All Questions
Tagged with callstack javascript
198 questions
0
votes
1
answer
50
views
callback queue , call stack and registered event like setTimeout
what happens if any event is register (like setTimeout) but it takes more time (assume 5,6 min ), and currently call stack and callback queue is completed all task and it is empty, so the program is ...
- 11
-1
votes
1
answer
52
views
Problem with Execution order i would guess
im loosing my mind! I try to get data from a form and pass it to a php script that puts the data in a csv file and into a database. This Works, however i am trying to validate the Transmission of the ...
- 31
4
votes
1
answer
808
views
How does Wasm code run in browsers and how does it interact with JavaScript
I'm curious about how WebAssembly (Wasm) code operates in the browser. I understand that JavaScript code in the browser is executed by the JavaScript engine, but I'm unsure about who executes the Wasm ...
- 41
0
votes
1
answer
131
views
Does JavaScript have an Event table?
I read an article on Medium that said that "JavaScript has an event table that keeps tracks of all the events that will be executed asynchronously maybe after some time interval or after the ...
- 45
0
votes
1
answer
52
views
Why don't I see task queue bunch up?
I am reading and conversing with chatGPT about what exactly setTimeout and setInterval do. As I understand it the main JavaScript execution thread sends the Web Timer API a callback function and an ...
- 37
1
vote
0
answers
89
views
Order of processing microtasks in JavaScript [duplicate]
I’m solving an event loop problem in Javascript and I can’t figure out why the output order is 2, 1, and not 1, 2.
f1();
Promise.resolve().then(() => {
console.log(2);
});
async function f2() {
...
- 11
1
vote
1
answer
78
views
why setImmediate function executes after setTimeout
setImmediate(() => {
console.log("set immediate function calling")
})
setTimeout(() => {
console.log("setTime out function")
}, 1000)
for (let i = 0; i <= ...
- 39
0
votes
3
answers
251
views
Javascript maximum call stack size even though recursive function call itself with an accumulator
I have an object whose value can be any type.
const data = {
a: { aa: 50, ab: 'hello', ac: 'xx_1' },
b: 50,
c: [
{ ca: 100, cb: 'by', cc: 'xx_2' },
{ ca: 101, cb: 'by1', cc: '...
- 83
1
vote
1
answer
94
views
Why does console.trace() show a growing stack trace when using event listeners with { once: true } option?
I have this inline js code.
let btn = document.querySelector("button");
btn.addEventListener("click", foo, { once: true });
function foo() {
btn.addEventListener("click", bar, { once: true });
...
- 108
1
vote
0
answers
481
views
Uncaught RangeError: Maximum call stack size exceeded (functionjs.js)
I'm trying to build a recruitment management website (nodejs), but when I'm almost done I get this error:
Uncaught RangeError: Maximum call stack size exceeded. functionjs.js
Here is my functionjs.js ...
- 19
0
votes
1
answer
161
views
Random placement of items on canvas without overlap
I'm trying to randomly place a number of items (sprites) onto a canvas element without any overlap. I'm using a seeded random number so that I can get consistent placement. However I'm running into a ...
- 9,606
-1
votes
1
answer
88
views
how to make a syncrounous function like writefilesync not using callbacks, nor promises
first of all let me say i'm not asking anything about async/await or promises, i know these concepets, a also know that i can use top-level awaits
but
i want to make "a single function" to ...
0
votes
0
answers
164
views
Can somebody explain how this code is executed in relation to the call stack and the event loop?
I have created this snippet which I am trying to figure out how it's working the way it's working.
function fetch() {
console.log("Fetch start");
return new Promise(resolve => {
...
- 51
1
vote
1
answer
49
views
If Array.prototype.map is not in the call stack, how exactly JavaScript knows to not run any other code before its iteration is over?
function callback(x) {
// also tried debugger to find .map in the call stack
console.trace();
return 2*x;
}
[1,2,3].map(callback);
console.log('Next line of code');
console
What I know about ...
3
votes
1
answer
611
views
Does the both functions parent and asynchronous child get re-pushed to call stack from task queue on completion of async code of child function?
What i all know about call stack is:
If there is only one function being called it will be pushed to call stack and removed when its job is done or otherwise return statement is encountered.
If one ...
- 43
0
votes
1
answer
503
views
RangeError: Maximum Call Stack Size Exceeded in JS when generating 24 Random Numbers [duplicate]
I am working on a project in JavaScript where I must generate 24 random and different numbers from 1-24. Whenever I run this code, I get this error in Safari, Firefox, and Chrome RangeError: Maximum ...
0
votes
0
answers
27
views
How do I find the number-palindrome if a large number causes the size exceeded collstack to overflow?
I try to find a palindrome number, but if the number I pass is too big, then the call stack overflows.
How can this be fixed so that the function can return larger numbers?
(function () {
...
- 1
1
vote
1
answer
127
views
Why doesn't the Event Loop retrieve from the Callback Queue when the Call Stack is empty?
I am aware that the Event Loop takes the first callback from the Callback Queue when the Call Stack is empty.
With this premise, why does the below code execute sync2() before the setTimeouts' ...
- 1,907
0
votes
0
answers
36
views
Recursion Error: Maximum call stack size exceeded for checking if a negative number exists in an array
I have a recursion methods to check if a generated random number exists in the idNum array. My code is below. I'm getting a RangeError: Maximum call stack size exceeded error in the recursion and not ...
- 427
0
votes
0
answers
23
views
Run time-consuming function with Promises without blocking runtime [duplicate]
I'm trying to understand how to use time consuming function with Promises. I have some nonsense, but time consuming function computation() (that I create for demonstration purpose), that would need 3-...
2
votes
3
answers
441
views
when is the call stack really empty?
https://promisesaplus.com/#point-34
onFulfilled or onRejected must not be called until the execution
context stack contains only platform code.
Promises (then(), catch(), finally()) and async ...
user19481364
0
votes
1
answer
1k
views
LibUV NodeJS handle synchronous or asynchronous tasks?
I'm Nodejs beginner. I have been reading some documents and posts on Google and as far as I know, LibUV is used to handle asynchronous tasks. However, when I came across a post recently, the author ...
- 136
0
votes
0
answers
48
views
Why don't anonymous functions change context - Does it have to do with the call stack? [duplicate]
This code keeps the context in window:
const a = function () {
console.log(this);} //window
And this code changes the context to a2:
const a3 = {
anyFunction: () => { console.log(this) } // ...
- 199
0
votes
0
answers
96
views
In Javascript, is it possible to communicate to workers while inside while-loop?
I have a recursive calculation, which I handle using a manual call stack.
var stack = initialListOfTasks();
while (stack.length > 0) {
var todo = stack.shift();
performTask(stack, todo);
}...
0
votes
1
answer
36
views
JavaScript - result undefined - forcing one method to complete before another?
I have the following NodeJS code running in an AWS Lambda:
const https = require('https');
exports.handler = async event => {
try {
const currentWeekNumber = getWeekNumber(new Date(Date....
- 1,591
0
votes
2
answers
2k
views
What is the difference between call stack and task queue in javaScript(event-loop)?
I am confuse in differentiating between call stack and task queue in the context of event loop.
Call stack -->Every time a script or function calls a function, it's added to the top of the call ...
- 13
3
votes
3
answers
813
views
Do eventlisteners callback functions go into callback queue?
I think depending on my understand that callback functions are placed in the callback queue and don't execute until callstack is empty, so in the following code, why does the callback function of the ...
- 124
0
votes
1
answer
68
views
How to get call stack in VSC debugger? console.trace() is undefined
If I'm paused in the VSC debugger I can't get the call stack with console.trace().
- 2,933
0
votes
2
answers
66
views
How can I prevent a RangeError while running an algorithm that finds all permutations of a given word?
I've built a thesaurus-application in React that fetches data from a web-dictionary API and renders definitions, synonyms, and antonyms as collapsible lists when a user searches a word. I'd like to ...
- 95
-1
votes
1
answer
83
views
How do I prevent an infinite call stack from occurring when generating a large binary grid?
I'm working on a web-app implementation of Binary Sudoku that recursively generates random, solved boards, after which it reduces the amount of tiles on the grid down to a valid starting point for ...
- 95
0
votes
2
answers
170
views
quickSort javaScript throwing Maximum call stack size exceeded
why is this function throwing error
I am trying to sort array using quickSort with a recursion approach
here I am using the last element in the array as a pivot
let array = [1,0,123,1,3,12,2,45,6]
...
-1
votes
1
answer
75
views
why my async code is not executing inspite of being the free call stack
As per my knowledge async code is executed when the call stack is empty and execution of the async code is finished in web API
But In a given code why my async code which is setTimeout function and ...
0
votes
1
answer
2k
views
Is async in javascript concurrent or parallel?
JavaScript code runs on a single thread, in event loop when method push to web apis return callback function to queue, listener queue and callstack is empty push callback function execute it in ...
1
vote
2
answers
535
views
How does JS know where to continue in the Call Stack?
I'm trying to understand how the Call Stack works after each function is popped.
For example:
function inner() {
console.log("what happens after inner() is popped from Call Stack?");
}
...
- 21
0
votes
2
answers
27k
views
I am getting RangeError: Maximum call stack size exceeded error in Javascript
I am trying to solve a problem of leetcode through recursion but I am getting an error saying RangeError: Maximum call stack size exceeded maybe I am doing something wrong.
Problem:
Write an algorithm ...
- 968
0
votes
1
answer
1k
views
Maximum call stack size exceeded for large iterators
I'm trying to convert an iterator to an array. The iterator is the result of calling matchAll on a very long string. The iterator (I assume) has many matches within the string. First I tried it with ...
- 1,531
0
votes
2
answers
205
views
Where will this callback function be registered in Node.js and how does it behave?
const add = (n1, n2, callback) => {
setTimeout(() => {
const sum = n1 + n2
callback(sum)
},2000)}
add(1, 4, (sum) => {
console.log(sum) // Should print: 5
})
I ...
- 61
1
vote
2
answers
156
views
how to avoid recursion or to fix the problem?
Teaching JS trying to do a ticatactoe game and got a problem with recursion, specifically with 'Maximum call stack size exceeded'.
When I try to make a random move by the computer player I make a ...
- 31
0
votes
0
answers
162
views
Merge Sort question: Maximum call stack exceeded, avoided infinite recursion
Unable to get a terminal output because of error:
Uncaught RangeError: Maximum call stack size exceeded.
Tried to look at similar questions on stackoverflow,
like this Maximum call stack size exceeded ...
- 31
1
vote
0
answers
323
views
Max call stack is greater in while loop
all.
Would be grateful if someone could clarify the following.
We have a basic factorial function and a for loop with a try catch block which runs the function until error
"Maximum call stack ...
- 106
1
vote
1
answer
80
views
Javascript - How to execute a function on a given time ? (with variable time periods)
I have to make a request to the backend server to retrieve some data, and inside the response comes the hour of the day that I have to make the request again. For example: I make the request at 12:00 ...
- 99
0
votes
0
answers
952
views
Maximum call stack size exceeded due to recursive function
I'm trying to populate data from an array through a recursive function, and this function would get called upon each time the data or search value is updated. I understand that to avoid call stack ...
- 39
1
vote
0
answers
446
views
Why are primitives types stored in call stack instead of the heap?
My understanding is that call stack is supposed to keep track of which codes are getting executed, and memory heap is where the data is stored. However, I recently discovered that call stack also ...
- 105
0
votes
0
answers
244
views
JavaScript: What is the data structure for the call stack?
I'm writing an article about JS concurrency model and event loop. I've read many (even internally) conflicting articles regarding the data structures of the call stack and Execution Contexts.
A ...
- 1,190
4
votes
3
answers
281
views
Why are function expressions not included in the variable object of the Execution Context?
While going through the Execution Context part of the JavaScript.The Core. (1st ed.) by Dmitry Soshnikov, I came across this line that explicitly says that function expressions are not included in the ...
- 936
6
votes
2
answers
2k
views
Callback function executing in the call stack even when it's not empty
When the click event is fired from the mouse, it behaves as expected:
First the listener 1 is pushed into the stack where it queues promise 1 in Microtask Queue(or Job Queue). When listener 1 is ...
- 73
0
votes
0
answers
345
views
get the function caller in javascript
I have a function createStuff which gets called when the html body is loaded
inside the function is a event listener btn.addEventListener("click", notes);
which calls the notes function
...
- 281
1
vote
1
answer
424
views
Recursion in JavaScript question- how is the position of console.log here affecting the order in which values are returned?
I'm fairly new to programming and I'm learning about basic recursion for the first time. A result I just got playing around with a practice question in JavaScript is really baking my
noodle.
function ...
- 55
0
votes
2
answers
3k
views
why setInterval inside useEffect hook in React keeps running?
I have this React component
import React, {useEffect, useRef, useState} from 'react';
export default function MyD3(props) {
const [count, setCount] = useState(0);
useEffect(() => {
...
- 103
0
votes
1
answer
237
views
Is some wrong with this call stack in this react component?
I was trying to make a stopwatch counter however when I call the "startTimer" function, the setInterval function is fired before the setStartTime (is fired after I click the start button for ...
- 33