Here's a function I have:
const getQueryParams = (names) => {
const urlParams = new URLSearchParams(window.location.search)
return names.reduce((acc, curr) => {
return {
...acc,
[curr]: urlParams.get(curr),
}
}, {})
}
I want to define TypeScript types to achieve the following type for the output of the above function.
const params: Record<'a'|'b', string> = getQueryParams(['a', 'b'])
Can this be done? If so, how can it be accomplished?
This code snippet appears to be functioning correctly.
type ExtractQueryParams = <U extends string>(args: U[]) => Record<U, string | null>
export const extractQueryParams: ExtractQueryParams = params => {
const queryParameters = new URLSearchParams(window.location.search)
return params.reduce((result, current) => {
return {
...result,
[current]: queryParameters.get(current),
}
}, {} as ReturnType<ExtractQueryParams>)
}
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