What are the applications of Javascript Programming?

Javascript > Fundamentals of Javascript > Why Javascript!

Long Question

2506

Answer:

Javascript is one of the most widely used programming languages (Front-end as well as Back-end). It has its presence in almost every area of software development. I'm going to list a few of them here:

Client-side validation - This is really important to verify any user input before submitting it to the server and Javascript plays an important role in validating those inputs at the front-end itself.
Manipulating HTML Pages - Javascript helps in manipulating the HTML page on the fly. This helps in adding and deleting any HTML tag very easily using javascript and modify your HTML to change its look and feel based on different devices and requirements.
User Notifications - You can use Javascript to raise dynamic pop-ups on the webpages to give different types of notifications to your website visitors.
Back-end Data Loading - Javascript provides Ajax library which helps in loading back-end data while you are doing some other processing. This really gives an amazing experience to your website visitors.
Presentations - JavaScript also provides the facility of creating presentations that give the website look and feel. JavaScript provides RevealJS and BespokeJS libraries to build a web-based slide presentation.
Server Applications - Node JS is built on Chrome's Javascript runtime for building fast and scalable network applications. This is an event-based library that helps in developing very sophisticated server applications including Web Servers.

This list goes on, there are various areas where millions of software developers are happily using Javascript to develop great websites and other software.

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941. How to get dynamic ID of a button in jQuery

Answer:

I have written below code of HTML. Here id="1" , id="2", id="3", id="4" ............ id="100" dynamically created.


<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<ul class="dropdown-menu"> 
<li><button type="button" id="1" class="highlight"> Edit </button> </li>
<li><button type="button" id="2" class="highlight"> Edit </button> </li>
<li><button type="button" id="3" class="highlight"> Edit </button> </li>
<li><button type="button" id="4" class="highlight"> Edit </button> </li>
...............................

<li><button type="button" id="100" class="highlight"> Edit </button> </li>
</ul>

Way 1: you can use this jQuery code.

In this case we are targeting the class highlight and then taking the id using attr() function.

I have written below code of HTML.


<script type="text/javascript"> 

$(document).ready(function() {  
$('.highlight').on('click', function(e){
     var id = $(this).attr('id');
     alert(id); 
});
});

</script>

Way 2: Below Code also works Fine

In this process I am directly targeting the class and taking its id.

I have written below code of HTML.


<script type="text/javascript"> 

$(document).ready(function() {  
 
$(document).on("click", ".highlight", function() {
  var id =  this.id; 
  alert(id); 
});

});

</script>

# Tutorial: Function Introduction

Question: Function in Javascript Short

What are the applications of Javascript Programming?

Answer:

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941. How to get dynamic ID of a button in jQuery

Way 1: you can use this jQuery code.

Way 2: Below Code also works Fine

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