TypeScript 将类型或接口设置为枚举的任何成员

Question

我想知道为枚举的任何成员设置类型值的最佳方法是什么。

例子

enum daysOfWeekEnum{
    mon = 'Monday',
    tue = 'Tuesday',
    wed = 'Wednesday', 
    thu = 'Thursday',
    fri = 'Friday',
    sat = 'Saturday',
    sun = 'Sunday'
}
//any day of week
type dayOfWeek = daysOfWeekEnum

//effective assign the values in this way
type day = 'Monday' | 'Tuesday' | 'Wednesday'

Answer 1

枚举本身就是一种类型，可以表示声明值集中的任何值。

enum daysOfWeekEnum {
    mon = 'Monday',
    tue = 'Tuesday',
    wed = 'Wednesday', 
    thu = 'Thursday',
    fri = 'Friday',
    sat = 'Saturday',
    sun = 'Sunday'
}

let day: daysOfWeekEnum = daysOfWeekEnum.mon;

function log(value: daysOfWeekEnum) {
    console.log(value);
}

log(day); // ok -- prints "Monday"
log("Monday"); // ok -- prints "Monday"
log("asdfa"); // not ok - typescript error, "asdfa" is not a daysOfWeekEnum value

TypeScript 将类型或接口设置为枚举的任何成员

TypeScript set a type or interface to be any member of an enum

enums

types

interface

typescript