Glyphicons Available glyphs Includes over 250 glyphs in font format from the Glyphicon Halflings set. Glyphicons Halflings are normally not available for free, but their creator has made them available for Bootstrap free of cost. As a thank you, we only ask that you include a link back to Glyphicons whenever possible. glyphicon glyphicon-asterisk

glyphicon glyphicon-plus

glyphicon glyphicon-euro

glyphicon glyphicon-eur

glyphicon glyphicon-minus

glyphicon glyphicon-cloud

glyphicon glyphicon-envelope

glyphicon glyphicon-pencil

glyphicon glyphicon-glass

glyphicon glyphicon-music

glyphicon glyphicon-search

glyphicon glyphicon-heart

glyphicon glyphicon-star

glyphicon glyphicon-star-empty

glyphicon glyphicon-user

glyphicon glyphicon-film

glyphicon glyphicon-th-large

glyphicon glyphicon-th

glyphicon glyphicon-th-list

glyphicon glyphicon-ok

glyphicon glyphicon-remove

glyphicon glyphicon-zoom-in

glyphicon glyphicon-zoom-out

glyphicon glyphicon-off

glyphicon glyphicon-signal

glyphicon glyphicon-cog

glyphicon glyphicon-trash

glyphicon glyphicon-home

glyphicon glyphicon-file

glyphicon glyphicon-time

glyphicon glyphicon-road

glyphicon glyphicon-download-alt

glyphicon glyphicon-download

glyphicon glyphicon-upload

glyphicon glyphicon-inbox

glyphicon glyphicon-play-circle

glyphicon glyphicon-repeat

glyphicon glyphicon-refresh

glyphicon glyphicon-list-alt

glyphicon glyphicon-lock

glyphicon glyphicon-flag

glyphicon glyphicon-headphones

glyphicon glyphicon-volume-off

glyphicon glyphicon-volume-down

glyphicon glyphicon-volume-up

glyphicon glyphicon-qrcode

glyphicon glyphicon-barcode

glyphicon glyphicon-tag

glyphicon glyphicon-tags

glyphicon glyphicon-book

glyphicon glyphicon-bookmark

glyphicon glyphicon-print

glyphicon glyphicon-camera

glyphicon glyphicon-font

glyphicon glyphicon-bold

glyphicon glyphicon-italic

glyphicon glyphicon-text-height

glyphicon glyphicon-text-width

glyphicon glyphicon-align-left

glyphicon glyphicon-align-center

glyphicon glyphicon-align-right

glyphicon glyphicon-align-justify

glyphicon glyphicon-list

glyphicon glyphicon-indent-left

glyphicon glyphicon-indent-right

glyphicon glyphicon-facetime-video

glyphicon glyphicon-picture

glyphicon glyphicon-map-marker

glyphicon glyphicon-adjust

glyphicon glyphicon-tint

glyphicon glyphicon-edit

glyphicon glyphicon-share

glyphicon glyphicon-check

glyphicon glyphicon-move

glyphicon glyphicon-step-backward

glyphicon glyphicon-fast-backward

glyphicon glyphicon-backward

glyphicon glyphicon-play

glyphicon glyphicon-pause

glyphicon glyphicon-stop

glyphicon glyphicon-forward

glyphicon glyphicon-fast-forward

glyphicon glyphicon-step-forward

glyphicon glyphicon-eject

glyphicon glyphicon-chevron-left

glyphicon glyphicon-chevron-right

glyphicon glyphicon-plus-sign

glyphicon glyphicon-minus-sign

glyphicon glyphicon-remove-sign

glyphicon glyphicon-ok-sign

glyphicon glyphicon-question-sign

glyphicon glyphicon-info-sign

glyphicon glyphicon-screenshot

glyphicon glyphicon-remove-circle

glyphicon glyphicon-ok-circle

glyphicon glyphicon-ban-circle

glyphicon glyphicon-arrow-left

glyphicon glyphicon-arrow-right

glyphicon glyphicon-arrow-up

glyphicon glyphicon-arrow-down

glyphicon glyphicon-share-alt

glyphicon glyphicon-resize-full

glyphicon glyphicon-resize-small

glyphicon glyphicon-exclamation-sign

glyphicon glyphicon-gift

glyphicon glyphicon-leaf

glyphicon glyphicon-fire

glyphicon glyphicon-eye-open

glyphicon glyphicon-eye-close

glyphicon glyphicon-warning-sign

glyphicon glyphicon-plane

glyphicon glyphicon-calendar

glyphicon glyphicon-random

glyphicon glyphicon-comment

glyphicon glyphicon-magnet

glyphicon glyphicon-chevron-up

glyphicon glyphicon-chevron-down

glyphicon glyphicon-retweet

glyphicon glyphicon-shopping-cart

glyphicon glyphicon-folder-close

glyphicon glyphicon-folder-open

glyphicon glyphicon-resize-vertical

glyphicon glyphicon-resize-horizontal

glyphicon glyphicon-hdd

glyphicon glyphicon-bullhorn

glyphicon glyphicon-bell

glyphicon glyphicon-certificate

glyphicon glyphicon-thumbs-up

glyphicon glyphicon-thumbs-down

glyphicon glyphicon-hand-right

glyphicon glyphicon-hand-left

glyphicon glyphicon-hand-up

glyphicon glyphicon-hand-down

glyphicon glyphicon-circle-arrow-right

glyphicon glyphicon-circle-arrow-left

glyphicon glyphicon-circle-arrow-up

glyphicon glyphicon-circle-arrow-down

glyphicon glyphicon-globe

glyphicon glyphicon-wrench

glyphicon glyphicon-tasks

glyphicon glyphicon-filter

glyphicon glyphicon-briefcase

glyphicon glyphicon-fullscreen

glyphicon glyphicon-dashboard

glyphicon glyphicon-paperclip

glyphicon glyphicon-heart-empty

glyphicon glyphicon-link

glyphicon glyphicon-phone

glyphicon glyphicon-pushpin

glyphicon glyphicon-usd

glyphicon glyphicon-gbp

glyphicon glyphicon-sort

glyphicon glyphicon-sort-by-alphabet

glyphicon glyphicon-sort-by-alphabet-alt

glyphicon glyphicon-sort-by-order

glyphicon glyphicon-sort-by-order-alt

glyphicon glyphicon-sort-by-attributes

glyphicon glyphicon-sort-by-attributes-alt

glyphicon glyphicon-unchecked

glyphicon glyphicon-expand

glyphicon glyphicon-collapse-down

glyphicon glyphicon-collapse-up

glyphicon glyphicon-log-in

glyphicon glyphicon-flash

glyphicon glyphicon-log-out

glyphicon glyphicon-new-window

glyphicon glyphicon-record

glyphicon glyphicon-save

glyphicon glyphicon-open

glyphicon glyphicon-saved

glyphicon glyphicon-import

glyphicon glyphicon-export

glyphicon glyphicon-send

glyphicon glyphicon-floppy-disk

glyphicon glyphicon-floppy-saved

glyphicon glyphicon-floppy-remove

glyphicon glyphicon-floppy-save

glyphicon glyphicon-floppy-open

glyphicon glyphicon-credit-card

glyphicon glyphicon-transfer

glyphicon glyphicon-cutlery

glyphicon glyphicon-header

glyphicon glyphicon-compressed

glyphicon glyphicon-earphone

glyphicon glyphicon-phone-alt

glyphicon glyphicon-tower

glyphicon glyphicon-stats

glyphicon glyphicon-sd-video

glyphicon glyphicon-hd-video

glyphicon glyphicon-subtitles

glyphicon glyphicon-sound-stereo

glyphicon glyphicon-sound-dolby

glyphicon glyphicon-sound-5-1

glyphicon glyphicon-sound-6-1

glyphicon glyphicon-sound-7-1

glyphicon glyphicon-copyright-mark

glyphicon glyphicon-registration-mark

glyphicon glyphicon-cloud-download

glyphicon glyphicon-cloud-upload

glyphicon glyphicon-tree-conifer

glyphicon glyphicon-tree-deciduous

glyphicon glyphicon-cd

glyphicon glyphicon-save-file

glyphicon glyphicon-open-file

glyphicon glyphicon-level-up

glyphicon glyphicon-copy

glyphicon glyphicon-paste

glyphicon glyphicon-alert

glyphicon glyphicon-equalizer

glyphicon glyphicon-king

glyphicon glyphicon-queen

glyphicon glyphicon-pawn

glyphicon glyphicon-bishop

glyphicon glyphicon-knight

glyphicon glyphicon-baby-formula

glyphicon glyphicon-tent

glyphicon glyphicon-blackboard

glyphicon glyphicon-bed

glyphicon glyphicon-apple

glyphicon glyphicon-erase

glyphicon glyphicon-hourglass

glyphicon glyphicon-lamp

glyphicon glyphicon-duplicate

glyphicon glyphicon-piggy-bank

glyphicon glyphicon-scissors

glyphicon glyphicon-bitcoin

glyphicon glyphicon-btc

glyphicon glyphicon-xbt

glyphicon glyphicon-yen

glyphicon glyphicon-jpy

glyphicon glyphicon-ruble

glyphicon glyphicon-rub

glyphicon glyphicon-scale

glyphicon glyphicon-ice-lolly

glyphicon glyphicon-ice-lolly-tasted

glyphicon glyphicon-education

glyphicon glyphicon-option-horizontal

glyphicon glyphicon-option-vertical

glyphicon glyphicon-menu-hamburger

glyphicon glyphicon-modal-window

glyphicon glyphicon-oil

glyphicon glyphicon-grain

glyphicon glyphicon-sunglasses

glyphicon glyphicon-text-size

glyphicon glyphicon-text-color

glyphicon glyphicon-text-background

glyphicon glyphicon-object-align-top

glyphicon glyphicon-object-align-bottom

glyphicon glyphicon-object-align-horizontal

glyphicon glyphicon-object-align-left

glyphicon glyphicon-object-align-vertical

glyphicon glyphicon-object-align-right

glyphicon glyphicon-triangle-right

glyphicon glyphicon-triangle-left

glyphicon glyphicon-triangle-bottom

glyphicon glyphicon-triangle-top

glyphicon glyphicon-console

glyphicon glyphicon-superscript

glyphicon glyphicon-subscript

glyphicon glyphicon-menu-left

glyphicon glyphicon-menu-right

glyphicon glyphicon-menu-down

glyphicon glyphicon-menu-up How to use For performance reasons, all icons require a base class and individual icon class. To use, place the following code just about anywhere. Be sure to leave a space between the icon and text for proper padding. Don't mix with other components Icon classes cannot be directly combined with other components. They should not be used along with other classes on the same element. Instead, add a nested <span> and apply the icon classes to the <span> . Only for use on empty elements Icon classes should only be used on elements that contain no text content and have no child elements. Changing the icon font location Bootstrap assumes icon font files will be located in the ../fonts/ directory, relative to the compiled CSS files. Moving or renaming those font files means updating the CSS in one of three ways: Change the @icon-font-path and/or @icon-font-name variables in the source Less files.

and/or variables in the source Less files. Utilize the relative URLs option provided by the Less compiler.

Change the url() paths in the compiled CSS. Use whatever option best suits your specific development setup. Accessible icons Modern versions of assistive technologies will announce CSS generated content, as well as specific Unicode characters. To avoid unintended and confusing output in screen readers (particularly when icons are used purely for decoration), we hide them with the aria-hidden="true" attribute. If you're using an icon to convey meaning (rather than only as a decorative element), ensure that this meaning is also conveyed to assistive technologies – for instance, include additional content, visually hidden with the .sr-only class. If you're creating controls with no other text (such as a <button> that only contains an icon), you should always provide alternative content to identify the purpose of the control, so that it will make sense to users of assistive technologies. In this case, you could add an aria-label attribute on the control itself. <span class= "glyphicon glyphicon-search" aria-hidden= "true" ></span> Examples Use them in buttons, button groups for a toolbar, navigation, or prepended form inputs. Star Star Star Star <button type= "button" class= "btn btn-default" aria-label= "Left Align" > <span class= "glyphicon glyphicon-align-left" aria-hidden= "true" ></span> </button> <button type= "button" class= "btn btn-default btn-lg" > <span class= "glyphicon glyphicon-star" aria-hidden= "true" ></span> Star </button> An icon used in an alert to convey that it's an error message, with additional .sr-only text to convey this hint to users of assistive technologies. Error: Enter a valid email address <div class= "alert alert-danger" role= "alert" > <span class= "glyphicon glyphicon-exclamation-sign" aria-hidden= "true" ></span> <span class= "sr-only" > Error: </span> Enter a valid email address </div>

Button groups Group a series of buttons together on a single line with the button group. Add on optional JavaScript radio and checkbox style behavior with our buttons plugin. Tooltips & popovers in button groups require special setting When using tooltips or popovers on elements within a .btn-group , you'll have to specify the option container: 'body' to avoid unwanted side effects (such as the element growing wider and/or losing its rounded corners when the tooltip or popover is triggered). Ensure correct role and provide a label In order for assistive technologies – such as screen readers – to convey that a series of buttons is grouped, an appropriate role attribute needs to be provided. For button groups, this would be role="group" , while toolbars should have a role="toolbar" . One exception are groups which only contain a single control (for instance the justified button groups with <button> elements) or a dropdown. In addition, groups and toolbars should be given an explicit label, as most assistive technologies will otherwise not announce them, despite the presence of the correct role attribute. In the examples provided here, we use aria-label , but alternatives such as aria-labelledby can also be used. Basic example Wrap a series of buttons with .btn in .btn-group . Left Middle Right <div class= "btn-group" role= "group" aria-label= "..." > <button type= "button" class= "btn btn-default" > Left </button> <button type= "button" class= "btn btn-default" > Middle </button> <button type= "button" class= "btn btn-default" > Right </button> </div> Button toolbar Combine sets of <div class="btn-group"> into a <div class="btn-toolbar"> for more complex components. 1 2 3 4 5 6 7 8 <div class= "btn-toolbar" role= "toolbar" aria-label= "..." > <div class= "btn-group" role= "group" aria-label= "..." > ... </div> <div class= "btn-group" role= "group" aria-label= "..." > ... </div> <div class= "btn-group" role= "group" aria-label= "..." > ... </div> </div> Sizing Instead of applying button sizing classes to every button in a group, just add .btn-group-* to each .btn-group , including when nesting multiple groups. Left Middle Right

Left Middle Right

Left Middle Right

Left Middle Right <div class= "btn-group btn-group-lg" role= "group" aria-label= "..." > ... </div> <div class= "btn-group" role= "group" aria-label= "..." > ... </div> <div class= "btn-group btn-group-sm" role= "group" aria-label= "..." > ... </div> <div class= "btn-group btn-group-xs" role= "group" aria-label= "..." > ... </div> Nesting Place a .btn-group within another .btn-group when you want dropdown menus mixed with a series of buttons. 1 2 Dropdown Dropdown link

Dropdown link <div class= "btn-group" role= "group" aria-label= "..." > <button type= "button" class= "btn btn-default" > 1 </button> <button type= "button" class= "btn btn-default" > 2 </button> <div class= "btn-group" role= "group" > <button type= "button" class= "btn btn-default dropdown-toggle" data-toggle= "dropdown" aria-haspopup= "true" aria-expanded= "false" > Dropdown <span class= "caret" ></span> </button> <ul class= "dropdown-menu" > <li><a href= "#" > Dropdown link </a></li> <li><a href= "#" > Dropdown link </a></li> </ul> </div> </div> Vertical variation Make a set of buttons appear vertically stacked rather than horizontally. Split button dropdowns are not supported here. Button Button Dropdown Dropdown link

Dropdown link Button Button Dropdown Dropdown link

Dropdown link Dropdown Dropdown link

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Dropdown link <div class= "btn-group-vertical" role= "group" aria-label= "..." > ... </div> Justified button groups Make a group of buttons stretch at equal sizes to span the entire width of its parent. Also works with button dropdowns within the button group. Handling borders Due to the specific HTML and CSS used to justify buttons (namely display: table-cell ), the borders between them are doubled. In regular button groups, margin-left: -1px is used to stack the borders instead of removing them. However, margin doesn't work with display: table-cell . As a result, depending on your customizations to Bootstrap, you may wish to remove or re-color the borders. IE8 and borders Internet Explorer 8 doesn't render borders on buttons in a justified button group, whether it's on <a> or <button> elements. To get around that, wrap each button in another .btn-group . See #12476 for more information. With <a> elements Just wrap a series of .btn s in .btn-group.btn-group-justified . Left Middle Right

Left Middle Dropdown Action

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Separated link <div class= "btn-group btn-group-justified" role= "group" aria-label= "..." > ... </div> Links acting as buttons If the <a> elements are used to act as buttons – triggering in-page functionality, rather than navigating to another document or section within the current page – they should also be given an appropriate role="button" . With <button> elements To use justified button groups with <button> elements, you must wrap each button in a button group. Most browsers don't properly apply our CSS for justification to <button> elements, but since we support button dropdowns, we can work around that. Left Middle Right <div class= "btn-group btn-group-justified" role= "group" aria-label= "..." > <div class= "btn-group" role= "group" > <button type= "button" class= "btn btn-default" > Left </button> </div> <div class= "btn-group" role= "group" > <button type= "button" class= "btn btn-default" > Middle </button> </div> <div class= "btn-group" role= "group" > <button type= "button" class= "btn btn-default" > Right </button> </div> </div>

Input groups Extend form controls by adding text or buttons before, after, or on both sides of any text-based <input> . Use .input-group with an .input-group-addon or .input-group-btn to prepend or append elements to a single .form-control . Textual <input> s only Avoid using <select> elements here as they cannot be fully styled in WebKit browsers. Avoid using <textarea> elements here as their rows attribute will not be respected in some cases. Tooltips & popovers in input groups require special setting When using tooltips or popovers on elements within an .input-group , you'll have to specify the option container: 'body' to avoid unwanted side effects (such as the element growing wider and/or losing its rounded corners when the tooltip or popover is triggered). Don't mix with other components Do not mix form groups or grid column classes directly with input groups. Instead, nest the input group inside of the form group or grid-related element. Always add labels Screen readers will have trouble with your forms if you don't include a label for every input. For these input groups, ensure that any additional label or functionality is conveyed to assistive technologies. The exact technique to be used (visible <label> elements, <label> elements hidden using the .sr-only class, or use of the aria-label , aria-labelledby , aria-describedby , title or placeholder attribute) and what additional information will need to be conveyed will vary depending on the exact type of interface widget you're implementing. The examples in this section provide a few suggested, case-specific approaches. Basic example Place one add-on or button on either side of an input. You may also place one on both sides of an input. We do not support multiple add-ons ( .input-group-addon or .input-group-btn ) on a single side. We do not support multiple form-controls in a single input group. @

@example.com

$ .00

Your vanity URL https://example.com/users/ <div class= "input-group" > <span class= "input-group-addon" id= "basic-addon1" > @ </span> <input type= "text" class= "form-control" placeholder= "Username" aria-describedby= "basic-addon1" > </div> <div class= "input-group" > <input type= "text" class= "form-control" placeholder= "Recipient's username" aria-describedby= "basic-addon2" > <span class= "input-group-addon" id= "basic-addon2" > @example.com </span> </div> <div class= "input-group" > <span class= "input-group-addon" > $ </span> <input type= "text" class= "form-control" aria-label= "Amount (to the nearest dollar)" > <span class= "input-group-addon" > .00 </span> </div> <label for= "basic-url" > Your vanity URL </label> <div class= "input-group" > <span class= "input-group-addon" id= "basic-addon3" > https://example.com/users/ </span> <input type= "text" class= "form-control" id= "basic-url" aria-describedby= "basic-addon3" > </div> Sizing Add the relative form sizing classes to the .input-group itself and contents within will automatically resize—no need for repeating the form control size classes on each element. @

@

@ <div class= "input-group input-group-lg" > <span class= "input-group-addon" id= "sizing-addon1" > @ </span> <input type= "text" class= "form-control" placeholder= "Username" aria-describedby= "sizing-addon1" > </div> <div class= "input-group" > <span class= "input-group-addon" id= "sizing-addon2" > @ </span> <input type= "text" class= "form-control" placeholder= "Username" aria-describedby= "sizing-addon2" > </div> <div class= "input-group input-group-sm" > <span class= "input-group-addon" id= "sizing-addon3" > @ </span> <input type= "text" class= "form-control" placeholder= "Username" aria-describedby= "sizing-addon3" > </div> Checkboxes and radio addons Place any checkbox or radio option within an input group's addon instead of text. <div class= "row" > <div class= "col-lg-6" > <div class= "input-group" > <span class= "input-group-addon" > <input type= "checkbox" aria-label= "..." > </span> <input type= "text" class= "form-control" aria-label= "..." > </div> <!-- /input-group --> </div> <!-- /.col-lg-6 --> <div class= "col-lg-6" > <div class= "input-group" > <span class= "input-group-addon" > <input type= "radio" aria-label= "..." > </span> <input type= "text" class= "form-control" aria-label= "..." > </div> <!-- /input-group --> </div> <!-- /.col-lg-6 --> </div> <!-- /.row --> Button addons Buttons in input groups are a bit different and require one extra level of nesting. Instead of .input-group-addon , you'll need to use .input-group-btn to wrap the buttons. This is required due to default browser styles that cannot be overridden. Go! Go! <div class= "row" > <div class= "col-lg-6" > <div class= "input-group" > <span class= "input-group-btn" > <button class= "btn btn-default" type= "button" > Go! </button> </span> <input type= "text" class= "form-control" placeholder= "Search for..." > </div> <!-- /input-group --> </div> <!-- /.col-lg-6 --> <div class= "col-lg-6" > <div class= "input-group" > <input type= "text" class= "form-control" placeholder= "Search for..." > <span class= "input-group-btn" > <button class= "btn btn-default" type= "button" > Go! </button> </span> </div> <!-- /input-group --> </div> <!-- /.col-lg-6 --> </div> <!-- /.row --> Buttons with dropdowns Action Action

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Separated link Action Action

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Separated link <div class= "row" > <div class= "col-lg-6" > <div class= "input-group" > <div class= "input-group-btn" > <button type= "button" class= "btn btn-default dropdown-toggle" data-toggle= "dropdown" aria-haspopup= "true" aria-expanded= "false" > Action <span class= "caret" ></span></button> <ul class= "dropdown-menu" > <li><a href= "#" > Action </a></li> <li><a href= "#" > Another action </a></li> <li><a href= "#" > Something else here </a></li> <li role= "separator" class= "divider" ></li> <li><a href= "#" > Separated link </a></li> </ul> </div> <!-- /btn-group --> <input type= "text" class= "form-control" aria-label= "..." > </div> <!-- /input-group --> </div> <!-- /.col-lg-6 --> <div class= "col-lg-6" > <div class= "input-group" > <input type= "text" class= "form-control" aria-label= "..." > <div class= "input-group-btn" > <button type= "button" class= "btn btn-default dropdown-toggle" data-toggle= "dropdown" aria-haspopup= "true" aria-expanded= "false" > Action <span class= "caret" ></span></button> <ul class= "dropdown-menu dropdown-menu-right" > <li><a href= "#" > Action </a></li> <li><a href= "#" > Another action </a></li> <li><a href= "#" > Something else here </a></li> <li role= "separator" class= "divider" ></li> <li><a href= "#" > Separated link </a></li> </ul> </div> <!-- /btn-group --> </div> <!-- /input-group --> </div> <!-- /.col-lg-6 --> </div> <!-- /.row --> Segmented buttons Action Toggle Dropdown Action

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Separated link Action Toggle Dropdown Action

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Separated link <div class= "input-group" > <div class= "input-group-btn" > <!-- Button and dropdown menu --> </div> <input type= "text" class= "form-control" aria-label= "..." > </div> <div class= "input-group" > <input type= "text" class= "form-control" aria-label= "..." > <div class= "input-group-btn" > <!-- Button and dropdown menu --> </div> </div> Multiple buttons While you can only have one add-on per side, you can have multiple buttons inside a single .input-group-btn . Action <div class= "input-group" > <div class= "input-group-btn" > <!-- Buttons --> </div> <input type= "text" class= "form-control" aria-label= "..." > </div> <div class= "input-group" > <input type= "text" class= "form-control" aria-label= "..." > <div class= "input-group-btn" > <!-- Buttons --> </div> </div>

Navbars are responsive meta components that serve as navigation headers for your application or site. They begin collapsed (and are toggleable) in mobile views and become horizontal as the available viewport width increases. Justified navbar nav links are currently not supported. <nav class= "navbar navbar-default" > <div class= "container-fluid" > <!-- Brand and toggle get grouped for better mobile display --> <div class= "navbar-header" > <button type= "button" class= "navbar-toggle collapsed" data-toggle= "collapse" data-target= "#bs-example-navbar-collapse-1" aria-expanded= "false" > <span class= "sr-only" > Toggle navigation </span> <span class= "icon-bar" ></span> <span class= "icon-bar" ></span> <span class= "icon-bar" ></span> </button> <a class= "navbar-brand" href= "#" > Brand </a> </div> <!-- Collect the nav links, forms, and other content for toggling --> <div class= "collapse navbar-collapse" id= "bs-example-navbar-collapse-1" > <ul class= "nav navbar-nav" > <li class= "active" ><a href= "#" > Link <span class= "sr-only" > (current) </span></a></li> <li><a href= "#" > Link </a></li> <li class= "dropdown" > <a href= "#" class= "dropdown-toggle" data-toggle= "dropdown" role= "button" aria-haspopup= "true" aria-expanded= "false" > Dropdown <span class= "caret" ></span></a> <ul class= "dropdown-menu" > <li><a href= "#" > Action </a></li> <li><a href= "#" > Another action </a></li> <li><a href= "#" > Something else here </a></li> <li role= "separator" class= "divider" ></li> <li><a href= "#" > Separated link </a></li> <li role= "separator" class= "divider" ></li> <li><a href= "#" > One more separated link </a></li> </ul> </li> </ul> <form class= "navbar-form navbar-left" > <div class= "form-group" > <input type= "text" class= "form-control" placeholder= "Search" > </div> <button type= "submit" class= "btn btn-default" > Submit </button> </form> <ul class= "nav navbar-nav navbar-right" > <li><a href= "#" > Link </a></li> <li class= "dropdown" > <a href= "#" class= "dropdown-toggle" data-toggle= "dropdown" role= "button" aria-haspopup= "true" aria-expanded= "false" > Dropdown <span class= "caret" ></span></a> <ul class= "dropdown-menu" > <li><a href= "#" > Action </a></li> <li><a href= "#" > Another action </a></li> <li><a href= "#" > Something else here </a></li> <li role= "separator" class= "divider" ></li> <li><a href= "#" > Separated link </a></li> </ul> </li> </ul> </div> <!-- /.navbar-collapse --> </div> <!-- /.container-fluid --> </nav> Replace the navbar brand with your own image by swapping the text for an <img> . Since the .navbar-brand has its own padding and height, you may need to override some CSS depending on your image. <nav class= "navbar navbar-default" > <div class= "container-fluid" > <div class= "navbar-header" > <a class= "navbar-brand" href= "#" > <img alt= "Brand" src= "..." > </a> </div> </div> </nav> Place form content within .navbar-form for proper vertical alignment and collapsed behavior in narrow viewports. Use the alignment options to decide where it resides within the navbar content. As a heads up, .navbar-form shares much of its code with .form-inline via mixin. Some form controls, like input groups, may require fixed widths to be show up properly within a navbar. <form class= "navbar-form navbar-left" role= "search" > <div class= "form-group" > <input type= "text" class= "form-control" placeholder= "Search" > </div> <button type= "submit" class= "btn btn-default" > Submit </button> </form> Add the .navbar-btn class to <button> elements not residing in a <form> to vertically center them in the navbar. <button type= "button" class= "btn btn-default navbar-btn" > Sign in </button> Wrap strings of text in an element with .navbar-text , usually on a <p> tag for proper leading and color. <p class= "navbar-text" > Signed in as Mark Otto </p> For folks using standard links that are not within the regular navbar navigation component, use the .navbar-link class to add the proper colors for the default and inverse navbar options. <p class= "navbar-text navbar-right" > Signed in as <a href= "#" class= "navbar-link" > Mark Otto </a></p> Align nav links, forms, buttons, or text, using the .navbar-left or .navbar-right utility classes. Both classes will add a CSS float in the specified direction. For example, to align nav links, put them in a separate <ul> with the respective utility class applied. These classes are mixin-ed versions of .pull-left and .pull-right , but they're scoped to media queries for easier handling of navbar components across device sizes. Add .navbar-fixed-top and include a .container or .container-fluid to center and pad navbar content. <nav class= "navbar navbar-default navbar-fixed-top" > <div class= "container" > ... </div> </nav> Add .navbar-fixed-bottom and include a .container or .container-fluid to center and pad navbar content. <nav class= "navbar navbar-default navbar-fixed-bottom" > <div class= "container" > ... </div> </nav> Create a full-width navbar that scrolls away with the page by adding .navbar-static-top and include a .container or .container-fluid to center and pad navbar content. Unlike the .navbar-fixed-* classes, you do not need to change any padding on the body . <nav class= "navbar navbar-default navbar-static-top" > <div class= "container" > ... </div> </nav> Modify the look of the navbar by adding .navbar-inverse . <nav class= "navbar navbar-inverse" > ... </nav>

Indicate the current page's location within a navigational hierarchy. Separators are automatically added in CSS through :before and content . Home Home Library Home Library Data <ol class= "breadcrumb" > <li><a href= "#" > Home </a></li> <li><a href= "#" > Library </a></li> <li class= "active" > Data </li> </ol>

Labels Example Example heading New Example heading New Example heading New Example heading New Example heading New Example heading New <h3> Example heading <span class= "label label-default" > New </span></h3> Available variations Add any of the below mentioned modifier classes to change the appearance of a label. Default Primary Success Info Warning Danger <span class= "label label-default" > Default </span> <span class= "label label-primary" > Primary </span> <span class= "label label-success" > Success </span> <span class= "label label-info" > Info </span> <span class= "label label-warning" > Warning </span> <span class= "label label-danger" > Danger </span> Have tons of labels? Rendering problems can arise when you have dozens of inline labels within a narrow container, each containing its own inline-block element (like an icon). The way around this is setting display: inline-block; . For context and an example, see #13219.

Badges Easily highlight new or unread items by adding a <span class="badge"> to links, Bootstrap navs, and more. Inbox 42



Messages 4 <a href= "#" > Inbox <span class= "badge" > 42 </span></a> <button class= "btn btn-primary" type= "button" > Messages <span class= "badge" > 4 </span> </button> Self collapsing When there are no new or unread items, badges will simply collapse (via CSS's :empty selector) provided no content exists within. Cross-browser compatibility Badges won't self collapse in Internet Explorer 8 because it lacks support for the :empty selector. Adapts to active nav states Built-in styles are included for placing badges in active states in pill navigations. Home 42

Profile

Messages 3 <ul class= "nav nav-pills" role= "tablist" > <li role= "presentation" class= "active" ><a href= "#" > Home <span class= "badge" > 42 </span></a></li> <li role= "presentation" ><a href= "#" > Profile </a></li> <li role= "presentation" ><a href= "#" > Messages <span class= "badge" > 3 </span></a></li> </ul>

Jumbotron A lightweight, flexible component that can optionally extend the entire viewport to showcase key content on your site. Hello, world! This is a simple hero unit, a simple jumbotron-style component for calling extra attention to featured content or information. Learn more <div class= "jumbotron" > <h1> Hello, world! </h1> <p> ... </p> <p><a class= "btn btn-primary btn-lg" href= "#" role= "button" > Learn more </a></p> </div> To make the jumbotron full width, and without rounded corners, place it outside all .container s and instead add a .container within. <div class= "jumbotron" > <div class= "container" > ... </div> </div>

Page header A simple shell for an h1 to appropriately space out and segment sections of content on a page. It can utilize the h1 's default small element, as well as most other components (with additional styles). Example page header Subtext for header <div class= "page-header" > <h1> Example page header <small> Subtext for header </small></h1> </div>

Thumbnails Extend Bootstrap's grid system with the thumbnail component to easily display grids of images, videos, text, and more. If you're looking for Pinterest-like presentation of thumbnails of varying heights and/or widths, you'll need to use a third-party plugin such as Masonry, Isotope, or Salvattore. Default example By default, Bootstrap's thumbnails are designed to showcase linked images with minimal required markup. <div class= "row" > <div class= "col-xs-6 col-md-3" > <a href= "#" class= "thumbnail" > <img src= "..." alt= "..." > </a> </div> ... </div> Custom content With a bit of extra markup, it's possible to add any kind of HTML content like headings, paragraphs, or buttons into thumbnails. <div class= "row" > <div class= "col-sm-6 col-md-4" > <div class= "thumbnail" > <img src= "..." alt= "..." > <div class= "caption" > <h3> Thumbnail label </h3> <p> ... </p> <p><a href= "#" class= "btn btn-primary" role= "button" > Button </a> <a href= "#" class= "btn btn-default" role= "button" > Button </a></p> </div> </div> </div> </div>

Alerts Provide contextual feedback messages for typical user actions with the handful of available and flexible alert messages. Examples Wrap any text and an optional dismiss button in .alert and one of the four contextual classes (e.g., .alert-success ) for basic alert messages. No default class Alerts don't have default classes, only base and modifier classes. A default gray alert doesn't make too much sense, so you're required to specify a type via contextual class. Choose from success, info, warning, or danger. Well done! You successfully read this important alert message. Heads up! This alert needs your attention, but it's not super important. Warning! Better check yourself, you're not looking too good. Oh snap! Change a few things up and try submitting again. <div class= "alert alert-success" role= "alert" > ... </div> <div class= "alert alert-info" role= "alert" > ... </div> <div class= "alert alert-warning" role= "alert" > ... </div> <div class= "alert alert-danger" role= "alert" > ... </div> Dismissible alerts Build on any alert by adding an optional .alert-dismissible and close button. Requires JavaScript alert plugin For fully functioning, dismissible alerts, you must use the alerts JavaScript plugin. × Warning! Better check yourself, you're not looking too good. <div class= "alert alert-warning alert-dismissible" role= "alert" > <button type= "button" class= "close" data-dismiss= "alert" aria-label= "Close" ><span aria-hidden= "true" > × </span></button> <strong> Warning! </strong> Better check yourself, you're not looking too good. </div> Ensure proper behavior across all devices Be sure to use the <button> element with the data-dismiss="alert" data attribute. Use the .alert-link utility class to quickly provide matching colored links within any alert. Well done! You successfully read You successfully read this important alert message Heads up! This This alert needs your attention , but it's not super important. Warning! Better check yourself, you're Better check yourself, you're not looking too good Oh snap! Change a few things up and try submitting again. <div class= "alert alert-success" role= "alert" > <a href= "#" class= "alert-link" > ... </a> </div> <div class= "alert alert-info" role= "alert" > <a href= "#" class= "alert-link" > ... </a> </div> <div class= "alert alert-warning" role= "alert" > <a href= "#" class= "alert-link" > ... </a> </div> <div class= "alert alert-danger" role= "alert" > <a href= "#" class= "alert-link" > ... </a> </div>

Progress bars Provide up-to-date feedback on the progress of a workflow or action with simple yet flexible progress bars. Cross-browser compatibility Progress bars use CSS3 transitions and animations to achieve some of their effects. These features are not supported in Internet Explorer 9 and below or older versions of Firefox. Opera 12 does not support animations. Content Security Policy (CSP) compatibility If your website has a Content Security Policy (CSP) which doesn't allow style-src 'unsafe-inline' , then you won't be able to use inline style attributes to set progress bar widths as shown in our examples below. Alternative methods for setting the widths that are compatible with strict CSPs include using a little custom JavaScript (that sets element.style.width ) or using custom CSS classes. Basic example Default progress bar. 60% Complete <div class= "progress" > <div class= "progress-bar" role= "progressbar" aria-valuenow= "60" aria-valuemin= "0" aria-valuemax= "100" style= "width: 60%;" > <span class= "sr-only" > 60% Complete </span> </div> </div> With label Remove the <span> with .sr-only class from within the progress bar to show a visible percentage. 60% <div class= "progress" > <div class= "progress-bar" role= "progressbar" aria-valuenow= "60" aria-valuemin= "0" aria-valuemax= "100" style= "width: 60%;" > 60% </div> </div> To ensure that the label text remains legible even for low percentages, consider adding a min-width to the progress bar. 0% 2% <div class= "progress" > <div class= "progress-bar" role= "progressbar" aria-valuenow= "0" aria-valuemin= "0" aria-valuemax= "100" style= "min-width: 2em;" > 0% </div> </div> <div class= "progress" > <div class= "progress-bar" role= "progressbar" aria-valuenow= "2" aria-valuemin= "0" aria-valuemax= "100" style= "min-width: 2em; width: 2%;" > 2% </div> </div> Contextual alternatives Progress bars use some of the same button and alert classes for consistent styles. 40% Complete (success) 20% Complete 60% Complete (warning) 80% Complete (danger) <div class= "progress" > <div class= "progress-bar progress-bar-success" role= "progressbar" aria-valuenow= "40" aria-valuemin= "0" aria-valuemax= "100" style= "width: 40%" > <span class= "sr-only" > 40% Complete (success) </span> </div> </div> <div class= "progress" > <div class= "progress-bar progress-bar-info" role= "progressbar" aria-valuenow= "20" aria-valuemin= "0" aria-valuemax= "100" style= "width: 20%" > <span class= "sr-only" > 20% Complete </span> </div> </div> <div class= "progress" > <div class= "progress-bar progress-bar-warning" role= "progressbar" aria-valuenow= "60" aria-valuemin= "0" aria-valuemax= "100" style= "width: 60%" > <span class= "sr-only" > 60% Complete (warning) </span> </div> </div> <div class= "progress" > <div class= "progress-bar progress-bar-danger" role= "progressbar" aria-valuenow= "80" aria-valuemin= "0" aria-valuemax= "100" style= "width: 80%" > <span class= "sr-only" > 80% Complete (danger) </span> </div> </div> Striped Uses a gradient to create a striped effect. Not available in IE9 and below. 40% Complete (success) 20% Complete 60% Complete (warning) 80% Complete (danger) <div class= "progress" > <div class= "progress-bar progress-bar-success progress-bar-striped" role= "progressbar" aria-valuenow= "40" aria-valuemin= "0" aria-valuemax= "100" style= "width: 40%" > <span class= "sr-only" > 40% Complete (success) </span> </div> </div> <div class= "progress" > <div class= "progress-bar progress-bar-info progress-bar-striped" role= "progressbar" aria-valuenow= "20" aria-valuemin= "0" aria-valuemax= "100" style= "width: 20%" > <span class= "sr-only" > 20% Complete </span> </div> </div> <div class= "progress" > <div class= "progress-bar progress-bar-warning progress-bar-striped" role= "progressbar" aria-valuenow= "60" aria-valuemin= "0" aria-valuemax= "100" style= "width: 60%" > <span class= "sr-only" > 60% Complete (warning) </span> </div> </div> <div class= "progress" > <div class= "progress-bar progress-bar-danger progress-bar-striped" role= "progressbar" aria-valuenow= "80" aria-valuemin= "0" aria-valuemax= "100" style= "width: 80%" > <span class= "sr-only" > 80% Complete (danger) </span> </div> </div> Animated Add .active to .progress-bar-striped to animate the stripes right to left. Not available in IE9 and below. 45% Complete Toggle animation <div class= "progress" > <div class= "progress-bar progress-bar-striped active" role= "progressbar" aria-valuenow= "45" aria-valuemin= "0" aria-valuemax= "100" style= "width: 45%" > <span class= "sr-only" > 45% Complete </span> </div> </div> Stacked Place multiple bars into the same .progress to stack them. 35% Complete (success) 20% Complete (warning) 10% Complete (danger) <div class= "progress" > <div class= "progress-bar progress-bar-success" style= "width: 35%" > <span class= "sr-only" > 35% Complete (success) </span> </div> <div class= "progress-bar progress-bar-warning progress-bar-striped" style= "width: 20%" > <span class= "sr-only" > 20% Complete (warning) </span> </div> <div class= "progress-bar progress-bar-danger" style= "width: 10%" > <span class= "sr-only" > 10% Complete (danger) </span> </div> </div>

Media object Abstract object styles for building various types of components (like blog comments, Tweets, etc) that feature a left- or right-aligned image alongside textual content. Default media The default media displays a media object (images, video, audio) to the left or right of a content block. Media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus. Media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus. Nested media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus. Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus. Media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. <div class= "media" > <div class= "media-left" > <a href= "#" > <img class= "media-object" src= "..." alt= "..." > </a> </div> <div class= "media-body" > <h4 class= "media-heading" > Media heading </h4> ... </div> </div> The classes .pull-left and .pull-right also exist and were previously used as part of the media component, but are deprecated for that use as of v3.3.0. They are approximately equivalent to .media-left and .media-right , except that .media-right should be placed after the .media-body in the html. Media alignment The images or other media can be aligned top, middle, or bottom. The default is top aligned. Top aligned media Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus. Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Middle aligned media Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus. Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Bottom aligned media Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Fusce condimentum nunc ac nisi vulputate fringilla. Donec lacinia congue felis in faucibus. Donec sed odio dui. Nullam quis risus eget urna mollis ornare vel eu leo. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. <div class= "media" > <div class= "media-left media-middle" > <a href= "#" > <img class= "media-object" src= "..." alt= "..." > </a> </div> <div class= "media-body" > <h4 class= "media-heading" > Middle aligned media </h4> ... </div> </div> Media list With a bit of extra markup, you can use media inside list (useful for comment threads or articles lists). Media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Nested media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Nested media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. Nested media heading Cras sit amet nibh libero, in gravida nulla. Nulla vel metus scelerisque ante sollicitudin commodo. Cras purus odio, vestibulum in vulputate at, tempus viverra turpis. <ul class= "media-list" > <li class= "media" > <div class= "media-left" > <a href= "#" > <img class= "media-object" src= "..." alt= "..." > </a> </div> <div class= "media-body" > <h4 class= "media-heading" > Media heading </h4> ... </div> </li> </ul>

Panels While not always necessary, sometimes you need to put your DOM in a box. For those situations, try the panel component. Basic example By default, all the .panel does is apply some basic border and padding to contain some content. Basic panel example <div class= "panel panel-default" > <div class= "panel-body" > Basic panel example </div> </div> Panel with heading Easily add a heading container to your panel with .panel-heading . You may also include any <h1> - <h6> with a .panel-title class to add a pre-styled heading. However, the font sizes of <h1> - <h6> are overridden by .panel-heading . For proper link coloring, be sure to place links in headings within .panel-title . Panel heading without title Panel content Panel title Panel content <div class= "panel panel-default" > <div class= "panel-heading" > Panel heading without title </div> <div class= "panel-body" > Panel content </div> </div> <div class= "panel panel-default" > <div class= "panel-heading" > <h3 class= "panel-title" > Panel title </h3> </div> <div class= "panel-body" > Panel content </div> </div> Wrap buttons or secondary text in .panel-footer . Note that panel footers do not inherit colors and borders when using contextual variations as they are not meant to be in the foreground. Panel content <div class= "panel panel-default" > <div class= "panel-body" > Panel content </div> <div class= "panel-footer" > Panel footer </div> </div> Contextual alternatives Like other components, easily make a panel more meaningful to a particular context by adding any of the contextual state classes. Panel title Panel content Panel title Panel content Panel title Panel content Panel title Panel content Panel title Panel content <div class= "panel panel-primary" > ... </div> <div class= "panel panel-success" > ... </div> <div class= "panel panel-info" > ... </div> <div class= "panel panel-warning" > ... </div> <div class= "panel panel-danger" > ... </div> With tables Add any non-bordered .table within a panel for a seamless design. If there is a .panel-body , we add an extra border to the top of the table for separation. Panel heading Some default panel content here. Nulla vitae elit libero, a pharetra augue. Aenean lacinia bibendum nulla sed consectetur. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum. Nullam id dolor id nibh ultricies vehicula ut id elit. # First Name Last Name Username 1 Mark Otto @mdo 2 Jacob Thornton @fat 3 Larry the Bird @twitter <div class= "panel panel-default" > <!-- Default panel contents --> <div class= "panel-heading" > Panel heading </div> <div class= "panel-body" > <p> ... </p> </div> <!-- Table --> <table class= "table" > ... </table> </div> If there is no panel body, the component moves from panel header to table without interruption. Panel heading # First Name Last Name Username 1 Mark Otto @mdo 2 Jacob Thornton @fat 3 Larry the Bird @twitter <div class= "panel panel-default" > <!-- Default panel contents --> <div class= "panel-heading" > Panel heading </div> <!-- Table --> <table class= "table" > ... </table> </div> With list groups Easily include full-width list groups within any panel. Panel heading Some default panel content here. Nulla vitae elit libero, a pharetra augue. Aenean lacinia bibendum nulla sed consectetur. Aenean eu leo quam. Pellentesque ornare sem lacinia quam venenatis vestibulum. Nullam id dolor id nibh ultricies vehicula ut id elit. Cras justo odio

Dapibus ac facilisis in

Morbi leo risus

Porta ac consectetur ac

Vestibulum at eros <div class= "panel panel-default" > <!-- Default panel contents --> <div class= "panel-heading" > Panel heading </div> <div class= "panel-body" > <p> ... </p> </div> <!-- List group --> <ul class= "list-group" > <li class= "list-group-item" > Cras justo odio </li> <li class= "list-group-item" > Dapibus ac facilisis in </li> <li class= "list-group-item" > Morbi leo risus </li> <li class= "list-group-item" > Porta ac consectetur ac </li> <li class= "list-group-item" > Vestibulum at eros </li> </ul> </div>

Responsive embed Allow browsers to determine video or slideshow dimensions based on the width of their containing block by creating an intrinsic ratio that will properly scale on any device. Rules are directly applied to <iframe> , <embed> , <video> , and <object> elements; optionally use an explicit descendant class .embed-responsive-item when you want to match the styling for other attributes. Pro-Tip! You don't need to include frameborder="0" in your <iframe> s as we override that for you. <!-- 16:9 aspect ratio --> <div class= "embed-responsive embed-responsive-16by9" > <iframe class= "embed-responsive-item" src= "..." ></iframe> </div> <!-- 4:3 aspect ratio --> <div class= "embed-responsive embed-responsive-4by3" > <iframe class= "embed-responsive-item" src= "..." ></iframe> </div>