.keys() 获取枚举所有name。 import{createEnumObject}from'ts-enum-object';constTestEnum=createEnumObject([{name:'A',value:1,label:'AA',},{name:'B',value:2,label:'BB',},{name:'C',value:3,label:'CC',},]asconst);// as co
Enumeration is an object that really exists at runtime, one of the reasons is that it maps backwards from enumeration values to enumeration names. enum Enum{ A } let a=Enum.A; let nameOfA=Enum[Enum.A];//A 1. 2. 3. 4. 5. 引用枚举成员总会生成一次属性访问并且永远不会内联。 在大多...
enum 枚举名 { 可取值1,可取值2,.. } 1. 说明: 使用enum关键字定义枚举 一般约定首字符大写 使用格式 枚举名.可取值 1. 示例 // 定义枚举类型 enum Direction { Up, Down, Left, Right } // 使用枚举类型 function changeDirection(direction: Direction) { console.log(direction) } // 调用函数时,需...
Object.create(b):((__.prototype=b.prototype),new__());};varAnimal=(function(){functionAnimal(name){this.name=name;}returnAnimal;})();varCat=(function(_super){__extends(Cat,_super);functionCat(){_super.
For example, we will create an enum Country with three properties (USA, UK, and Australia). Then we will define a function ‘getKeyByStringValue’ using the object.key returns an array of keys i.e. property name from the enum objects, and then we will filter the array to get the key...
: string; } function createUser(user: Required<User>): void { // 创建用户 // ... ...
另外这里出现了as,TS支持的数据类型有:boolean、number、string、T[]|Array<T>、元组、枚举enum、任意any、空void、undefined、null、永不存在的值的类型never、非原始类型object,有时候你会确切的知道某个值是什么类型,可能会比TS更准确,那么可以通过as来指明它的类型,这称作类型断言,这样TS就不再进行判断了。
createStreetLight(["red","yellow","green"],"blue"); // ~~~ // error! //Argumentoftype'"blue"'isnotassignable to parameteroftype'"red"|"yellow"|"green"| undefined'. Excluding the type ofdefaultColorfrom being explored for inference means that"blue"never ends up as an inference candida...
export const enum ApplyOrder { Pre = 'pre', Post = 'post' } enum的意思是枚举,可以定义一些带名字的常量,使用枚举可以清晰的知道可选的选项是什么,枚举支持数字枚举和字符串枚举,数字枚举还有自增的功能,上述通过const来修饰的枚举称为常量枚举,常量枚举的特点是在编译阶段会被删除而直接内联到使用的地方。
create is invoked by ts-node at startup to create one or more transpiler instances. The instances are used to transform TypeScript into JavaScript. For a working example, check out out our bundled swc plugin: https://github.com/TypeStrong/ts-node/blob/main/src/transpilers/swc.ts Module ...