How can I overwrite the stylings in Twitter Bootstrap? For instance, I am currently using a .sidebar class that has the CSS rule 'float: left;' How can I change this so that it goes to the right instead? I'm using HAML and SASS but am relatively new to web development.
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You can just make sure your css file parses AFTER boostrap.css , like so:
<link href="css/bootstrap.css" rel="stylesheet">
<link href="css/myFile.css" rel="stylesheet">
All these tips will work, but a simpler way might be to include your stylesheet after the Bootstrap styles.
If you include your css (site-specific.css) after Bootstrap's (bootstrap.css), you can override rules by redefining them.
For example, if this is how you include CSS in your <head>
<link rel="stylesheet" href="css/bootstrap.css" />
<link rel="stylesheet" href="css/site-specific.css" />
You can simply move the sidebar to the right by writing (in your site-specific.css file):
.sidebar {
float: right;
}
Forgive the lack of HAML and SASS, I do not know them well enough to write tutorials in them.
I know this is an old question but still, I came across a similar problem and i realized that my "not working" css code in my bootstrapOverload.css file was written after the media queries. when I moved it above media queries it started working.
Just in case someone else is facing the same problem
You can overwrite a CSS class by making it "more specific".
You go up the HTML tree, and specify parent elements:
div.sidebar { ... } is more specific than .sidebar { ... }
You can go all the way up to BODY if you need to:
body .sidebar { ... } will override virtually anything.
See this handy guide: http://css-tricks.com/855-specifics-on-css-specificity/
If you want to overwrite any css in bootstrap use !important
Let's say here is the page header class in bootstrap which have 40px margin on top, my client don't like it and he want it to be 15 on top and 10 on bottom only
.page-header {
border-bottom: 1px solid #EEEEEE;
margin: 40px 0 20px;
padding-bottom: 9px;
}
So I added on class in my site.css file with the same name like this
.page-header
{
padding-bottom: 9px;
margin: 15px 0 10px 0px !important;
}
Note the !important with my margin, which will overwrite the margin of bootstarp page-header class margin.
The answer to this is CSS Specificity. You need to be more "specific" in your CSS so that it can override bootstrap css properties.
For example you have a sample code for a bootstrap menu here:
<nav class="navbar navbar-inverse navbar-fixed-top" role="navigation">
<div id="home-menu-container" class="collapse navbar-collapse">
<ul id="home-menu" class="nav navbar-nav">
<li><a class="navbar-brand" href="#"><img src="images/xd_logo.png" /></a></li>
<li><a href="#intro">Home</a></li>
<li><a href="#about">About Us</a></li>
<li><a href="#services">What We Do</a></li>
<li><a href="#process">Our Process</a><br /></li>
<li><a href="#portfolio">Portfolio</a></li>
<li><a href="#contact">Contact Us</a></li>
</ul>
</div><!-- /.navbar-collapse -->
</nav>
Here, you need to remember the hierarchy of the specificity. It goes like this:
So, for the above if your css has something like this:
.navbar ul li a { color: red; } /* 10(.navbar) + 1(ul) + 1(li) + 1(a) = 13 points */
.navbar a { color: green; } /* 10(.navbar) + 1(a) = 11 points */
So, even if you have defined the .navbar a after .navbar ul li a it is still going to override with a red colour, instead of a green since the specificity is more (13 points).
So, basically all you need to do is calculate the points for the element you are wanting to change the css for, via inspect element on your browser. Here, bootstrap has specified its css for the element as
.navbar-inverse .navbar-nav>li>a { /* Total = 22 points */
color: #999;
}
So, even if your css is loading is being loaded after bootstrap.css which has the following line:
.navbar-nav li a {
color: red;
}
it's still going to be rendered as #999. In order to solve this, bootstrap has 22 points (calculate it yourself). So all we need is something more than that. Thus, I have added custom IDs to the elements i.e. home-menu-container and home-menu. Now the following css will work:
#home-menu-container #home-menu li a { color: red; } /* 100 + 100 + 1 + 1 = 202 points :) */
Done.
You can refer to this MDN link.
Came across this late, but I think it could use another answer.
If you're using sass, you can actually change the variables before you import bootstrap. http://twitter.github.com/bootstrap/customize.html#variables
Change any of them, such as:
$bodyBackground: red;
@import "bootstrap";
Alternatively if there isn't a variable available for what you want to change, you can override the styles or add your own.
Sass:
@import "bootstrap";
/* override anything manually, like rounded buttons */
.btn {
border-radius: 0;
}
Also see this: Proper SCSS Asset Structure in Rails
Source: Stackoverflow.com