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[英]Typescript: How to use key type as enum in an object keep all enum values as optional?
[英]How to use enum values as a type
我有一個枚舉
export enum AudioActionTypes {
UpdateMusicData = 'UPDATE_MUSIC_DATA',
UpdateVoiceData = 'UPDATE_VOICE_DATA',
UpdateSoundData = 'UPDATE_SOUND_DATA',
}
以及一個正在調度事件以更新全局上下文的函數。
const onVolumeChange = (value: number, audioActionType: AudioActionTypes[keyof typeof AudioActionTypes]) => {
audioDispatch({
type: audioActionType,
payload: { volume: value / 100 },
});
};
我想讓打字稿明白我只傳遞了 AudioActionTypes。 如果我將audioType
的類型設置為枚舉本身( AudioActionTypes )( audioActionType: AudioActionTypes
),打字稿會抱怨並拋出此錯誤。
Argument of type '{ type: AudioActionTypes; payload: { volume: number; }; }' is not assignable to parameter of type 'AudioActions'.
Type '{ type: AudioActionTypes; payload: { volume: number; }; }' is not assignable to type '{ type: AudioActionTypes.UpdateSoundData; payload: ISoundSettings; }'.
Types of property 'type' are incompatible.
Type 'AudioActionTypes' is not assignable to type 'AudioActionTypes.UpdateSoundData'.
audioDispatch有這種類型。
type AudioActions = {
type: AudioActionTypes.UpdateMusicData;
payload: IMusicSettings;
} | {
type: AudioActionTypes.UpdateVoiceData;
payload: IVoiceSettings;
} | {
type: AudioActionTypes.UpdateSoundData;
payload: ISoundSettings;
}
const audioDispatch: React.Dispatch<AudioActions>;
我應該如何管理 audioActionType 參數的類型,以便我可以使用此參數調用函數並且沒有任何類型錯誤?
onVolumeChange(4, AudioActionTypes.UpdateVoiceData);
您可以只使用AudioActionTypes
作為參數的類型。
const onVolumeChange = (value: number, audioActionType: AudioActionTypes) => { }
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