Sergei
7feca4d54b
Implemented a reusable useDebounce hook to prevent rapid-fire clicks on refresh buttons throughout the application. Changes: - Created hooks/useDebounce.ts with configurable delay and leading/trailing edge options - Added comprehensive unit tests in hooks/__tests__/useDebounce.test.ts - Applied debouncing to dashboard WebView refresh button (app/(tabs)/dashboard.tsx) - Applied debouncing to beneficiary detail pull-to-refresh (app/(tabs)/beneficiaries/[id]/index.tsx) - Applied debouncing to equipment screen refresh (app/(tabs)/beneficiaries/[id]/equipment.tsx) - Applied debouncing to all error retry buttons (components/ui/ErrorMessage.tsx) - Fixed jest.setup.js to properly mock React Native modules - Added implementation documentation in docs/DEBOUNCE_IMPLEMENTATION.md Technical details: - Default 1-second debounce delay - Leading edge execution (immediate first call, then debounce) - Type-safe with TypeScript generics - Automatic cleanup on component unmount 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
70 lines
1.9 KiB
TypeScript
70 lines
1.9 KiB
TypeScript
import { useRef, useCallback } from 'react';
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interface DebounceOptions {
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delay?: number;
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leading?: boolean;
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}
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/**
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* Hook for debouncing function calls
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* @param callback Function to debounce
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* @param options Configuration options
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* @param options.delay Debounce delay in milliseconds (default: 1000ms)
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* @param options.leading If true, invoke on leading edge instead of trailing (default: true)
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* @returns Debounced function and isDebouncing state getter
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*/
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export function useDebounce<T extends (...args: any[]) => any>(
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callback: T,
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options: DebounceOptions = {}
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): {
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debouncedFn: (...args: Parameters<T>) => void;
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isDebouncing: () => boolean;
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cancel: () => void;
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} {
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const { delay = 1000, leading = true } = options;
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const timeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
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const lastCallTimeRef = useRef<number>(0);
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const cancel = useCallback(() => {
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if (timeoutRef.current) {
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clearTimeout(timeoutRef.current);
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timeoutRef.current = null;
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}
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}, []);
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const isDebouncing = useCallback(() => {
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const now = Date.now();
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return now - lastCallTimeRef.current < delay;
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}, [delay]);
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const debouncedFn = useCallback(
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(...args: Parameters<T>) => {
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const now = Date.now();
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const timeSinceLastCall = now - lastCallTimeRef.current;
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// If leading edge and enough time has passed, execute immediately
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if (leading && timeSinceLastCall >= delay) {
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lastCallTimeRef.current = now;
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callback(...args);
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return;
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}
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// If already debouncing on leading edge, ignore
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if (leading && timeSinceLastCall < delay) {
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return;
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}
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// Trailing edge behavior
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cancel();
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timeoutRef.current = setTimeout(() => {
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lastCallTimeRef.current = Date.now();
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callback(...args);
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timeoutRef.current = null;
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}, delay);
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},
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[callback, delay, leading, cancel]
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);
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return { debouncedFn, isDebouncing, cancel };
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}
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