可以按照以下方式实现转换函数: functionstringToEnumValue<T>(value:string,enumType:T):T[keyofT]|undefined{constenumValues=Object.values(enumType);for(constenumValueofenumValues){if(typeofenumValue==="string"&&enumValue.toLowerCase()===value.toLowerCase()){returnenumValue;}}returnundefined;} 1....
在TypeScript中,可以使用枚举的[枚举名][字符串]语法来获取对应的枚举成员。下面是一个简单的示例: enumDirection{Up,Down,Left,Right,}functiongetDirectionFromString(str:string):Direction{returnDirection[str];}constdirection=getDirectionFromString("Up");console.log(direction);// 输出:0 1. 2. 3. 4. ...
updateSize(Sizes.large); Interesting thing is that you can use enum as Type. This is what compile to Javscript: But if you add 'const' to enum: const enum Sizes { Small= "small", Medium= "medium", Large= "large" } It compiles to such smaller amount code, with only necessary info...
我对TypeScript是个新手,我很难理解下面的错误。 Type '{ order: string; }[]' is not assignable to type 'TestType[]'. Type '{ order: string; }' is not assignable to type 'TestType'. Types of property 'order' are incompatible. Type 'string' is not assignable to type 'number | ""'...
As of TypeScript 2.4, it is now possible to define string enums, or more precisely, enums with string members. Just like any other numeric enum, string enums can be made constant using theconstmodifier so that they disappear entirely from the generated JavaScript; in this case, all enum ...
TypeScript Version: 2.4.0 Code enum Colors { Red = "RED", Green = "GREEN", Blue = "BLUE", } const c1: Colors = Colors.Red; const c2: Colors = "RED"; Expected behavior: I'd expect both lines with c1 and c2 to work but only the first compi...
错误消息 type 'string' is not assignable to type 'number' as required for computed enum member values 指出在 TypeScript 中,枚举(enum)的成员值被期望为数字类型,但实际上被赋予了一个字符串类型的值。在 TypeScript 中,枚举成员默认是数值类型,除非显式地指定为其他类型(如字符串字面量类型,但这是在 ...
Defines values for StringIndexType. KnownStringIndexType can be used interchangeably with StringIndexType, this enum contains the known values that the service supports. Known values supported by the service TextElements_v8: Returned offset and length v
Before string based enums, many would fall back to objects. Using objects also allows extending of types. For example: const BasicEvents = { Start: "Start", Finish: "Finish" }; const AdvEvents = { ...BasicEvents, Pause: "Pause", Resume: ...
typescript enum string 转换 如何实现“typescript enum string 转换” 在TypeScript中,枚举(enum)是一种有限的,具名的值的集合。它们常常用来定义一组相关的常量或选项。有时候我们需要将枚举的值转换为对应的字符串,或者将字符串转换为对应的枚举值。本文将教会你如何实现这种转换。