Modifying a css class via javascript

Question

Modifying a css class via javascript

Is it possible to set an element's height using CSS to match the window inner height without directly modifying its style with JavaScript? Can this be achieved by changing a CSS class with JavaScript?

One attempted solution involved:

document.getElementById('root').style.setProperty('--view-height', window.innerHeight +'px');

And in CSS:

.menu {
    height: var(--view-height) !important;
}

While this approach worked, it relied on CSS Variables which may not be supported in older browsers. Is there an alternative method that can achieve similar results?

EDIT: Several responses have suggested JavaScript solutions, but I specifically need to avoid altering the element's style directly with JavaScript. The goal is to accomplish this solely through CSS class styling.

javascript css sass

Answer 1

Answer №1

If you are using a modern browser, you have the option to utilize the following code:

document.getElementById("MyElement").classList.add('MyClass');
document.getElementById("MyElement").classList.remove('MyOtherClass');

However, for your specific scenario, I recommend considering the solution provided by לבני מלכה.

Answer 2

If you are using a modern browser, you have the option to utilize the following code:

document.getElementById("MyElement").classList.add('MyClass');
document.getElementById("MyElement").classList.remove('MyOtherClass');

However, for your specific scenario, I recommend considering the solution provided by לבני מלכה.

Answer 3

Answer №2

Perhaps consider utilizing CSS properly:

window.innerHeight +'px' will yield the same height as using 100vh. The unit vh refers to "viewport height," where 100vh represents the entire height of the inner window.

For more information, visit: https://developer.mozilla.org/en-US/docs/Web/CSS/length#Viewport-percentage_lengths

Answer 4

Perhaps consider utilizing CSS properly:

window.innerHeight +'px' will yield the same height as using 100vh. The unit vh refers to "viewport height," where 100vh represents the entire height of the inner window.

For more information, visit: https://developer.mozilla.org/en-US/docs/Web/CSS/length#Viewport-percentage_lengths

Answer 5

Answer №3

Implement JavaScript to set the height dynamically using variables instead of hardcoding it:

let rootElement = document.getElementById('root');
rootElement.style.height = window.innerHeight + 'px';

Here's an example:

 let rootElement = document.getElementById('root');
rootElement.style.height = window.innerHeight + 'px';

#root{
background-color: red;
}

<div id="root"></div>

If you prefer not to use JavaScript, you can achieve the same effect with CSS by using height: 100vh;:

#root{
height: 100vh;
background-color: red;
}

<div id="root"></div>

Answer 6

Implement JavaScript to set the height dynamically using variables instead of hardcoding it:

let rootElement = document.getElementById('root');
rootElement.style.height = window.innerHeight + 'px';

Here's an example:

 let rootElement = document.getElementById('root');
rootElement.style.height = window.innerHeight + 'px';

#root{
background-color: red;
}

<div id="root"></div>

If you prefer not to use JavaScript, you can achieve the same effect with CSS by using height: 100vh;:

#root{
height: 100vh;
background-color: red;
}

<div id="root"></div>

Answer 7

Answer №4

Utilizing the vh unit is recommended for achieving this effect.. However, it's worth noting that Mahboobeh Mohammadi pointed out it may not be compatible with iOS devices. height: 100vh; sets the height to equal the full viewport height.

Answer 8

Utilizing the vh unit is recommended for achieving this effect.. However, it's worth noting that Mahboobeh Mohammadi pointed out it may not be compatible with iOS devices. height: 100vh; sets the height to equal the full viewport height.

Answer 9

Answer №5

Here is a simple JavaScript code snippet for adding and removing classes by ID:

function addClassById (_id,_class) {
  document.getElementById(_id).classList.add(_class);
}

function removeClassById (_id,_class) {
  document.getElementById(_id).classList.remove(_class);
}

addClassById("root","newClass")

If you prefer an easier way to manipulate the DOM, consider using jQuery. Simply include the following CDN link in your head tag:

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

// Change CSS using jQuery
$("#root").css({
"background-color": "yellow", 
"font-size": "200%"
});

// Add a class using jQuery
$("#root").addClass('newClass');

// Remove a class using jQuery
$("#root").removeClass('newClass')

I hope this information proves helpful to you.

Answer 10

Here is a simple JavaScript code snippet for adding and removing classes by ID:

function addClassById (_id,_class) {
  document.getElementById(_id).classList.add(_class);
}

function removeClassById (_id,_class) {
  document.getElementById(_id).classList.remove(_class);
}

addClassById("root","newClass")

If you prefer an easier way to manipulate the DOM, consider using jQuery. Simply include the following CDN link in your head tag:

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

// Change CSS using jQuery
$("#root").css({
"background-color": "yellow", 
"font-size": "200%"
});

// Add a class using jQuery
$("#root").addClass('newClass');

// Remove a class using jQuery
$("#root").removeClass('newClass')

I hope this information proves helpful to you.

Modifying a css class via javascript

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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