20.9K
PRincoming hate from the JavaScript devs lol
#tech #ai #computerscience #programming #code
@programmergrind
#Loop Software
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27Trending Reels
(12)
178
FUJavaScript's secret execution order revealed! 😱 Sync → Microtasks → Macrotasks. Save this for your next interview!
#JavaScript #Programming #CodingInterview
@fullstackflow03
608
THHow To Create A Frequency Map - JavaScript
Walk through of how to create a frequency map in javascript, useful for coding interviews at companies like Microsoft, Amazon, Apple and Google
#softwareengineering #javascript #codinginterview
@thom.code
23
FUThe Event Loop is JavaScript's SUPERPOWER! 🔥
Single-threaded but handles multiple tasks at once? 🤯
How? Event Loop + Call Stack + Callback Queue
This is why JS stays non-blocking and your UI doesn't freeze!
#javascript #eventloop #async #programming #webdevelopment #coding #webdev #asyncawait #promises #frontenddeveloper
@fullstackflow03
24
FUsetTimeout with 0ms delay... but it runs LAST? 🤯
Watch how the Event Loop actually works 👇
Even with zero milliseconds, callbacks wait in the queue until the Call Stack is completely empty.
This is why async doesn't mean immediate! ⏰
#JavaScript #WebDev #Coding
@fullstackflow03
252
NB👉🏼 Hoisting caught me here…
.
.
.
#codingskills #javascripttips #learncoding #hoisting #softwareengineer
@nb.codes
4.9K
THInterviewer: “What is the event loop?”
The event loop is what lets JavaScript handle asynchronous work without running multiple threads.
JavaScript itself runs on a single call stack.
Only one thing can execute at a time.
When something async happens - like a timer, a network request, or a promise - JavaScript doesn’t run it in parallel.
That work is scheduled to run later, once the current stack has finished.
The event loop is the mechanism that:
- waits for the call stack to be empty
- takes the next piece of scheduled work
- and pushes it onto the stack to run
This is why async code can feel concurrent even though execution is still single-threaded.
In interviews, a strong explanation sounds like this:
“JavaScript runs one thing at a time.
Async work is scheduled, and the event loop decides when that work runs.”
That clarity matters more than naming queues or phases.
@thetechinterview
786
_SJavaScript Event Loop
This lesson explains how the event loop manages execution order, why synchronous code runs first, and how microtasks are prioritized over task queue callbacks.
Follow for more web dev tips & tech explainers!
#script_ish #JavaScript #JS #EventLoop #Async #Microtasks #setTimeout #shortsfeed #TechTok #frontend #webdesign #webdevelopment #Programming #FrontendDevelopment #TechTutorial #JavaScriptTips #WebDevCommunity #JavaScriptForBeginners
@_script_ish
151.0K
THA strong answer doesn’t stop at “yes”.
JavaScript runs one thing at a time.
Only one piece of JavaScript can execute at any given moment.
What often confuses people is async code.
Async doesn’t change how JavaScript runs.
It changes when work is allowed to run.
Network requests, timers, and promises don’t execute in parallel with your code.
They complete elsewhere, then wait to be scheduled back onto the main thread.
That scheduling is handled by the event loop.
A good way to explain it in an interview is:
“JavaScript is single-threaded.
Async work is scheduled, and the event loop decides when that work can run, and in what order.”
When interviewers ask this, they’re not testing the definition.
They’re testing whether you understand execution order.
That’s what makes the difference between a weak and a strong answer.
@thetechinterview
180
TRJavascript most asked interview questions 🐦🔥✨
#javascript #reactjs #trending #html #programming
@trashcan_treasuress
4.4K
WEUnderstanding the JavaScript Event Loop is a game changer for writing efficient asynchronous code.
Many developers use setTimeout and Promise daily —
but fewer truly understand what happens behind the scenes.
Here’s a quick breakdown 👇
🔹 JavaScript is single-threaded
🔹 Synchronous code runs first (Call Stack)
🔹 Then all Microtasks execute (Promises, queueMicrotask)
🔹 Then one Macrotask runs (setTimeout, setInterval, DOM events)
🔹 The loop repeats
📌 Execution Priority:
Synchronous → Microtasks → Macrotasks
Example:
console.log(1);
setTimeout(() => console.log(2), 0);
Promise.resolve().then(() => console.log(3));
console.log(4);
✅ Output:
1 → 4 → 3 → 2
Understanding this helps in:
✔️ Debugging async issues
✔️ Optimizing performance
✔️ Writing better React applications
✔️ Cracking frontend interviews
I’ve created a simple infographic to visually explain the entire Event Loop process.
If you're preparing for JavaScript or React interviews, mastering this concept is essential.
💬 Now Your Turn 👇
What will be the output of this code?
console.log("A");
setTimeout(() => console.log("B"), 0);
Promise.resolve().then(() => {
console.log("C");
});
console.log("D");
👨💻 Follow for daily React, and JavaScript
👉 @webuniverse02
Drop your answer in the comments 👇
Let’s see who really understands the Event Loop 🔥
#JavaScript #FrontendDevelopment #ReactJS
#WebDevelopment #EventLoop CodingInterview
@webuniverse02
146
FUBenchmark your JavaScript code in 2 lines with console.time() ⏱️ Stop guessing which approach is faster — measure it! Perfect for performance optimization.
#javascript #coding #performance #webdevelopment #programming #javascripttutorial #codinglife #softwareengineering #developer #optimization
@fullstackflow03
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