Ensuring CSS styles are permanent and unchangeable

Question

Ensuring CSS styles are permanent and unchangeable

Can someone guide me on how to ensure CSS styles remain immutable and cannot be overridden by JavaScript?

The issue at hand is that sometimes, due to the presence of an img tag in the JavaScript code, all styling (for all images) ends up being replaced.

Take a look at my code snippet:

 <img src='logoImg' style='width:45px; height:30px;' >

I am seeking suggestions on achieving this goal either through JavaScript or within the CSS itself.

Expected result: I want the Logo Image to retain its finalized appearance, unaffected by any manipulations from JavaScript via the DOM (document object model).

html css dom

Answer 1

Answer №1

To safeguard your CSS properties from being altered, consider incorporating the !important keyword.

Illustration

const test = document.getElementById("test");

// The color won't change to orange
// due to !important keyword in the CSS code
test.style.backgroundColor = "orange";

#test {
  width: 50px;
  height: 50px;
  background: green !important;
}

<div id="test"></div>

However, it is advisable to explore alternative methods such as utilizing a more specific approach to select HTML elements and modify their attributes.

If you encounter styling conflicts when targeting a tag, you can supersede them by employing a class or an id in your CSS. Similarly, when searching for elements in JavaScript, opt for selecting them using a class name or an id value.

In your scenario, a practical solution could involve revising/adapting the JavaScript code that interacts with your img tags. You could either exclude images with a designated class like 'logo' or establish a custom class for standard images devoid of the logo aspect and access them in your JavaScript through document.getElementsByClassName method.

Answer 2

To safeguard your CSS properties from being altered, consider incorporating the !important keyword.

Illustration

const test = document.getElementById("test");

// The color won't change to orange
// due to !important keyword in the CSS code
test.style.backgroundColor = "orange";

#test {
  width: 50px;
  height: 50px;
  background: green !important;
}

<div id="test"></div>

However, it is advisable to explore alternative methods such as utilizing a more specific approach to select HTML elements and modify their attributes.

If you encounter styling conflicts when targeting a tag, you can supersede them by employing a class or an id in your CSS. Similarly, when searching for elements in JavaScript, opt for selecting them using a class name or an id value.

In your scenario, a practical solution could involve revising/adapting the JavaScript code that interacts with your img tags. You could either exclude images with a designated class like 'logo' or establish a custom class for standard images devoid of the logo aspect and access them in your JavaScript through document.getElementsByClassName method.

Answer 3

Answer №2

In order to prevent JavaScript from overriding the styling of an image, you can apply CSS styling with the important; declaration to increase its specificity weight. The use of !important in CSS carries a higher specificity weight compared to inline styles, which are typically added by JavaScript and therefore will not be overridden.

function resize() {
  document.querySelector("img").style.height = "200px";
  document.querySelector("img").style.width = "200px";
}

img.test {
  width: 45px !important;
  height: 30px !important;
}

<img src='https://via.placeholder.com/200x200.jpg' class="test">
<button onclick="resize()">Test</button>

Answer 4

In order to prevent JavaScript from overriding the styling of an image, you can apply CSS styling with the important; declaration to increase its specificity weight. The use of !important in CSS carries a higher specificity weight compared to inline styles, which are typically added by JavaScript and therefore will not be overridden.

function resize() {
  document.querySelector("img").style.height = "200px";
  document.querySelector("img").style.width = "200px";
}

img.test {
  width: 45px !important;
  height: 30px !important;
}

<img src='https://via.placeholder.com/200x200.jpg' class="test">
<button onclick="resize()">Test</button>

Ensuring CSS styles are permanent and unchangeable

Answer №1

Illustration

Answer №2

Similar questions

What is the reasoning behind utilizing the "&" selector in CSS?

What is the best way to add a "Submit" button to a JavaScript/HTML calculation form?

gather data from a separate HTML document's form

Creating a navigation menu that uses images to simulate borders instead of using traditional border styling in CSS

Stop the div from collapsing when hiding or deleting all child elements to maintain its structure

"Combining HTML, PHP, and JavaScript for Dynamic Web

Is there a way to customize the color of a MUI styled component?

In right-to-left mode, two items in Owl Carousel vanish while dragging or touching

What is the process for displaying an image within a content-editable field?

Can you guide me on setting up a multi-selection option for a field in my Wordpress Theme by Templatic?

Tips for preventing unstyled content flash when updating CSS files dynamically

Utilize the data storage API within Next.js or directly in the user's

What is the best method for creating uniform cards with different amounts of text that won't cause overflow issues?

Adding additional images to the left side of the slide

Prompt user to leave page without saving changes on JQuery Dialog

The issue of MUI components overlapping arises during window resizing

What causes the variation in results when I input CSS directly into the head section versus linking it from a separate .css file?

Customize Individual Rows in a React DataGrid

Error: Custom button causing issue with 'file' input field

Restrict the input box in Angular to only accept non-numeric characters