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如何使用TypeScript键入枚举值?

enums typescript

0

Dennis Vash · 技术社区 · 6 年前

enum :

export enum IconNames {
  DEFAULT = 'DEFAULT',
  MOVE = 'MOVE',
  RESIZE = 'RESIZE',
  ADD = 'ADD',
  CANCEL = 'CANCEL',
  CLOSE = 'CLOSE',
}

name isTransform 所以我只能用 IconNames 价值:

/* Tried `string` which doesn't work 
as `name` supposed to be enum's value */

const isTransform = (name: any) => [IconNames.MOVE, IconNames.RESIZE, IconNames.ADD].includes(name);

我需要为它构建一个接口吗?我怎么用?

How to build a type from enum values in TypeScript?

1 回复 | 直到 6 年前

1

thedude 6 年前

function isTransform(name: string): boolean {
  const transformValues: string[] = [IconNames.MOVE, IconNames.RESIZE, IconNames.ADD]
  return transformValues.indexOf(name) > -1
}

这同样有效:

function isTransform(name: IconNames): boolean {
  const transformValues = [IconNames.MOVE, IconNames.RESIZE, IconNames.ADD]
  return transformValues.indexOf(name) > -1
}

isTransform 只有 IconNames 值或使用 string ?