SOURCE

// 默认参数代替短路 Falsy值，
// 如''，""，false，null，0，和NaN将不会被默认值替代：
function demo(text= '2022') {
    console.log(text)
}
demo()
demo(333)

//  用动态键值对替换开关（即对象文字）
const UserRole = {
  ADMIN: "Admin",
  GENERAL_USER: "GeneralUser",
  SUPER_ADMIN: "SuperAdmin",
};
function getRoute(userRole = "default role"){


  switch(userRole){
    case UserRole.ADMIN:
      return "/admin"
    case UserRole.GENERAL_USER:
        return "/GENERAL_USER"
    case UserRole.SUPER_ADMIN:
        return "/superadmin"
    default:
      return "/" 
  }

}
console.log(getRoute(UserRole.ADMIN))
console.log(getRoute(UserRole.GENERAL_USER))
console.log(getRoute(UserRole.SUPER_ADMIN)) 
console.log(getRoute("Anything"))
console.log(getRoute())
console.log(getRoute(null)) 

// 用Object.assign设置默认对象
const someObject = {
  title: null,
  subTitle: "Subtitle",
  buttonColor: null,
  disabled: true
 };
 function creteOption(someObject) {
  const newObject = Object.assign({
   title: "Default Title",
   subTitle: "Default Subtitle",
   buttonColor: "blue",
   disabled: true
 },someObject)
 return newObject
 }
 console.log(creteOption(someObject));