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[英]Typescript Interface, reference one instance property for dynamic second property
[英]Making a Dynamic callable typescript interface property
這是調色板的一部分,我在這里使用IPalette
界面:
{
warningColor: '#FFCA28',
smallWidgetBackground: ["rgba(255,255,255,0.15)", "rgba(255,255,255,0)"],
grayColorAlpha: (opacity: number) => `rgba(200, 209, 232, ${opacity})`,
welcome: {
primaryText: "#fff",
primaryTextAlpha: (alpha = 1) => `rgba(255,255,255,${alpha})`,
},
}
問題是我想創建一個具有動態屬性的接口,無論是作為字符串的鍵,還是鍵也是可調用的。
考慮這個例子:
type RGBA = `rgba(${number}, ${number}, ${number}, ${number})`
type Alpha = (opacity: number) => RGBA
type KeysHex = `${string}Color` | `${string}Text`
interface Data {
[color: KeysHex]: `#${string}`
[alpha: `${string}Alpha`]: Alpha
}
const foo: Data = {
criticalColor: '2' // expected error
}
const bar: Data = {
criticalColor: '#2' // ok, there is a limitation in TS
}
const baz: Data = {
criticalColorAlpha: (opacity: number) => `rgba(1, 1, 1, ${opacity})` // ok
}
const baz2: Data = {
criticalColorAlpha: (opacity: number) => `rgba(1, 1, 1, x)` // expected error
}
我注意到,如果這是一種方法,則使用Alpha
后綴;如果是 HEX 顏色,則使用Color
或Text
。 這就是為什么我決定為Data
接口使用兩個不同的鍵。
您可以為RGBA
使用 stonger 類型,但有一個限制。 請看我的文章和這個答案。
關於 HEX colors 的相同故事。請參閱本文。
請提供所有場景或限制,我會盡力為您提供最安全的類型。
謝謝
更新您在評論中使用的語法:
[key in AdditionalKeysHex]:`#${string}`|string[];
是錯的。 您只能在映射類型中使用in
運算符。 為了實現所需的行為,我認為應該拆分Data
接口。
請查看DataResult
類型:
type RGBA = `rgba(${number}, ${number}, ${number}, ${number})`
type Alpha = (opacity: number) => RGBA
type KeysHex = `${string}Color` | `${string}Text` | `${string}Icon` | `${string}Background`;
const arr = ['white', 'darkGrayBlue', 'secondDarkGrayBlue', 'thirdDarkGrayBlue', 'darkDullBlue', 'secondDarkDullBlue', 'lightGrayBlue', 'secondLightGrayBlue', 'thirdLightGrayBlue', 'fourthLightGrayBlue', 'fifthLighGrayBlue', 'lightGrayNavy', 'paleNavy', 'brightBlue']
type AdditionalKeysHex = 'white' | 'darkGrayBlue' | 'secondDarkGrayBlue' | 'thirdDarkGrayBlue' | 'darkDullBlue' | 'secondDarkDullBlue' | 'lightGrayBlue' | 'secondLightGrayBlue' | 'thirdLightGrayBlue' | 'fourthLightGrayBlue' | 'fifthLighGrayBlue' | 'lightGrayNavy' | 'paleNavy' | 'brightBlue';
interface IWelcome {
[color: KeysHex]: `#${string}` | string[];
[alpha: `${string}Alpha`]: Alpha;
}
type WithKey = {
[key in AdditionalKeysHex]: `#${string}` | string[];
}
interface Data {
[color: KeysHex]: `#${string}` | string[];
[alpha: `${string}Alpha`]: Alpha;
welcome: IWelcome;
}
type DataResult = WithKey & Data
const Palette: DataResult = {
primaryText: "#58585B",
secondaryText: "#39393B",
secondaryIcon: "#C8D1E8",
tertiaryText: "#8F8E94",
smallWidgetBackground: ["rgba(255,255,255,0.15)", "rgba(255,255,255,0)"],
grayColorAlpha: (opacity: number) => `rgba(200, 209, 232, ${opacity})`,
primaryTextAlpha: (opacity: number = 1) => `rgba(255, 255, 255, ${opacity})`,
welcome: {
primaryText: "#fff",
primaryTextAlpha: (opacity: number = 1) => `rgba(255, 255, 255, ${opacity})`,
secondaryText: "#C8D1E8",
loaderColor: "#fff",
},
white: '#FFFFFF',
darkGrayBlue: '#363C52',
};
您可以刪除特定的鍵:
export type AlphaColorProcessing = (opacity: number) => string;
export interface Styles {
[key: string]: string | AlphaColorProcessing;
}
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