HTML - Emphasize the importance of CSS styling

I am working on an HTML file that is loading two stylesheets:

  1. Bootstrap style (bootstrap.css)
  2. Custom app style (site.css)

The code in bootstrap.css currently looks like this:

.modal-open .modal {
    overflow-x: hidden;
    overflow-y: auto;
}

How can I modify my site.css to give priority to its styles over those defined in bootstrap.css, without making any changes in the latter?

.modal-open .modal {
    overflow-x: hidden;
    overflow-y: scroll;
    background-color: #D5D5D5
}

Answer №1

Instead of using !important, you have the option to include your custom style sheet after the bootstrap stylesheet within the <head> section of your website:

<link href="bootstrap.css" rel="stylesheet">
<link href="custom.css" rel="stylesheet">

In this way, if there are any conflicting CSS selectors/properties, the styles from custom.css will take precedence over those in bootstrap.css

Answer №2

To begin, make sure to include the site.css file after bootstrap.css, as suggested by @luka. While this method is generally effective, Bootstrap's rulesets have high specificity which may sometimes cause conflicts. It seems like in your particular case, you shouldn't encounter any issues. However, it's possible that Bootstrap's rulesets may overlap and there could be an unknown factor preventing your ruleset from taking effect.

If rearranging the order of site.css and bootstrap.css doesn't solve the problem, avoid using !important. Instead, try duplicating your selector:

.modal-open.modal-open .modal.modal {
    overflow-x: hidden;
    overflow-y: scroll;
    background-color: #D5D5D5
}

As per this online tool, the CSS specificity score of the mentioned selector is 4, whereas Bootstrap's score is 2. This approach has consistently worked well for me over the years.

Answer №3

One solution is to incorporate the !important declaration:

.modal-open .modal {
    overflow-x: hidden !important;
    overflow-y: scroll !important;
    background-color: #D5D5D5 !important;
}

Answer №4

Here are a few possibilities for handling the situation:

  • If the rule is an exact match, the last rule will be applied. For example, if you first linked to bootstrap.css and then to site.css, the styles in site.css will take precedence.
  • You could consider using the !important declaration (although this is not always recommended).
  • An alternative approach would be to duplicate the selectors like so:
    .modal-open.modal-open .modal.modal {...}

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