Answers for "Javascript Event Loop"

1

Javascript Event Loop

const first = () => console.log('Hi,i am first');
const second = () => console.log('Hi,i am second');
const third = () => console.log('Hi,i am third');
const fourth = () => {
    first();
    setTimeout(second, 4000);
    //store in queue & it will execute after 4 seconds
    setTimeout(third, 2000);
    //store in queue & it will execute after 2 seconds
    console.log('Hi,i am fourth');
};
fourth();

//Expected output:
/*Hi,i am first
  Hi,i am fourth
  Hi,i am third
  Hi,i am second 
*/
Posted by: Guest on September-07-2021
5

event loop in javascript

The Event Loop has one simple job — to monitor the Call Stack 
and the Callback Queue. If the Call Stack is empty, it will 
take the first event from the queue and will push it to the 
Call Stack, which effectively runs it. Such an iteration is 
called a tick in the Event Loop. Each event is just a function 
callback.

#bpn
Posted by: Guest on February-19-2021
0

javascript event loop

function task(message) {
    // emulate time consuming task
    let n = 10000000000;
    while (n > 0){
        n--;
    }
    console.log(message);
}

console.log('Start script...');
task('Download a file.');
console.log('Done!');
Code language: JavaScript (javascript)
Posted by: Guest on April-30-2021

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