26 lines
648 B
TypeScript
26 lines
648 B
TypeScript
import type { Timeout } from "@/types/evcc";
|
|
|
|
/**
|
|
* Creates a debounced version of `fn` that calls at the leading edge.
|
|
* The debounced function does not return the result of `fn`, even if `fn` is async.
|
|
*/
|
|
export function debounceLeading<T extends (...args: any[]) => any>(
|
|
fn: T,
|
|
delay: number
|
|
): (...args: Parameters<T>) => void {
|
|
let timer: Timeout;
|
|
return (...args: Parameters<T>) => {
|
|
if (!timer) {
|
|
fn(...args);
|
|
timer = setTimeout(() => {
|
|
timer = null;
|
|
}, delay);
|
|
return;
|
|
}
|
|
clearTimeout(timer);
|
|
timer = setTimeout(() => {
|
|
timer = null;
|
|
fn(...args);
|
|
}, delay);
|
|
};
|
|
}
|