Event Bubbling, Capturing and Propagation in JavaScript ? Frontend Interview Series 🔥 Episode 10

When working with events in JavaScript you have the option of using 'bubbling' or 'capturing' to define the order in which the event handlers fire off. In most cases, bubbling is default.

Typically you don't need to worry about capturing unless you need ultimate control over your event handlers. This concept is only relevant if you have a parent element and a child element which both have event listeners.

When using 'bubbling', events are fired off beginning with the child element and then go up to the parent.

In contrast, 'capturing' means that events are fired off from the parent first, and then down to the child element.

In this video I show you a simple example of how these two options differ along with Stop Propagation , Immediate Propagation & Prevent Default .

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[TechnicalSuneja]

00:00 - Don't skip anything 🙏
Aur kya haal sabke?
btao next topic JS kon sa hona chahiye ??

[bgmieditscy]

first of all thank you so much suneja sir, i tried different different courses on udemy like js zero to expert and youtube code with harry and yahoo baba decode, was learning from almost an year, however recently i was juggling to get an offline tution for advance es6, after watching this video i am confident enough that i will be able to achieve enough js knowledge to build good projects. i will once again say thank you from all struggling students like me for your efforts and hardwork.

[antiprocastinator]

Thanks, brother for the simple and effective explanations of Propagation in JavaScript. Lots of love!
I have kept a note on both the concepts here for other devs out there.
Note:

Propagation in JavaScript: - In JavaScript, event propagation refers to the mechanism by which events are handled and propagated through the DOM hierarchy. There are two phases of event propagation: the capturing phase and the bubbling phase.


Event Bubbling: - This occurs when an event is first captured by the innermost element and then propagates outward to its parent elements, all the way up to the document root. It starts from the target element and moves up the DOM hierarchy to the document root. This behaviour is similar to bubbles rising in water, hence the name "bubbling.

Event Capturing: - This occurs when an event is first captured by the outermost element and then propagates inward to the target element. It starts from the document root and moves down the DOM hierarchy to the target element. This is often less intuitive than event bubbling but can be useful in certain situations.

So, in summary:

Event Bubbling goes from child to parent (inner to outer).
Event Capturing goes from parent to child (outer to inner).

[funterban]

it's very common and basic problem to understand but you did clarify everything smoothly

[manishtomar]

thankyou sir for creating short can concise video, i have been following you since my first year of my btech currently pass out but still your shorts and videos are helpful to me

[rashmisomani]

Randomly found this video series.. after watching this, many concepts of js have cleared.

[Yadavpy]

Randomly found this channel. I can say best channel for js concepts

[shivajipatil]

90% questions ye series me se hi atte hai js me ... thanks for this series

[manishtomar]

I like your reels easily aur jldi se concept smjh aajata hai

[ronakkela]

my all javascript concepts is cleared bcos of you, u Deserve Respect.

[mohammadfaizanmateen]

Thanks for the explanation I always come to this particular video when I forget this topic. Very well explained 👍

[zahirali]

Love from pakistan sir, i know the the topics before and but i did not know that how to stop the propagtion and capturing. and also i learn what is actually the preventDefault(). love and good wishes sir.

[ransumankatara]

19 kb khtm huye pta bhi nhi chala. This is called teaching❤

[akshitsangwan_]

The best explanation on the topic I have got by far!

[starman]

Thanks Suneja for the content, it is brilliant, subscribed!

[ShubhamKumar-clc]

finally you cleared all my doubt. thanku.

[shresth]

Thank you, this vid was really helpful.

[PANKAJKUMAR-fezn]

It was interesting example to understand the concept.Thanks Sir

[printmusicm]

Please jaldi jaldi topics upload kijiye....
And nice topics....

[VishalSharma-rnmt]

Amazing explanation, very clear and simple