Dropdowns

Toggle overlays kontekstual pikeun mintonkeun daptar tumbu jeung leuwih ku Bootstrap dropdown plugin.

Ihtisar

Dropdowns tiasa toggle, overlays kontekstual pikeun mintonkeun daptar tumbu sareng seueur deui. Éta didamel interaktif sareng plugin JavaScript dropdown Bootstrap anu kalebet. Aranjeunna toggled ku ngaklik, teu ku hovering; ieu kaputusan desain ngahaja .

Dropdowns diwangun dina perpustakaan pihak katilu, Popper , nu nyadiakeun positioning dinamis sarta deteksi viewport. Pastikeun kalebet popper.min.js sateuacan Bootstrap JavaScript atanapi nganggo bootstrap.bundle.min.js/ bootstrap.bundle.jsanu ngandung Popper. Popper henteu dianggo pikeun nempatkeun turunna dina navbar sanaos posisi dinamis henteu diperyogikeun.

Upami anjeun nuju ngawangun JavaScript kami tina sumber, peryogiutil.js .

Aksesibilitas

Standar WAI ARIA ngahartikeun role="menu"widget sabenerna , tapi ieu husus pikeun ménu kawas aplikasi nu memicu tindakan atawa fungsi. Menu ARIA ngan ukur tiasa ngandung item ménu, item ménu kotak centang, item ménu tombol radio, grup tombol radio, sareng sub-menu.

Dropdown Bootstrap, di sisi anu sanés, dirancang pikeun umum sareng tiasa dianggo pikeun sababaraha kaayaan sareng struktur markup. Contona, kasebut nyaéta dimungkinkeun pikeun nyieun dropdowns nu ngandung inputs tambahan sarta kontrol formulir, kayaning widang teangan atawa formulir login. Ku sabab kitu, Bootstrap henteu nyangka (atanapi sacara otomatis nambihan) salah sahiji rolesareng aria-atribut anu diperyogikeun pikeun ménu ARIA anu leres. Pangarang kedah ngalebetkeun atribut anu langkung spésifik ieu nyalira.

Nanging, Bootstrap nambihan dukungan anu diwangun pikeun sabagéan ageung interaksi ménu keyboard standar, sapertos kamampuan pikeun mindahkeun .dropdown-itemelemen individu nganggo konci kursor sareng nutup ménu nganggo ESCkonci éta.

Contona

Bungkus toggle dropdown urang (tombol atawa link anjeun) jeung menu dropdown dina .dropdown, atawa elemen séjén nu nyatakeun position: relative;. Dropdowns tiasa dipicu tina <a>atanapi <button>elemen pikeun nyocogkeun ka kabutuhan poténsial anjeun.

Tombol tunggal

Sakur tunggal .btntiasa dirobih janten togél lungsur sareng sababaraha parobihan markup. Kieu kumaha anjeun tiasa nempatkeun aranjeunna damel sareng unsur- <button>unsur:

<div class="dropdown">
  <button class="btn btn-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
    Dropdown button
  </button>
  <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>
</div>

Jeung <a>unsur:

<div class="dropdown">
  <a class="btn btn-secondary 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>
</div>

Bagian anu pangsaéna nyaéta anjeun tiasa ngalakukeun ieu sareng varian tombol naon waé:

<!-- Example single danger button -->
<div class="btn-group">
  <button type="button" class="btn btn-danger dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
    Action
  </button>
  <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 class="dropdown-divider"></div>
    <a class="dropdown-item" href="#">Separated link</a>
  </div>
</div>

Tombol pamisah

Nya kitu, jieun dropdowns tombol pamisah jeung markup ampir sarua salaku dropdowns tombol tunggal, tapi ditambahan .dropdown-toggle-splitpikeun spasi ditangtoskeun sabudeureun caret dropdown.

Kami nganggo kelas tambahan ieu pikeun ngirangan horisontal paddingdina dua sisi karet ku 25% sareng ngahapus margin-leftanu ditambah pikeun turunna tombol biasa. Parobihan tambahan éta ngajaga karét dipuseurkeun dina tombol pamisah sareng nyayogikeun daérah pencét ukuran anu langkung pas gigireun tombol utama.

<!-- Example split danger button -->
<div class="btn-group">
  <button type="button" class="btn btn-danger">Action</button>
  <button type="button" class="btn btn-danger dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
    <span class="sr-only">Toggle Dropdown</span>
  </button>
  <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 class="dropdown-divider"></div>
    <a class="dropdown-item" href="#">Separated link</a>
  </div>
</div>

Ukuran

Tombol dropdowns tiasa dianggo sareng tombol sadaya ukuran, kalebet tombol dropdown standar sareng pamisah.

<!-- Large button groups (default and split) -->
<div class="btn-group">
  <button class="btn btn-secondary btn-lg dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
    Large button
  </button>
  <div class="dropdown-menu">
    ...
  </div>
</div>
<div class="btn-group">
  <button class="btn btn-secondary btn-lg" type="button">
    Large split button
  </button>
  <button type="button" class="btn btn-lg btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
    <span class="sr-only">Toggle Dropdown</span>
  </button>
  <div class="dropdown-menu">
    ...
  </div>
</div>

<!-- Small button groups (default and split) -->
<div class="btn-group">
  <button class="btn btn-secondary btn-sm dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
    Small button
  </button>
  <div class="dropdown-menu">
    ...
  </div>
</div>
<div class="btn-group">
  <button class="btn btn-secondary btn-sm" type="button">
    Small split button
  </button>
  <button type="button" class="btn btn-sm btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
    <span class="sr-only">Toggle Dropdown</span>
  </button>
  <div class="dropdown-menu">
    ...
  </div>
</div>

Pitunjuk

Dropup

Micu ménu dropdown luhureun elemen ku nambahkeun .dropupkana elemen indungna.

<!-- Default dropup button -->
<div class="btn-group dropup">
  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
    Dropup
  </button>
  <div class="dropdown-menu">
    <!-- Dropdown menu links -->
  </div>
</div>

<!-- Split dropup button -->
<div class="btn-group dropup">
  <button type="button" class="btn btn-secondary">
    Split dropup
  </button>
  <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
    <span class="sr-only">Toggle Dropdown</span>
  </button>
  <div class="dropdown-menu">
    <!-- Dropdown menu links -->
  </div>
</div>

Dropright

Micu ménu dropdown di katuhu tina elemen ku nambahkeun .droprightkana elemen indungna.

<!-- Default dropright button -->
<div class="btn-group dropright">
  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
    Dropright
  </button>
  <div class="dropdown-menu">
    <!-- Dropdown menu links -->
  </div>
</div>

<!-- Split dropright button -->
<div class="btn-group dropright">
  <button type="button" class="btn btn-secondary">
    Split dropright
  </button>
  <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
    <span class="sr-only">Toggle Dropright</span>
  </button>
  <div class="dropdown-menu">
    <!-- Dropdown menu links -->
  </div>
</div>

Titisan

Micu ménu dropdown di kénca elemen ku nambahkeun .dropleftkana elemen indungna.

<!-- Default dropleft button -->
<div class="btn-group dropleft">
  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
    Dropleft
  </button>
  <div class="dropdown-menu">
    <!-- Dropdown menu links -->
  </div>
</div>

<!-- Split dropleft button -->
<div class="btn-group">
  <div class="btn-group dropleft">
    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false">
      <span class="sr-only">Toggle Dropleft</span>
    </button>
    <div class="dropdown-menu">
      <!-- Dropdown menu links -->
    </div>
  </div>
  <button type="button" class="btn btn-secondary">
    Split dropleft
  </button>
</div>

Sacara sajarah, eusi ménu lungsur kedah janten tautan, tapi éta henteu deui kasus v4. Ayeuna anjeun optionally bisa ngagunakeun <button>elemen dina dropdowns anjeun tinimbang ngan <a>s.

<div class="dropdown">
  <button class="btn btn-secondary dropdown-toggle" type="button" data-toggle="dropdown" aria-expanded="false">
    Dropdown
  </button>
  <div class="dropdown-menu">
    <button class="dropdown-item" type="button">Action</button>
    <button class="dropdown-item" type="button">Another action</button>
    <button class="dropdown-item" type="button">Something else here</button>
  </div>
</div>

Anjeun oge bisa nyieun item dropdown non-interaktif jeung .dropdown-item-text. Ngarasa Luncat ka gaya salajengna kalawan CSS custom atawa utilitas téks.

<div class="dropdown-menu">
  <span class="dropdown-item-text">Dropdown item text</span>
  <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>

Aktip

Tambahkeun .activeka item dina dropdown pikeun gaya aranjeunna salaku aktip .

<div class="dropdown-menu">
  <a class="dropdown-item" href="#">Regular link</a>
  <a class="dropdown-item active" href="#">Active link</a>
  <a class="dropdown-item" href="#">Another link</a>
</div>

ditumpurkeun

Tambahkeun .disabledka item dina dropdown pikeun gaya aranjeunna salaku ditumpurkeun .

<div class="dropdown-menu">
  <a class="dropdown-item" href="#">Regular link</a>
  <a class="dropdown-item disabled">Disabled link</a>
  <a class="dropdown-item" href="#">Another link</a>
</div>

Sacara standar, menu dropdown otomatis diposisikan 100% ti luhur jeung sapanjang sisi kénca indungna. Tambahkeun .dropdown-menu-rightka .dropdown-menukatuhu align menu dropdown.

Mastaka tegak! Dropdowns diposisikan berkat Popper (iwal lamun aranjeunna dikandung dina navbar a).

<div class="btn-group">
  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false">
    Right-aligned menu
  </button>
  <div class="dropdown-menu dropdown-menu-right">
    <button class="dropdown-item" type="button">Action</button>
    <button class="dropdown-item" type="button">Another action</button>
    <button class="dropdown-item" type="button">Something else here</button>
  </div>
</div>

alignment responsif

Upami anjeun hoyong nganggo alignment responsif, pareuman posisi dinamis ku cara nambihan data-display="static"atribut sareng nganggo kelas variasi responsif.

Pikeun align katuhu menu dropdown jeung breakpoint dibikeun atawa leuwih badag, tambahkeun .dropdown-menu{-sm|-md|-lg|-xl}-right.

<div class="btn-group">
  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-display="static" aria-expanded="false">
    Left-aligned but right aligned when large screen
  </button>
  <div class="dropdown-menu dropdown-menu-lg-right">
    <button class="dropdown-item" type="button">Action</button>
    <button class="dropdown-item" type="button">Another action</button>
    <button class="dropdown-item" type="button">Something else here</button>
  </div>
</div>

Pikeun align kénca menu dropdown jeung breakpoint dibikeun atawa leuwih badag, tambahkeun .dropdown-menu-rightna .dropdown-menu{-sm|-md|-lg|-xl}-left.

<div class="btn-group">
  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-display="static" aria-expanded="false">
    Right-aligned but left aligned when large screen
  </button>
  <div class="dropdown-menu dropdown-menu-right dropdown-menu-lg-left">
    <button class="dropdown-item" type="button">Action</button>
    <button class="dropdown-item" type="button">Another action</button>
    <button class="dropdown-item" type="button">Something else here</button>
  </div>
</div>

Catet yén anjeun henteu kedah nambihan data-display="static"atribut kana tombol turun dina navbar, sabab Popper henteu dianggo dina navbar.

lulugu

Tambahkeun lulugu pikeun labél bagian tina lampah dina menu dropdown mana wae.

<div class="dropdown-menu">
  <h6 class="dropdown-header">Dropdown header</h6>
  <a class="dropdown-item" href="#">Action</a>
  <a class="dropdown-item" href="#">Another action</a>
</div>

Pamisah

Misahkeun grup item menu nu patali jeung divider 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 class="dropdown-divider"></div>
  <a class="dropdown-item" href="#">Separated link</a>
</div>

Téks

Teundeun sagala téks wangun bébas dina menu dropdown kalawan téks na make spasi utilitas . Catet yén anjeun sigana peryogi gaya ukuran tambahan pikeun ngawatesan lebar ménu.

<div class="dropdown-menu p-4 text-muted" style="max-width: 200px;">
  <p>
    Some example text that's free-flowing within the dropdown menu.
  </p>
  <p class="mb-0">
    And this is more example text.
  </p>
</div>

Bentuk

Nempatkeun formulir dina menu dropdown, atawa nyieun kana menu dropdown, sarta ngagunakeun margin atawa padding Utiliti pikeun masihan eta spasi négatip nu peryogi.

<div class="dropdown-menu">
  <form class="px-4 py-3">
    <div class="form-group">
      <label for="exampleDropdownFormEmail1">Email address</label>
      <input type="email" class="form-control" id="exampleDropdownFormEmail1" placeholder="[email protected]">
    </div>
    <div class="form-group">
      <label for="exampleDropdownFormPassword1">Password</label>
      <input type="password" class="form-control" id="exampleDropdownFormPassword1" placeholder="Password">
    </div>
    <div class="form-group">
      <div class="form-check">
        <input type="checkbox" class="form-check-input" id="dropdownCheck">
        <label class="form-check-label" for="dropdownCheck">
          Remember me
        </label>
      </div>
    </div>
    <button type="submit" class="btn btn-primary">Sign in</button>
  </form>
  <div class="dropdown-divider"></div>
  <a class="dropdown-item" href="#">New around here? Sign up</a>
  <a class="dropdown-item" href="#">Forgot password?</a>
</div>

<form class="dropdown-menu p-4">
  <div class="form-group">
    <label for="exampleDropdownFormEmail2">Email address</label>
    <input type="email" class="form-control" id="exampleDropdownFormEmail2" placeholder="[email protected]">
  </div>
  <div class="form-group">
    <label for="exampleDropdownFormPassword2">Password</label>
    <input type="password" class="form-control" id="exampleDropdownFormPassword2" placeholder="Password">
  </div>
  <div class="form-group">
    <div class="form-check">
      <input type="checkbox" class="form-check-input" id="dropdownCheck2">
      <label class="form-check-label" for="dropdownCheck2">
        Remember me
      </label>
    </div>
  </div>
  <button type="submit" class="btn btn-primary">Sign in</button>
</form>

Anggo data-offsetatanapi data-referencekanggo ngarobih lokasi turunna.

<div class="d-flex">
  <div class="dropdown mr-1">
    <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" aria-expanded="false" data-offset="10,20">
      Offset
    </button>
    <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>
  </div>
  <div class="btn-group">
    <button type="button" class="btn btn-secondary">Reference</button>
    <button type="button" class="btn btn-secondary dropdown-toggle dropdown-toggle-split" data-toggle="dropdown" aria-expanded="false" data-reference="parent">
      <span class="sr-only">Toggle Dropdown</span>
    </button>
    <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 class="dropdown-divider"></div>
      <a class="dropdown-item" href="#">Separated link</a>
    </div>
  </div>
</div>

Pamakéan

Via atribut data atawa JavaScript, plugin dropdown toggles eusi disumputkeun (dropdown menu) ku toggling .showkelas on indungna .dropdown-menu. Atribut data-toggle="dropdown"ieu diandelkeun pikeun nutup ménu lungsur dina tingkat aplikasi, janten ide anu sae pikeun nganggo éta.

Dina alat touch-diaktipkeun, muka dropdown nambahkeun kosong ( $.noop) mouseoverpawang ka barudak langsung <body>unsur. Hack anu diakui awon ieu diperyogikeun pikeun ngerjakeun quirk dina delegasi acara ios , anu bakal nyegah ketok dimana waé di luar dropdown tina pemicu kode anu nutup turunna. Sakali dropdown ditutup, pawang kosong tambahan mouseoverieu dihapus.

Via atribut data

Tambihkeun data-toggle="dropdown"kana tautan atanapi tombol pikeun ngagentoskeun turunna.

<div class="dropdown">
  <button type="button" data-toggle="dropdown" aria-expanded="false">
    Dropdown trigger
  </button>
  <div class="dropdown-menu">
    ...
  </div>
</div>

Ngaliwatan JavaScript

Nelepon dropdowns via JavaScript:

$('.dropdown-toggle').dropdown()

`data-toggle="dropdown"`masih diperlukeun

Paduli naha anjeun nelepon dropdown Anjeun liwat JavaScript atawa gantina ngagunakeun data-api, data-toggle="dropdown"salawasna diperlukeun pikeun hadir dina elemen pemicu dropdown urang.

Pilihan

Pilihan bisa diliwatan via atribut data atawa JavaScript. Pikeun atribut data, tambahkeun nami pilihan ka data-, sapertos dina data-offset="".

Ngaran	Tipe	Default	Katerangan
ngimbangan	angka \| string \| fungsi	0	Offset tina dropdown relatif ka target na. Lamun fungsi dipaké pikeun nangtukeun offset, mangka disebut obyék nu ngandung data offset salaku argumen munggaran. Fungsina kedah ngabalikeun obyék kalayan struktur anu sami. The triggering unsur DOM titik diliwatan salaku argumen kadua. Kanggo inpo nu leuwih lengkep tingal docs offset Popper urang .
malik	boolean	leres	Ngidinan Dropdown malik upami aya tumpang tindih dina unsur rujukan. Kanggo inpo nu leuwih lengkep tingal docs flip Popper urang .
wates	string \| unsur	'scrollParent'	Wates konstrain overflow tina menu dropdown. Narima nilai `'viewport'`, `'window'`, `'scrollParent'`, atawa rujukan HTMLElement (JavaScript wungkul). Kanggo inpo nu leuwih lengkep tingal Popper urang preventOverflow docs .
rujukan	string \| unsur	'ngalihkeun'	Unsur rujukan tina menu dropdown. Narima nilai `'toggle'`, `'parent'`, atawa rujukan HTMLElement. Kanggo inpo nu leuwih lengkep tingal Popper urang referenceObject docs .
tampilan	senar	'dinamis'	Sacara standar, kami nganggo Popper pikeun posisi dinamis. Pareuman ieu nganggo `static`.
popperConfig	null \| objék	null	Pikeun ngarobah konfigurasi Popper standar Bootstrap, tingali konfigurasi Popper

Catet lamun boundarydisetel ka nilai nu mana wae nu lian ti 'scrollParent', gaya position: staticditerapkeun kana .dropdownwadahna.

Métode

Métode	Katerangan
`$().dropdown('toggle')`	Toggles menu dropdown tina navbar tinangtu atawa navigasi tab.
`$().dropdown('show')`	Nembongkeun menu dropdown tina navbar dibikeun atawa navigasi tab.
`$().dropdown('hide')`	Nyumputkeun menu dropdown tina navbar atanapi navigasi tab.
`$().dropdown('update')`	Ngamutahirkeun posisi turunna unsur.
`$().dropdown('dispose')`	Ngancurkeun dropdown hiji unsur.

Kajadian

Kabéh acara dropdown dipecat dina .dropdown-menu's unsur indungna sarta mibanda relatedTargetsipat, anu nilaina unsur jangkar toggling. hide.bs.dropdownsarta hidden.bs.dropdownacara boga clickEventsipat (ngan lamun jenis acara aslina nyaeta click) nu ngandung hiji Objék Acara pikeun acara klik.

Acara	Katerangan
`show.bs.dropdown`	Kajadian ieu langsung hurung nalika metode conto acara disebut.
`shown.bs.dropdown`	Kajadian ieu dipecat nalika turunna parantos katingali ku pangguna (bari ngadagoan transisi CSS, réngsé).
`hide.bs.dropdown`	Kajadian ieu langsung dipecat nalika metode conto sumputkeun parantos disebut.
`hidden.bs.dropdown`	Acara ieu dipecat nalika dropdown tos rengse disumputkeun ti pamaké (bakal ngadagoan transisi CSS, pikeun ngalengkepan).

$('#myDropdown').on('show.bs.dropdown', function () {
  // do something...
})

Dropdowns

Ihtisar

Aksesibilitas

Contona

Tombol tunggal

Tombol pamisah

Ukuran

Pitunjuk

Dropup

Dropright

Titisan

Item menu

Aktip

ditumpurkeun

alignment menu

alignment responsif

eusi menu

lulugu

Pamisah

Téks

Bentuk

Pamakéan

Via atribut data

Ngaliwatan JavaScript

`data-toggle="dropdown"`masih diperlukeun

Pilihan

Métode

Kajadian

Dropdowns

Ihtisar

Aksesibilitas

Contona

Tombol tunggal

Tombol pamisah

Ukuran

Pitunjuk

Dropup

Dropright

Titisan

Item menu

Aktip

ditumpurkeun

alignment menu

alignment responsif

eusi menu

lulugu

lulugu dropdown

Pamisah

Téks

Bentuk

Pilihan dropdown

Pamakéan

Via atribut data

Ngaliwatan JavaScript

data-toggle="dropdown"masih diperlukeun

Pilihan

Métode

Kajadian

`data-toggle="dropdown"`masih diperlukeun