Get started with Bootstrap, the world’s most popular framework for building responsive, mobile-first sites, with jsDelivr and a template starter page.
Quick start
Looking to quickly add Bootstrap to your project? Use jsDelivr, provided for free by the folks at jsDelivr. Using a package manager or need to download the source files? Head to the downloads page.
CSS
Copy-paste the stylesheet into your before all other stylesheets to load our CSS.
Many of our components require the use of JavaScript to function. Specifically, they require jQuery, Popper.js, and our own JavaScript plugins. Place the following s near the end of your pages, right before the closing
tag, to enable them. jQuery must come first, then Popper.js, and then our JavaScript plugins.
We use jQuery’s slim build, but the full version is also supported.
Curious which components explicitly require jQuery, our JS, and Popper.js? Click the show components link below. If you’re at all unsure about the general page structure, keep reading for an example page template.
Our bootstrap.bundle.js and bootstrap.bundle.min.js include Popper, but not jQuery. For more information about what’s included in Bootstrap, please see our contents section.
Alerts for dismissing
Buttons for toggling states and checkbox/radio functionality
Carousel for all slide behaviors, controls, and indicators
Collapse for toggling visibility of content
Dropdowns for displaying and positioning (also requires Popper.js)
Modals for displaying, positioning, and scroll behavior
Navbar for extending our Collapse plugin to implement responsive behavior
Tooltips and popovers for displaying and positioning (also requires Popper.js)
Scrollspy for scroll behavior and navigation updates
Starter template
Be sure to have your pages set up with the latest design and development standards. That means using an HTML5 doctype and including a viewport meta tag for proper responsive behaviors. Put it all together and your pages should look like this:
That’s all you need for overall page requirements. Visit the Layout docs or our official examples to start laying out your site’s content and components.
Important globals
Bootstrap employs a handful of important global styles and settings that you’ll need to be aware of when using it, all of which are almost exclusively geared towards the normalization of cross browser styles. Let’s dive in.
HTML5 doctype
Bootstrap requires the use of the HTML5 doctype. Without it, you’ll see some funky incomplete styling, but including it shouldn’t cause any considerable hiccups.
Responsive meta tag
Bootstrap is developed mobile first, a strategy in which we optimize code for mobile devices first and then scale up components as necessary using CSS media queries. To ensure proper rendering and touch zooming for all devices, add the responsive viewport meta tag to your .
You can see an example of this in action in the starter template.
Box-sizing
For more straightforward sizing in CSS, we switch the global box-sizing value from content-box to border-box . This ensures padding does not affect the final computed width of an element, but it can cause problems with some third party software like Google Maps and Google Custom Search Engine.
On the rare occasion you need to override it, use something like the following:
.selector-for-some-widgetbox-sizing:content-box;>
With the above snippet, nested elements—including generated content via ::before and ::after —will all inherit the specified box-sizing for that .selector-for-some-widget .
Reboot
For improved cross-browser rendering, we use Reboot to correct inconsistencies across browsers and devices while providing slightly more opinionated resets to common HTML elements.
Community
Stay up to date on the development of Bootstrap and reach out to the community with these helpful resources.
Follow @getbootstrap on Twitter.
Read and subscribe to The Official Bootstrap Blog.
Chat with fellow Bootstrappers in IRC. On the irc.freenode.net server, in the ##bootstrap channel.
Implementation help may be found at Stack Overflow (tagged bootstrap-4 ).
Developers should use the keyword bootstrap on packages which modify or add to the functionality of Bootstrap when distributing through npm or similar delivery mechanisms for maximum discoverability.
You can also follow @getbootstrap on Twitter for the latest gossip and awesome music videos.
Bootstrap is a powerful, feature-packed frontend toolkit. Build anything—from prototype to production—in minutes.
Quick start
Get started by including Bootstrap’s production-ready CSS and JavaScript via CDN without the need for any build steps. See it in practice with this Bootstrap CodePen demo.
Create a new index.html file in your project root. Include the tag as well for proper responsive behavior in mobile devices.
You can also include Popper and our JS separately. If you don’t plan to use dropdowns, popovers, or tooltips, save some kilobytes by not including Popper.
You can also use the CDN to fetch any of our additional builds listed in the Contents page.
Next steps
Read a bit more about some important global environment settings that Bootstrap utilizes.
Read about what’s included in Bootstrap in our contents section and the list of components that require JavaScript below.
Need a little more power? Consider building with Bootstrap by including the source files via package manager.
Looking to use Bootstrap as a module with ? Please refer to our using Bootstrap as a module section.
JS components
Curious which components explicitly require our JavaScript and Popper? Click the show components link below. If you’re at all unsure about the general page structure, keep reading for an example page template.
Alerts for dismissing
Buttons for toggling states and checkbox/radio functionality
Carousel for all slide behaviors, controls, and indicators
Collapse for toggling visibility of content
Dropdowns for displaying and positioning (also requires Popper)
Modals for displaying, positioning, and scroll behavior
Navbar for extending our Collapse and Offcanvas plugins to implement responsive behaviors
Navs with the Tab plugin for toggling content panes
Offcanvases for displaying, positioning, and scroll behavior
Scrollspy for scroll behavior and navigation updates
Toasts for displaying and dismissing
Tooltips and popovers for displaying and positioning (also requires Popper)
Important globals
Bootstrap employs a handful of important global styles and settings, all of which are almost exclusively geared towards the normalization of cross browser styles. Let’s dive in.
HTML5 doctype
Bootstrap requires the use of the HTML5 doctype. Without it, you’ll see some funky and incomplete styling.
Viewport meta
Bootstrap is developed mobile first, a strategy in which we optimize code for mobile devices first and then scale up components as necessary using CSS media queries. To ensure proper rendering and touch zooming for all devices, add the responsive viewport meta tag to your .
You can see an example of this in action in the quick start.
Box-sizing
For more straightforward sizing in CSS, we switch the global box-sizing value from content-box to border-box . This ensures padding does not affect the final computed width of an element, but it can cause problems with some third-party software like Google Maps and Google Custom Search Engine.
On the rare occasion you need to override it, use something like the following:
.selector-for-some-widgetbox-sizing:content-box;>
With the above snippet, nested elements—including generated content via ::before and ::after —will all inherit the specified box-sizing for that .selector-for-some-widget .
Reboot
For improved cross-browser rendering, we use Reboot to correct inconsistencies across browsers and devices while providing slightly more opinionated resets to common HTML elements.
Community
Stay up-to-date on the development of Bootstrap and reach out to the community with these helpful resources.
Read and subscribe to The Official Bootstrap Blog.
Ask and explore our GitHub Discussions.
Chat with fellow Bootstrappers in IRC. On the irc.libera.chat server, in the #bootstrap channel.
Implementation help may be found at Stack Overflow (tagged bootstrap-5 ).
Developers should use the keyword bootstrap on packages that modify or add to the functionality of Bootstrap when distributing through npm or similar delivery mechanisms for maximum discoverability.
You can also follow @getbootstrap on Twitter for the latest gossip and awesome music videos.
Designed and built with all the love in the world by the Bootstrap team with the help of our contributors.