What is the best way to replace a CSS Background that is already marked as important?

Attempting to change the background of a website using Stylish, but encountering issues. The existing background css on the website includes an !important rule which is preventing Stylish from taking effect.

Here is my code:

body {
  background-image: none !important; 
  background: black !important;
}

Answer №1

To provide a more detailed explanation, consider implementing the comprehensive guide to CSS specificity, such as utilizing the > selector:

body {
  background-image: none !important; 
  background: blue !important;
}

html > body {
  background-image: none !important; 
  background: green !important;
}

JSFiddle

Answer №2

My first piece of advice is to minimize the use of !important in your CSS code and try to avoid it whenever possible.

If you need to target a specific element, it's better to define a more precise CSS path for that element so it takes precedence over others. For instance:

.elem { 
    color: black!important; 
}

#list1 > .elem { 
    color: red!important; 
}

Answer №3

To understand how specificity functions, refer to the official documentation available here. Essentially, in a high number base, specificity can be calculated as follows:

(100 * ID rules) + (10 * class rules) + (1 * tag rules)
.

If you encounter a challenging website or need to apply a broad rule, consider using

:not(#some_id_which_you_will_never_find)
to artificially boost specificity. Remember that ID rules carry the most weight and should be utilized.

For instance, I aimed to prevent any div element on a site from being hidden with visibility: hidden, so I implemented the following code:

div:not(#oStHDi_0):not(#oStHDi_1):not(#oStHDi_2):not(#oStHDi_3):not(#oStHDi_4):not(#oStHDi_5) {
    visibility: inherit !important;
}

This code snippet boasts a specificity value of 601.

In comparison, the specificity for body is 001, html > body equates to 002, and body:not(#foobar) holds a specificity of 101.

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