Javascript event loop
Javascript
1. Single threaded
2. Non-blocking
3. Asynchronous concurrent language
How does Javascript works ?
1. Javascript Engine
2. Event loop
3. Callback queue
4. Web APIs
Visualisation of callstack
function f1(a){
return 21 * a;
}
function f2(){
return f1(2);
}
function print(){
const res = f2();
console.log('res: ', res)
}
print();
const x_res = syncReq('x.com')
const y_res = syncReq('y.com')
const z_res = syncReq('z.com')
console.log(x_res);
console.log(y_res);
console.log(z_res);
How to prevent this situation ?
Asynchronous callback
console.log('Hi');
setTimeout(function() {
console.log('there');
}, 5000)
console.log('Gndg meetup');
Thanks
email : sumanshweta44@gmail.com
event loop
By shweta suman
