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5 Lesser-Known Asynchronous Patterns in Node.js (With Examples)
Async Iterator/Generator Pattern When fetching paginated data from an API, an Async Generator can fetch each page lazily, allowing better control over memory and network usage. async function* fetchPaginatedData(totalPages) { for (let page = 1; page setTimeout(resolve, 1000)); // Simulating delay yield `Data from page ${page}`; } } (async () => { for await (const data of fetchPaginatedData(3)) { console.log(data); // Logs each page's data with a delay } })(); Event Loop - Execution Order The Event Loop in Node.js ensures non-blocking behavior in a single-threaded environment by handling tasks in phases. Understanding the order of execution helps you predict behavior. console.log("Start"); setImmediate(() => console.log("
Async Iterator/Generator Pattern
When fetching paginated data from an API, an Async Generator can fetch each page lazily, allowing better control over memory and network usage.
async function* fetchPaginatedData(totalPages) {
for (let page = 1; page <= totalPages; page++) {
await new Promise(resolve => setTimeout(resolve, 1000)); // Simulating delay
yield `Data from page ${page}`;
}
}
(async () => {
for await (const data of fetchPaginatedData(3)) {
console.log(data); // Logs each page's data with a delay
}
})();
Event Loop - Execution Order
The Event Loop in Node.js ensures non-blocking behavior in a single-threaded environment by handling tasks in phases. Understanding the order of execution helps you predict behavior.
console.log("Start");
setImmediate(() => console.log(" 
