Reactive Map and Set for Vue 2.7

npm i vue-reactive-collection

yarn add vue-reactive-collection

import { defineComponent } from '@vue/composition-api'
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.

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.

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],
])

npm test

npm run build

MIT