Everything about Callback Function in Advanced JavaScript in Hindi 2020

Welcome, CallBack Function Explained with Practical in Advanced JavaScript in Hindi. A callback is a function that is to be executed after another function has finished executing — hence the name ‘call back’.

Any function that is passed as an argument is called a callback function.

Why do we need Callbacks?

For one very important reason — JavaScript is an event-driven language. This means that instead of waiting for a response before moving on, JavaScript will keep executing while listening for other events.

Callbacks are a way to make sure a certain code doesn’t execute until another code has already finished execution.

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[codingsteps]

This way of explanation is very simple and align to the real scenario that helps us to understand properly.

[rehmatdesigns]

jab kahi bhi kuch na samj aye to thapa bhai ka samjaya samj m a hi jaata hai ☺

[yesireact]

waiting for data structures and algo with javascript

[techiq]

Callback function ke itne videos dekhe but samjh nehi aya .. But apka video dekhle ekdam clear ho geya 100% ... Thank you sir❤❤

[gmkhussain]

function callBackFunc( callback ) {
callback();
}


Function which are passed as a argument to other function and can be called callback function.



#Great

[indranathbanerjee]

Coding sikhne ka best channel hai THAPA TECHNICAL❤️❤️

[farookahmed]

Thapa Rocks... I have seen so many videos but I got it after watching your videos. your first phone example is awesome. make your content in English your content is cool.

[muskanramchandani]

Your way of explaining is very simple .

[ravish]

Thank you bhai. Bhot video dekh lia but samaj to apki video me hi aya callback ka jhol🙏

[DEEPANSHU_NAG]

Awesome bhai 👍🏻
Congrats for 💯 k subscribers🎉🎊

[kamleshpawar]

hello sir,
I request you to explain the callback function with timer example mentioned at the beginning of the video. second example me calback use kar ke kuch achive nahi hua.

[nikhilpatil]

I really like the way you explain things, you help me with my whole journey while I was learning web development. I will be very appreciative if I do something for you.

[CHIKUTOONSKannada]

I got my doubt cleared only after your tutorial thank you technical bhai

[odysseusantonios]

Bro you are great, jio bhai 100 saal jio ek video me problem solve kar di yaar kaha the tum ab tak

[ranaashutoshashokjadhav]

const per1=(friend, callfrnd)=>
{
am busy right now i am talking to ${friend}
`)}, 3000);
callfrnd();
}

const per2=()=>{
console.log("this is second function");
}
per1("shivam", per2);

is me call back function ne kam kyu nahi kiya, isme pehle per2() function ka output show ho rha hai, 3 sec baad me per1() function ka output aa rha hai, but according to callback function, pehle per1() and baad me per2() execute hona chahiye na ? comment if anyone can explain
this

[disneychannelstars]

I have a doubt ..you have not defined callfrnd function where is the definition of the function?

[mdfarhan]

thank you bhae itne acche se explain karne ke liye

[entitleop]

best explaination of call back functn ever

[vaibhavtyagi]

i was strugling with callback fun. but now i am like # ye callback fun. hai .... thnku bhai

😂😂

[cool_guy_Vaibhav]

Your video really cleared my doubt, thanks