There are a few easy ways to quickly get started with Bootstrap, each one appealing to a different skill level and use case. Read through to see what suits your particular needs.
The fastest way to get started is to get the compiled and minified versions of our CSS and JavaScript. No documentation or original source files are included.
The folks over at NetDNA have graciously provided CDN support for Bootstrap's CSS and JavaScript. To use, swap your local instances for the Bootstrap CDN links listed below.
{% highlight html linenos %} {% endhighlight %}Within the download you'll find the following directories and files, logically grouping common assets and providing both compiled and minified variations.
Once downloaded, unzip the compressed folder to see the structure of (the compiled) Bootstrap. You'll see something like this:
{% highlight bash %} bootstrap/ ├── css/ │ ├── bootstrap.css │ ├── bootstrap.min.css ├── js/ │ ├── bootstrap.js │ ├── bootstrap.min.js {% endhighlight %}This is the most basic form of Bootstrap: compiled files for quick drop-in usage in nearly any web project. We provide compiled CSS and JS (bootstrap.*), as well as compiled and minified CSS and JS (bootstrap.min.*).
Please note that all JavaScript plugins require jQuery to be included, as shown in the starter template.
Make use of a super basic HTML template, or dive into a few examples we've started for you. We encourage folks to iterate on these examples and not simply use them as an end result.
Copy and paste the HTML from below to get started with a bare bones Bootstrap document.
{% highlight html %}Check out the new Examples repository on GitHub, or view them in your browser. Included are over a dozen example templates for building with and extending Bootstrap.
Bootstrap is built to work best in the latest desktop and mobile browsers, meaning older and less advanced browsers might receive a less stylized, though fully functional, version of certain components.
Specifically, we support the latest versions of the following:
Unofficially, Bootstrap should look and behave well enough in Chromium for Linux and Internet Explorer 7, though they are not officially supported.
Internet Explorer 8 and 9 are also supported, however, please be aware that many CSS3 properties—e.g., rounded corners and shadows—are not supported by IE8. The placeholder attribute is also not supported in either of these versions.
In addition, Internet Explorer 8 requires the use of respond.js to enable media query support.
Bootstrap is not supported in the old Internet Explorer compatibility modes. To be sure you're using the latest rendering mode for IE, consider including the appropriate meta tag in your pages.
See this StackOverflow question for more information.
Internet Explorer 10 doesn't differentiate device width from viewport width, and thus doesn't properly apply the media queries in Bootstrap's CSS. To address this, you can optionally include the following CSS and JavaScript to work around this problem until Microsoft issues a fix.
{% highlight css %} @-webkit-viewport { width: device-width; } @-moz-viewport { width: device-width; } @-ms-viewport { width: device-width; } @-o-viewport { width: device-width; } @viewport { width: device-width; } {% endhighlight %} {% highlight js %} if (navigator.userAgent.match(/IEMobile\/10\.0/)) { var msViewportStyle = document.createElement("style"); msViewportStyle.appendChild( document.createTextNode( "@-ms-viewport{width:auto!important}" ) ); document.getElementsByTagName("head")[0].appendChild(msViewportStyle); } {% endhighlight %}For more information and usage guidelines, read Windows Phone 8 and Device-Width.
In the latest Safari for Mac, its rendering engine has a little trouble with the long decimal places of our .col-*-1 grid classes, meaning if you have 12 individual columns you'll notice they come up short compared to other rows of columns. There's not much we can do here (see #9282) but you do have some options:
.pull-right to your last grid column to get the hard-right alignmentWe'll keep an eye on this though and update our code if we have an easy solution.
While we don't officially support any third party plugins or add-ons, we do offer some useful advice to help avoid potential issues in your projects.
If you're using Google Maps on a Bootstrapped project, you might run into some display problems due to our use of * { box-sizing: border-box; }. Previously, you may have also ran into issues with the use of max-width on images. The following snippet should avoid all those problems.
Bootstrap follows common web standards, and with minimal extra effort, can be used to create sites that are accessibile to those using AT.
If your navigation contains many links and comes before the main content in the DOM, add a Skip to content link immediately after your opening <body> tag. (read why)
Another "gotcha" has to do with how you nest your <header> elements. Section 508 states that your largest header must be an h1, and the next header must be an <h2>, etc. This is hard to achieve in practice, but if the largest header on your site is smaller than Bootstrap's default 38px, you should consider modifying your stylesheets before using a smaller header element.
Bootstrap is released under the Apache 2 license and is copyright {{ site.time | date: "%Y" }} Twitter. Boiled down to smaller chunks, it can be described with the following conditions.
The full Bootstrap license is located in the project repository for more information.
Customizing Bootstrap is best accomplished when you treat it as another dependency in your development stack. Doing so ensures future upgrades are as easy as possible while also familiarizing yourself to the intricacies of the framework.
Once you've downloaded and included Bootstrap's CSS into your templates, you can move on to customizing the included components. To do so, create a new stylesheet (LESS, if you like, or just plain CSS) to house your customizations.
Unless you plan on reading a good chunk of the compiled CSS, go with the minified. It's the same code, just compacted. Less bandwidth is good, especially in production environments.
From there, include whatever Bootstrap components and HTML content you need to get your template setup. It's best to have a rough idea in mind of modifications to make and content to include, so be sure to spend a brief amount of time on that before moving on.
There are varying degrees to customizing components, but most fall into two camps: light customizations and complete visual overhauls. Luckily, there are plenty of examples of both.
We define light customizations as mostly surface layer changes, things like a color and font changes to existing Bootstrap components. A great example of this is the the Twitter Translation Center (coded by @mdo). Let's look at how to implement the custom button we wrote for this site, .btn-ttc.
Instead of using the provided Bootstrap buttons, which only require just one class to start, .btn, we'll add our own modifier class, .btn-ttc. This will give us a slightly custom look with minimal effort.
In the custom stylesheet, add the following CSS:
{% highlight css %} /* Custom button -------------------------------------------------- */ /* Override base .btn styles */ /* Apply text and background changes to three key states: default, hover, and active (click). */ .btn-ttc, .btn-ttc:hover, .btn-ttc:active { color: white; text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25); background-color: #007da7; } /* Apply the custom-colored gradients */ /* Note: you'll need to include all the appropriate gradients for various browsers and standards. */ .btn-ttc { background-repeat: repeat-x; background-image: linear-gradient(top, #009ED2 0%, #007DA7 100%); ... } /* Set the hover state */ /* An easy hover state is just to move the gradient up a small amount. Add other embellishments as you see fit. */ .btn-ttc:hover { background-position: 0 -15px; } {% endhighlight %}Customizing Bootstrap components takes time, but should be straightforward. Look to the source code often and duplicate the selectors you need for your modifications. Placing them after the Bootstrap source makes for easy overriding without complication. To recap, here's the basic workflow:
.navbar.!important here.Going beyond light customizations and into visual overhauls is just as straightforward as the above custom button. For a site like Karma, which uses Bootstrap as a CSS reset with heavy modifications, more extensive work is involved, but well worth it in the end.
While not recommended for folks new to Bootstrap, you may use one of two alternate methods for customization. The first is modifying the source .less files (making upgrades super difficult), and the second is mapping source LESS code to your own classes via mixins. For the time being, neither options are documented here.
Not all sites and applications need to make use of everything Bootstrap has to offer, especially in production environments where bandwidth literally becomes a financial issue. We encourage folks to remove whatever is unused with our Customizer.
Using the Customizer, simply uncheck any component, feature, or asset you don't need. Hit download and swap out the default Bootstrap files with these newly customized ones. You'll get vanilla Bootstrap, but without the features *you* deem unnecessary. All custom builds include compiled and minified versions, so use whichever works for you.