveSet, useReactiveMap } from 'vue-reactive-collection'

export default defineComponent({
  // ...
  setup() {
    const set = useReactiveSet()
    const map = useReactiveMap()

    return {
      set,
      map,
    }
  },
})

set and map will have the same methods as native Set and Map. They can be accessed via .value as you would do it with ref. The beauty of it is that they are completely reactive, so calling set.value.add/delete/clear or map.value.set/delete/clear will cause a template rerender.

Motivation

One of the Vue 2 drawbacks is the lack of a first class support for Map and Set. Though it has been recently implemented in Vue 3. The purpose of this library is to allow the usage of Map and Set in Vue 2 as you would use them in Vue 3.

During Vue 3 migration useReactiveSet and useReactiveMap will be replaced with Vue ref.

const set = useReactiveSet()

will become

const set = ref(new Set())

That's it, that simple.

The idea was adopted from @inca comment in this issue.

Q&A

How to pass an initial value

You can pass an initial value as you would it with native Map and Set.

const fruits = useReactiveSet(new Set(['apple', 'pear']))
const vegetables = useReactiveSet(['cabbage', 'onion'])

const fruits = useReactiveMap(
  new Map([
    ['apple', true],
    ['pear', true],
  ]),
)
const vegetables = useReactiveMap([
  ['cabbage', true],
  ['onion', true],
])

Tests

npm test

Build

npm run build

License

MIT