singleton-design-pattern-in-java-script_4.js

function LocalStorage(options) {
  let _data = {}
  let _options = options || {}

  return {
    get(key) {
      return _data[key]
    },
    set(key, value) {
      _data[key] = value
    },
    remove(key) {
      delete _data[key]
    },
    clear() {
      _data = {}
    },
  }
}

const createLocalStorage = (function () {
  return function createLocalStorage(options) {
    if (!ls) {
      ls = LocalStorage(options)
    }
    return ls
  }
})()