fliphub-monorepo/modules-sub/flip-webpack-chain/src/ChainedSet.js

the builder of builders

const Chainable = require('./Chainable')

module.exports = class extends Chainable {
  constructor(parent) {
    super(parent)
    this.store = new Set()
  }

  add(value) {
    this.store.add(value)
    return this
  }

  prepend(value) {
    this.store = new Set([value, ...this.store])
    return this
  }

  clear() {
    this.store.clear()
    return this
  }

  delete(value) {
    this.store.delete(value)
    return this
  }

  values() {
    return [...this.store]
  }

  has(value) {
    return this.store.has(value)
  }

  merge(arr) {
    this.store = new Set([...this.store, ...arr])
    return this
  }
}