What is Event Bubbling and Event Capturing in JavaScript?

What is Event Bubbling?

Bubbling in real life is when a bubble goes from the bottom of the glass to the top of it. When you put the soda into the glass, you see bubbles go from the bottom to the top. But in the JavaScript Programming language, Event Bubbling happens when you have an event on an element of a web page. The execution of that event starts from the lowest element to the top element. So event bubbling is the process of executing the document object model events starting from the element where we add that event until we reach the top parent element.

#technology #front-end-development #web-development #javascript #event-bubbling

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What is Event Bubbling and Event Capturing in JavaScript?

What is Event Bubbling?

Bubbling in real life is when a bubble goes from the bottom of the glass to the top of it. When you put the soda into the glass, you see bubbles go from the bottom to the top. But in the JavaScript Programming language, Event Bubbling happens when you have an event on an element of a web page. The execution of that event starts from the lowest element to the top element. So event bubbling is the process of executing the document object model events starting from the element where we add that event until we reach the top parent element.

#technology #front-end-development #web-development #javascript #event-bubbling

What is JavaScript - Stackfindover - Blog

Who invented JavaScript, how it works, as we have given information about Programming language in our previous article ( What is PHP ), but today we will talk about what is JavaScript, why JavaScript is used The Answers to all such questions and much other information about JavaScript, you are going to get here today. Hope this information will work for you.

Who invented JavaScript?

JavaScript language was invented by Brendan Eich in 1995. JavaScript is inspired by Java Programming Language. The first name of JavaScript was Mocha which was named by Marc Andreessen, Marc Andreessen is the founder of Netscape and in the same year Mocha was renamed LiveScript, and later in December 1995, it was renamed JavaScript which is still in trend.

What is JavaScript?

JavaScript is a client-side scripting language used with HTML (Hypertext Markup Language). JavaScript is an Interpreted / Oriented language called JS in programming language JavaScript code can be run on any normal web browser. To run the code of JavaScript, we have to enable JavaScript of Web Browser. But some web browsers already have JavaScript enabled.

Today almost all websites are using it as web technology, mind is that there is maximum scope in JavaScript in the coming time, so if you want to become a programmer, then you can be very beneficial to learn JavaScript.

JavaScript Hello World Program

In JavaScript, ‘document.write‘ is used to represent a string on a browser.

<script type="text/javascript">
	document.write("Hello World!");
</script>

How to comment JavaScript code?

• For single line comment in JavaScript we have to use // (double slashes)
• For multiple line comments we have to use / * – – * /

<script type="text/javascript">

//single line comment

/* document.write("Hello"); */

</script>

Advantages and Disadvantages of JavaScript

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Easiest Series For Learning Javascript - Javascript Events - Video 15

Read more about javascript events here -https://www.w3schools.com/js/js_events.asp

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How Event bubbling & Event capturing works

To be clear, even bubbling and event capturing is not a react concept but a javascript & concept surrounding the behavior of the dom.

To understand event bubbling, we first need to understand how the dom works.

DOM, also known as Document Object Model, is the data representation of all the nodes and contents of the web application.

This probably doesn’t make a lot of sense unless you are a developer so allow me to be even more bare bone about this:

• The DOM is what allows you to see all the stuff on this web browser and it manages it.

Here is a better picture of how it can look like:

Let’s say we the div and the p are attached with onClick functions themselves, with the div’s onclick function printing out “console.log(“this is div”)” and the p’s onclick function printing out “console.log(“this is p”)”.

With event bubbling, when the user clicks on p it will bubble down to p, trigger the onclick function there, the trigger div’s onclick function and another onclick function that its parents and/or grandparent nodes contain.

The workflow will be as following: p->div-> body-> html

Here is an example of how it will work in a react application:

#javascript #event-bubbling #html

7 Tips for a Successful Live Event Coverage - Studio 52

Live events have been a growing trend in the events industry this past year, offering many businesses a much-needed lifeline. Read on for our simple tips to planning your virtual event

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