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mkczarkowski/satisfies-promise.ts

Created October 3, 2022 18:51
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satisfies-promise.ts
type Colors = "red" | "green" | "blue";
type HSL = [hue: number, saturation: string, lightness: string];
type ColorPalette = Record<Colors, string | HSL>
const palette = (): Promise<ColorPalette> => new Promise((resolve, reject) => {
resolve({
red: [0, '100%', '50%'],
green: "#00ff00",
blue: [240, '100%', '50%']
})
});
const justAPalette = await palette() satisfies ColorPalette;
const blueHslCssFunction = `hsl(${justAPalette.blue.join('')})` // Property 'join' does not exist on type 'string | HSL'.
// Property 'join' does not exist on type 'string'.ts(2339)
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