Throttle Function
Limits function execution frequency to specified interval, perfect for scroll/resize events and button clicks
The working developer's field notes
Useful code.
Explained properly.
A focused library of JavaScript and TypeScript patterns for the details you solve repeatedly—arrays, browser APIs, async flows, validation, and performance.
FIELD NOTE · 010•••
function debounce(fn, delay) {
let timer;
return (...args) => {
clearTimeout(timer);
timer = setTimeout(
() => fn(...args), delay
);
};
}
Why it matters
Read the complete pattern →Wait until a burst of input settles before running expensive work.
30documented patterns
4practical categories
100%open-access reference
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Patterns worth keeping close
Selected for broad usefulness, readable implementations, and the kinds of edge cases that show up in production.
10TypeScript
Debounce Function
Delays function execution until after specified idle time, ideal for search input, autocomplete, and form validation
Open field note →11TypeScript
Async/Await Error Handler
Simplifies async/await error handling without try/catch blocks, returns [error, result] tuple
Open field note →30TypeScript
Generic Memoization Function
Caches function results based on arguments to avoid redundant computations
Open field note →Reference library
Find the pattern you need
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Debounce Function
Delays function execution until after specified idle time, ideal for search input, autocomplete, and form validation
Async/Await Error Handler
Simplifies async/await error handling without try/catch blocks, returns [error, result] tuple
Local Storage with Expiry
Enhanced localStorage with automatic expiry, supports TTL (Time-To-Live) for stored items
Optimized Scroll Event Handling
Combines debounce with requestAnimationFrame for high-performance scroll event handling
Throttle API Requests
Prevents excessive API calls by throttling requests to specified rate limit
Generic Memoization Function
Caches function results based on arguments to avoid redundant computations