What is the best way to manipulate the width of a div element using JavaScript or jQuery?

Here is the code snippet I am working with:

HTML:

<div id="myDiv" class="container">
  ....
</div>

CSS:

div.container {
    width: 300px;
    height: 400px;
    border: solid 1px black;
    overflow: hidden;
    background:  #efefef;
}

JS:

var myDiv = document.getElementById("myDiv");
var pageWidth = parseInt(myDiv.style.width);

I am trying to read and change CSS properties using JavaScript. However, when I searched on Google for a solution and implemented the JS code from a link, I encountered an issue while inspecting in Safari's web inspector. The problem seems to be related to how I applied the JS code. Can someone help me understand what went wrong here?

javascriptjqueryhtmlcss

Answer №1

let size = parseInt($('#specificDiv').width(), 10);

Answer №2

If you're looking to manipulate styles, consider using the css method:

$("#specificDiv").css("width","desiredWidthHere");

For retrieving the width of an element, simply utilize:

$("#targetElementId").width();

Answer №3

give this a shot 

alert($('yourdiv').width());

interactive demonstration available here

Answer №4

Give this a shot: 

$("#myDiv").addClass("full-width");

Answer №5

Accessing the class property through this code is not possible.

var myDiv = document.getElementById("myDiv"); var pageWidth = parseInt(myDiv.style.width);

To tackle this, I prefer using jQuery. Here's an example snippet:

<html>
    <head>
        <style>
            div.container { width: 300px; height: 400px; border: solid 1px black; overflow: hidden; background:  #efefef;}
        </style>    
        <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js" type="text/javascript"></script>
    </head>
    <body><div id="myDiv" class="container"> hi...</div></body>
</html>

Incorporating this approach will allow you to effortlessly retrieve and modify the width using jQuery methods:

$("#myDiv").width(); //Get $("#myDiv").width(500); //Set

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