utils

actionTypes

const randomString = () =>
  Math.random().toString(36).substring(7).split('').join('.')
const ActionTypes = {
  INIT: `@@redux/INIT${/* #__PURE__ */ randomString()}`,
  REPLACE: `@@redux/REPLACE${/* #__PURE__ */ randomString()}`,
  PROBE_UNKNOWN_ACTION: () => `@@redux/PROBE_UNKNOWN_ACTION${randomString()}`
}
export default ActionTypes

symbol-observable

// SymbolConstructor与Symbol并没有关系
declare global {
  interface SymbolConstructor {
    readonly observable: symbol
  }
}
// 假设如果存在  判断是否支持Symbol语法 不支持就取 (() => '@@observable')() = '@@observable'
// Symbol的唯一降级到约定@@observable作为唯一
const $$observable = /* #__PURE__ */ (() =>
  (typeof Symbol === 'function' && Symbol.observable) || '@@observable')()
export default $$observable