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import { callAll } from "./utils"
interface Props {
[key: string]: any
}
const clsx = (...args: (string | undefined)[]) =>
args
.map((str) => str?.trim?.())
.filter(Boolean)
.join(" ")
type TupleTypes<T extends any[]> = T[number]
type UnionToIntersection<U> = (U extends any ? (k: U) => void : never) extends (
k: infer I,
) => void
? I
: never
const eventRegex = /^on[A-Z]/
export function mergeProps<T extends Props>(
...args: T[]
): UnionToIntersection<TupleTypes<T[]>> {
let result: Props = {}
for (let props of args) {
for (let key in result) {
if (
eventRegex.test(key) &&
typeof result[key] === "function" &&
typeof props[key] === "function"
) {
result[key] = callAll(result[key], props[key])
continue
}
if (key === "className" || key === "class") {
result[key] = clsx(result[key], props[key])
continue
}
if (key === "style") {
result[key] = Object.assign({}, result[key] ?? {}, props[key] ?? {})
continue
}
result[key] = props[key] !== undefined ? props[key] : result[key]
}
// Add props from b that are not in a
for (let key in props) {
if (result[key] === undefined) {
result[key] = props[key]
}
}
}
return result as any
}
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