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enum-plus

A powerful enum library, like typescript enum but more than that

  • 1.0.3
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enum-plus

An enumeration library similar to typescript's enum keyword, but extended with some enhanced features.

生成一个枚举集合,枚举值支持 numberstring 两种类型。

Installation

Install using yarn:

yarn add enum-plus

Or npm:

npm install enum-plus

枚举定义

示例 1:number 类型

import { Enum } from 'enum-plus';

const Week = Enum({
  Sunday: 0,
  Monday: 1,
} as const);

示例 2:string 类型

import { Enum } from 'enum-plus';

const Week = Enum({
  Sunday: 'Sunday',
  Monday: 'Monday',
} as const);

示例 3(标准写法,推荐):扩展 label 显示文本

import { Enum } from 'enum-plus';

const Week = Enum({
  Sunday: { value: 0, label: '星期日' },
  Monday: { value: 1, label: '星期一' },
} as const);

示例 4(推荐):省略 label,value 的默认值为 key

import { Enum } from 'enum-plus';

const Week = Enum({
  Sunday: { label: '星期日' }, // 等价于 { value: "Sunday", label: '星期日' }
  Monday: { label: '星期一' }, // 等价于 { value: "Monday", label: '星期一' }
} as const);

示例 5:与示例 2 等价,value 的默认值为 key

import { Enum } from 'enum-plus';

const Week = Enum({
  Sunday: undefined, // 等价于 { value: "Sunday" }
  Monday: undefined, // 等价于 { value: "Sunday" }
} as const);

示例 6:扩展自定义字段

import { Enum } from 'enum-plus';

const Week = Enum({
  Sunday: { value: 0, label: '星期日', active: true, disabled: false },
  Monday: { value: 0, label: '星期日', active: false, disabled: true },
} as const);
// Week.raw('Sunday').active // true
// Week.raw('Monday').disabled // true

使用方法

直接作为 Select 的数据源

<Select options={Week.values} />

在头部增加默认选项(默认文本为'全部',value 为'')

<Select options={Week.options({ firstOption: true })} />

在头部增加自定义选项

<Select options={Week.options({ firstOption: { value: 0, label: '不限' } as const })} />

使用 AntDesignPro

<ProFormSelect valueEnum={Week.valuesEnum()} />

支持所有数组遍历,但不支持任何形式的修改

Week.values.length; // 2
Week.values.map((item) => item.value); // [0, 1],可遍历
Week.values.forEach((item) => {}); // 可遍历
for (let item of Week.values) {
} // 可遍历
Week.values.push({ value: 2, label: '星期二' }); // ❌ 不可修改
Week.values[0].label = 'foo'; // ❌ 不可修改

获取第一个枚举项的值

Week.values[0].value; // 0

判断某个值是否有效?

Week.values.some(item => item.value === 1); // true
if(1 instance of Week) // true,更简单的用法

instanceof 操作符

1 instance of Week // true
"1" instance of Week // true
"Monday" instance of Week // true

获取某个值的显示文本

Week.label(1); // 星期一,
Week.label(Week.Monday); // 星期一
Week.label('Monday'); // 星期一

获取某个枚举项的 key

Week.key(1); // 'Monday'
Week.key(Week.Monday); // 'Monday'
Week.key(9); // undefined

两个枚举合并(或者扩展某个枚举)

const myWeek = Enum({
...Week.raw(),
Friday: 5,
Saturday: 6,
};

给枚举字段声明类型,【强烈建议】

type Props = {
  week: typeof Week.valueType; // 0 | 1
  weekName: typeof Week.keyType; // 'Sunday' | 'Monday'
};

使用 valueType 类型可以更准确的限定取值范围,比使用 number、string 这种宽泛的数据类型更好

😟 命名冲突?

如果 Weekkeylabeloptions 方法与某个枚举的 key 重名了,则这些方法会被覆盖掉。不用担心,在 Week.values 下仍然可以访问到这些方法

Keywords

FAQs

Package last updated on 14 Nov 2023

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