Navbar a ni
Bootstrap-a navigation header chak tak, chhanna pe thei, navbar atana documentation leh entirnan. Branding, navigation, collapse plugin leh a dangte support a keng tel bawk.
A hnathawh dan
Navbar i hman tan hmaa i hriat tur chu hetiang hi a ni:
- Navbars hian responsive collapsing leh color scheme class hrang hrang atan wrapping
.navbar
with a mamawh a..navbar-expand{-sm|-md|-lg|-xl}
- Navbar leh a chhunga thil awmte hi default-in fluid a ni. An horizontal width tihtlem nan optional container hmang ang che .
- Navbar chhunga spacing leh alignment control nan kan spacing leh flex utility class te hmang rawh.
- Navbars hi default-in a chhang thei a, mahse chu chu i thlak danglam theih nan awlsam takin i siam danglam thei bawk. Responsive behavior hi kan Collapse JavaScript plugin ah a innghat a ni.
- Navbar te hi print laiin default in a thup thin. Print turin nawr luih tir la
.d-print
,.navbar
. Display utility class chu en rawh . - Element hmangin accessibility ensure
<nav>
emaw, a ang chi element generic zawk hman a nih chuan navbar tinah<div>
a dah belh la, assistive technology hmangtute tan landmark region anga chiang taka hriat theih nan.role="navigation"
prefers-reduced-motion
media query ah a innghat a ni. Kan accessibility documentation a reduced motion tih hi en la
.
Supported content a awm bawk
Navbars ah hian sub-component tlemte tan built-in support a awm a. A tul angin a hnuaia mi zingah hian thlang rawh:
.navbar-brand
i company, i thil siam, i project hming atan..navbar-nav
full-height leh lightweight navigation atan (dropdown support te pawh a tel)..navbar-toggler
kan collapse plugin leh navigation toggling behavior dangte nena hman tur..form-inline
eng form control leh thiltih pawh atan..navbar-text
thuziak vertically centered string dah belh nan..collapse.navbar-collapse
parent breakpoint hmanga navbar contents group leh thup nan.
Hetah hian responsive light-themed navbar-a sub-component awm zawng zawng entir nan kan rawn tarlang e, chu chu lg
(large) breakpoint-ah automatic-in a collapse vek a ni.
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarSupportedContent">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-toggle="dropdown" aria-expanded="false">
Dropdown
</a>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<div class="dropdown-divider"></div>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
He entirnan hian color ( bg-light
) leh spacing ( my-2
, my-lg-0
, mr-sm-0
, my-sm-0
) utility class te a hmang a.
Chhinchhiah
The hi .navbar-brand
element tam zawkah hman theih a ni a, mahse anchor hian hna a thawk tha ber a, element thenkhatah chuan utility class emaw custom style emaw a ngai mai thei.
<!-- As a link -->
<nav class="navbar navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
</nav>
<!-- As a heading -->
<nav class="navbar navbar-light bg-light">
<span class="navbar-brand mb-0 h1">Navbar</span>
</nav>
Image-a dah belh tur .navbar-brand
chuan custom style emaw utilities emaw a mamawh reng mai thei a, chu chu a size dik tak a nih theih nan a ni. Entirnan entir tur thenkhat chu hetiang hi a ni.
<!-- Just an image -->
<nav class="navbar navbar-light bg-light">
<a class="navbar-brand" href="#">
<img src="/docs/4.6/assets/brand/bootstrap-solid.svg" width="30" height="30" alt="">
</a>
</nav>
<!-- Image and text -->
<nav class="navbar navbar-light bg-light">
<a class="navbar-brand" href="#">
<img src="/docs/4.6/assets/brand/bootstrap-solid.svg" width="30" height="30" class="d-inline-block align-top" alt="">
Bootstrap
</a>
</nav>
Nav
Navbar navigation link te hian kan .nav
option te hmangin anmahni modifier class hmangin an siam a, responsive styling dik tak neih nan toggler class hman a ngai a ni. Navbar-a navigation pawh a lo thang lian ang a, i navbar chhunga thu awmte chu him taka a inmil theih nan horizontal space a tam thei ang ber luah turin a pung ang.
Active states—with .active
—to indicate the current page chu .nav-link
s emaw an nu leh pa hnai ber s emaw hnenah direct-in hman theih a .nav-item
ni.
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNav">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Features</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Pricing</a>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
</div>
</nav>
Tin, kan navs atan class kan hman avangin i duh chuan list-based approach hi i pumpelh vek thei bawk.
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavAltMarkup" aria-controls="navbarNavAltMarkup" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNavAltMarkup">
<div class="navbar-nav">
<a class="nav-link active" href="#">Home <span class="sr-only">(current)</span></a>
<a class="nav-link" href="#">Features</a>
<a class="nav-link" href="#">Pricing</a>
<a class="nav-link disabled">Disabled</a>
</div>
</div>
</nav>
I navbar ah dropdown te pawh i hmang thei bawk. Dropdown menu-ah hian positioning atan wrapping element a ngai a, chuvangin a hnuaia tarlan ang hian element hrang hrang leh nested element hmang ngei ang che .nav-item
..nav-link
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarNavDropdown" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarNavDropdown">
<ul class="navbar-nav">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Features</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Pricing</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-toggle="dropdown" aria-expanded="false">
Dropdown link
</a>
<div class="dropdown-menu">
<a class="dropdown-item" href="#">Action</a>
<a class="dropdown-item" href="#">Another action</a>
<a class="dropdown-item" href="#">Something else here</a>
</div>
</li>
</ul>
</div>
</nav>
Form hrang hrang
Navbar chhungah form control leh component hrang hrang dah la, .form-inline
.
<nav class="navbar navbar-light bg-light">
<form class="form-inline">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</nav>
Immediately child elements of .navbar
use flex layout leh default ah a awm ang justify-content: space-between
. Hetiang thiltih hi siamrem nan a tul angin flex utility dang hmang bawk ang che .
<nav class="navbar navbar-light bg-light">
<a class="navbar-brand">Navbar</a>
<form class="form-inline">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</nav>
Input group te pawhin hna an thawk a:
<nav class="navbar navbar-light bg-light">
<form class="form-inline">
<div class="input-group">
<div class="input-group-prepend">
<span class="input-group-text" id="basic-addon1">@</span>
</div>
<input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="basic-addon1">
</div>
</form>
</nav>
Heng navbar form hrang hrangah hian button hrang hrang a support bawk. Hei hi vertical alignment utilities hmangin element size hrang hrang align theih a nih thu pawh hriat nawn tirtu ropui tak a ni.
<nav class="navbar navbar-light bg-light">
<form class="form-inline">
<button class="btn btn-outline-success" type="button">Main button</button>
<button class="btn btn-sm btn-outline-secondary" type="button">Smaller button</button>
</form>
</nav>
Thumal
Navbars ah hian bits of text a awm thei a, chu chu .navbar-text
. He class hian text string hrang hrangte tan vertical alignment leh horizontal spacing a siamrem thin.
<nav class="navbar navbar-light bg-light">
<span class="navbar-text">
Navbar text with an inline element
</span>
</nav>
A tul angin component leh utility dang nen mix leh match rawh.
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar w/ text</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarText" aria-controls="navbarText" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarText">
<ul class="navbar-nav mr-auto">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Features</a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Pricing</a>
</li>
</ul>
<span class="navbar-text">
Navbar text with an inline element
</span>
</div>
</nav>
Color scheme hrang hrang te
background-color
Theming class leh utilities te inzawmkhawm avang hian navbar theming hi a awlsam ngai lo . .navbar-light
Background rawng eng tak tak nena hman tur, a nih loh leh background rawng dum nena hman tur atang hian thlang rawh .navbar-dark
. .bg-*
Tichuan, utilities hmangin customize rawh.
<nav class="navbar navbar-dark bg-dark">
<!-- Navbar content -->
</nav>
<nav class="navbar navbar-dark bg-primary">
<!-- Navbar content -->
</nav>
<nav class="navbar navbar-light" style="background-color: #e3f2fd;">
<!-- Navbar content -->
</nav>
Container te pawh a awm
.container
A ngai lo nain , page pakhata center turin navbar chu a-ah i wrap thei bawk. A nih loh leh fixed emaw static top navbar.navbar
chhunga thil awmte chu center-ah chauh dah turin container chhungah i dah thei bawk.
<div class="container">
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
</nav>
</div>
.navbar-expand{-sm|-md|-lg|-xl}
Container chu i navbar chhunga a awm chuan a horizontal padding chu i class tarlan aia breakpoint hniam zawkah a chhuak thin. Hei hian i navbar a collaps laiin lower viewport-ah a tul lo taka padding kan doubling lo tih a tichiang a ni.
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container">
<a class="navbar-brand" href="#">Navbar</a>
</div>
</nav>
Hmun dahna tur
Kan position utilities hmangin navbar te chu non-static position ah dah rawh. Fixed to the top, fixed to the bottom, or stickied to the top atang hian thlang rawh (page chu a chung a thlen thlengin a scroll a, chutah chuan a awm reng ang). Fixed navbars use position: fixed
, chu chu DOM-a normal flow atanga lak chhuah an ni tihna a ni a, element dangte nena overlap loh nan custom CSS (eg, padding-top
on the ) a mamawh thei bawk.<body>
Tin , a .sticky-top
hmang tih pawh hre bawk ang che position: sticky
, chu chu browser tin ah a support kim lo .
<nav class="navbar navbar-light bg-light">
<a class="navbar-brand" href="#">Default</a>
</nav>
<nav class="navbar fixed-top navbar-light bg-light">
<a class="navbar-brand" href="#">Fixed top</a>
</nav>
<nav class="navbar fixed-bottom navbar-light bg-light">
<a class="navbar-brand" href="#">Fixed bottom</a>
</nav>
<nav class="navbar sticky-top navbar-light bg-light">
<a class="navbar-brand" href="#">Sticky top</a>
</nav>
Scroll a ni
Navbar collapsed-a toggleable contents chhunga vertical scrolling awm theihna .navbar-nav-scroll
turin a .navbar-collapse
(or navbar sub-component dang) ah dah rawh. Default-ah chuan scrolling chu 75vh
(or viewport height 75%)-ah a kick in a, mahse chu chu inline emaw custom style emaw hmangin i override thei thung. Viewport lian zawkah chuan navbar tihzauh a nih chuan default navbar-a a lan angin content a lang ang.
Khawngaihin, he thiltih hian harsatna awm thei a keng tel tih hre reng ang che overflow
—when setting overflow-y: auto
(hetah hian content scroll tur a ngai), overflow-x
is the equivalent of auto
, chu chuan horizontal content thenkhat a crop ang.
Hetah hian entirnan navbar hmanga .navbar-nav-scroll
with style="max-height: 100px;"
, extra margin utility thenkhat nen optimum spacing atan kan rawn tarlang e.
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar scroll</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarScroll" aria-controls="navbarScroll" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarScroll">
<ul class="navbar-nav mr-auto my-2 my-lg-0 navbar-nav-scroll" style="max-height: 100px;">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" role="button" data-toggle="dropdown" aria-expanded="false">
Link
</a>
<ul class="dropdown-menu">
<li><a class="dropdown-item" href="#">Action</a></li>
<li><a class="dropdown-item" href="#">Another action</a></li>
<li><hr class="dropdown-divider"></li>
<li><a class="dropdown-item" href="#">Something else here</a></li>
</ul>
</li>
<li class="nav-item">
<a class="nav-link disabled">Link</a>
</li>
</ul>
<form class="d-flex">
<input class="form-control mr-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success" type="submit">Search</button>
</form>
</div>
</nav>
Chhanna pe thei nungchang
Navbars hian .navbar-toggler
, .navbar-collapse
, leh .navbar-expand{-sm|-md|-lg|-xl}
class te hmangin an content chu button hnung lama a collapse hun tur a hriat theih a ni. Utility dang nena inzawm chuan awlsam takin element bikte engtikah nge i lantir dawn emaw, i thup dawn emaw tih i thlang thei a ni.
Navbar collap ngai lo tan chuan .navbar-expand
navbar ah class kha add la. .navbar-expand
Navbar collapse fo thin tan chuan class engmah add suh .
Toggler a ni
Navbar togglers te hi default-in left-aligned an ni a, mahse sibling element ang chi an zawm a nih chuan .navbar-brand
right right-ah automatic-in an align ang. I markup reverse chuan toggler dahna chu a reverse ang. A hnuaia tarlan te hi toggle style hrang hrang entir a ni.
.navbar-brand
Breakpoint tenau ber ah no show a awm lo:
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo01" aria-controls="navbarTogglerDemo01" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarTogglerDemo01">
<a class="navbar-brand" href="#">Hidden brand</a>
<ul class="navbar-nav mr-auto mt-2 mt-lg-0">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
A vei lamah brand hming a lang a, ding lamah toggler a awm bawk:
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<a class="navbar-brand" href="#">Navbar</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
<ul class="navbar-nav mr-auto mt-2 mt-lg-0">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
Vei lamah toggler leh dinglamah brand name awmin:
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarTogglerDemo03" aria-controls="navbarTogglerDemo03" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<a class="navbar-brand" href="#">Navbar</a>
<div class="collapse navbar-collapse" id="navbarTogglerDemo03">
<ul class="navbar-nav mr-auto mt-2 mt-lg-0">
<li class="nav-item active">
<a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="#">Link</a>
</li>
<li class="nav-item">
<a class="nav-link disabled">Disabled</a>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success my-2 my-sm-0" type="submit">Search</button>
</form>
</div>
</nav>
Pawn lam thil awmte
A châng chuan collapse plugin hmangin structurally sits outside of the content atan container element trigger i duh thin .navbar
. Kan plugin hian id
and data-target
matching ah hna a thawh avangin chu chu awlsam takin a ti thei!
<div class="fixed-top">
<div class="collapse" id="navbarToggleExternalContent">
<div class="bg-dark p-4">
<h5 class="text-white h4">Collapsed content</h5>
<span class="text-muted">Toggleable via the navbar brand.</span>
</div>
</div>
<nav class="navbar navbar-dark bg-dark">
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarToggleExternalContent" aria-controls="navbarToggleExternalContent" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
</nav>
</div>
Chutianga i tih hunah chuan a hawn hunah focus chu programmatically-in container-ah i sawn theih nan JavaScript dang dah belh turin kan rawt a che. Chutiang a nih loh chuan keyboard hmangtute leh assistive technology hmangtute chuan thu thar an hmuh chu an harsat phah mai thei - a bik takin container hawn chu document structure-a toggler hmaa a lo kal chuan. Tin, toggler hian aria-controls
attribute a neih ngei ngei tur a ni tih kan rawt bawk a, chu chu id
of the content container-ah a kawhhmuh a ni. Theory-ah chuan, hei hian assistive technology hmangtute chu toggler atanga a control container-ah direct-in a zuang lut thei a–mahse tunah chuan hei hi thlawpna chu a patchy hle.