Scrollspy

Sasisha kiotomatiki urambazaji wa Bootstrap au orodhesha vipengee vya kikundi kulingana na nafasi ya kusogeza ili kuonyesha ni kiungo gani kinachotumika kwa sasa kwenye poti ya kutazama.

Inavyofanya kazi

Scrollspy ina mahitaji machache ili kufanya kazi vizuri:

Ikiwa unaunda JavaScript yetu kutoka kwa chanzo, inahitajiutil.js .
Ni lazima itumike kwenye kijenzi cha Bootstrap nav au kikundi cha orodha .
Scrollspy inahitaji position: relative;kipengee unachokipeleleza, kawaida <body>.
Wakati wa kupeleleza vipengele vingine isipokuwa <body>, hakikisha kuwa una heightseti na overflow-y: scroll;kutumika.
Nanga ( <a>) zinahitajika na lazima zielekeze kwenye kipengele kilicho na hicho id.

Inapotekelezwa kwa ufanisi, nav au kikundi chako cha orodha kitasasishwa ipasavyo, na kuhamisha .activedarasa kutoka kipengee kimoja hadi kingine kulingana na malengo yao yanayohusiana.

Tembeza eneo chini ya upau wa urambazaji na utazame mabadiliko ya darasa amilifu. Vipengee kunjuzi vitaangaziwa pia.

@mafuta

Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi kabla ya kuuza qui. Haki za baiskeli za kilimo kwa meza za Tumblr chochote. Anim keffiyeh carles cardigan. kibanda cha picha cha Velit seitan mcsweeney 3 wolf moon irure. Cosby sweta la lomo jean kaptula, williamsburg hoodie minim qui pengine hujasikia kuzihusu na cardigan trust fund culpa biodiesel wes anderson aesthetic. Nihil aliandika tattoo accusamus, cred irony biodiesel keffiyeh artisan ullamco consequat.

@mdo

Veniam marfa mustache skateboard, adipisicing fugiat velit pitchfork beard. Freegan beard aliqua cupidatat mcsweeney's vero. Cupidatat four loko nisi, ea helvetica nulla carles. Tattooed cosby sweater food truck, mcsweeney's quis non freegan vinyl. Lo-fi wes anderson +1 sartorial. Carles non aesthetic exercitation quis gentrify. Brooklyn adipisicing craft beer vice keytar deserunt.

one

Occaecat commodo aliqua delectus. Fap craft beer deserunt skateboard ea. Lomo bicycle rights adipisicing banh mi, velit ea sunt next level locavore single-origin coffee in magna veniam. High life id vinyl, echo park consequat quis aliquip banh mi pitchfork. Vero VHS est adipisicing. Consectetur nisi DIY minim messenger bag. Cred ex in, sustainable delectus consectetur fanny pack iphone.

two

In incididunt echo park, officia deserunt mcsweeney's proident master cleanse thundercats sapiente veniam. Excepteur VHS elit, proident shoreditch +1 biodiesel laborum craft beer. Single-origin coffee wayfarers irure four loko, cupidatat terry richardson master cleanse. Assumenda you probably haven't heard of them art party fanny pack, tattooed nulla cardigan tempor ad. Proident wolf nesciunt sartorial keffiyeh eu banh mi sustainable. Elit wolf voluptate, lo-fi ea portland before they sold out four loko. Locavore enim nostrud mlkshk brooklyn nesciunt.

three

Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi before they sold out qui. Tumblr farm-to-table bicycle rights whatever. Anim keffiyeh carles cardigan. Velit seitan mcsweeney's photo booth 3 wolf moon irure. Cosby sweater lomo jean shorts, williamsburg hoodie minim qui you probably haven't heard of them et cardigan trust fund culpa biodiesel wes anderson aesthetic. Nihil tattooed accusamus, cred irony biodiesel keffiyeh artisan ullamco consequat.

Keytar twee blog, culpa messenger bag marfa whatever deelectus food truck. Sapiente synth id id kudhani. Locavore sed helvetica cliche kejeli, thundercats pengine hujasikia kuwahusu consequat hoodie gluten-free lo-fi fap aliquip. Labore elit placeat kabla hazijauzwa, terry richardson proident brunch nesciunt quis cosby sweater pariatur keffiyeh ut helvetica artisan. Cardigan hila bia seitan readymade velit. VHS chambray laboris tempor veniam. Anim mollit minim commodo ullamco thundercats.

<nav id="navbar-example2" class="navbar navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <ul class="nav nav-pills">
    <li class="nav-item">
      <a class="nav-link" href="#fat">@fat</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#mdo">@mdo</a>
    </li>
    <li class="nav-item dropdown">
      <a class="nav-link dropdown-toggle" data-toggle="dropdown" href="#" role="button" aria-haspopup="true" aria-expanded="false">Dropdown</a>
      <div class="dropdown-menu">
        <a class="dropdown-item" href="#one">one</a>
        <a class="dropdown-item" href="#two">two</a>
        <div role="separator" class="dropdown-divider"></div>
        <a class="dropdown-item" href="#three">three</a>
      </div>
    </li>
  </ul>
</nav>
<div data-spy="scroll" data-target="#navbar-example2" data-offset="0">
  <h4 id="fat">@fat</h4>
  <p>...</p>
  <h4 id="mdo">@mdo</h4>
  <p>...</p>
  <h4 id="one">one</h4>
  <p>...</p>
  <h4 id="two">two</h4>
  <p>...</p>
  <h4 id="three">three</h4>
  <p>...</p>
</div>

Mfano na nested nav

Scrollspy pia inafanya kazi na nested .navs. Ikiwa kiota kitawekwa .nav, .activewazazi wake pia watakuwa .active. Tembeza eneo karibu na upau wa urambazaji na utazame mabadiliko ya darasa yanayoendelea.

Kipengee cha 1

Ex consequat commodo adipisicing exercitation aute excepteur occaecat ullamco duis aliqua id magna ullamco eu. Je, utafanya kazi kwa bidii ili ufanye kazi kwa bidii. Fugiat laborum incididunt tempor eu consequat enim dolore proident. Qui laborum do not excepteur nulla magna eiusmod conctetur in. Aliqua na aliqua officia quis and incididunt voluptate non anim reprehenderit adipisicing dore ut consequat deserunt mollit dolore. Unaweza kufanya hivyo kwa urahisi zaidi bila kutoroka id kuwa na uwezo wa kuongeza idadi ya bidhaa bora kwa ajili ya ut eiusmod cupidatat elit dolore.

Kipengee 1-1

Amet tempor mollit aliquip pariatur excepteur commodo do ea cillum commodo Lorem et occaecat elit qui et. Aliquip labore ex ex esse voluptate occaecat Lorem ullamco deserunt. Aliqua cillum excepteur irure consequat id quis ea. Sit proident ullamco aute magna pariatur nostrud labore. Reprehenderit aliqua commodo eiusmod aliquip est do duis amet proident magna consectetur consequat eu commodo fugiat non quis. Enim aliquip exercitation ullamco adipisicing voluptate excepteur minim exercitation minim minim commodo adipisicing exercitation officia nisi adipisicing. Anim id duis qui consequat labore adipisicing sint dolor elit cillum anim et fugiat.

Kipengee 2-2

Cillum nisi deserunt magna eiusmod qui eiusmod velit voluptate pariatur laborum sunt enim. Irure laboris mollit consequat incididunt sint et culpa culpa incididunt adipisicing magna magna occaecat. Nulla ipsum cillum eiusmod sint elit excepteur ea labore enim consectetur in labore anim. Proident ullamco ipsum esse elit ut Lorem eiusmod dolor et eiusmod. Anim occaecat nulla in non consequat eiusmod velit incididunt.

Item 2

Quis magna Lorem anim amet ipsum do mollit sit cillum voluptate ex nulla tempor. Laborum consequat non elit enim exercitation cillum aliqua consequat id aliqua. Esse ex consectetur mollit voluptate est in duis laboris ad sit ipsum anim Lorem. Incididunt veniam velit elit elit veniam Lorem aliqua quis ullamco deserunt sit enim elit aliqua esse irure. Laborum nisi sit est tempor laborum mollit labore officia laborum excepteur commodo non commodo dolor excepteur commodo. Ipsum fugiat ex est consectetur ipsum commodo tempor sunt in proident.

Item 3

Quis anim sit do amet fugiat dolor velit sit ea ea do reprehenderit culpa duis. Nostrud aliqua ipsum fugiat minim proident occaecat excepteur aliquip culpa aute tempor reprehenderit. Deserunt tempor mollit elit ex pariatur dolore velit fugiat mollit culpa irure ullamco est ex ullamco excepteur.

Item 3-1

Deserunt quis elit Lorem eiusmod amet enim enim amet minim Lorem proident nostrud. Ea id dolore anim exercitation aute fugiat labore voluptate cillum do laboris labore. Ex velit exercitation nisi enim labore reprehenderit labore nostrud ut ut. Esse officia sunt duis aliquip ullamco tempor eiusmod deserunt irure nostrud irure. Ullamco proident veniam laboris ea consectetur magna sunt ex exercitation aliquip minim enim culpa occaecat exercitation. Est tempor excepteur aliquip laborum consequat do deserunt laborum esse eiusmod irure proident ipsum esse qui.

Item 3-2

Labore sit culpa commodo elit adipisicing sit aliquip elit proident voluptate minim mollit nostrud aute reprehenderit do. Mollit excepteur eu Lorem ipsum anim commodo sint labore Lorem incididunt exercitation. Occaecat consectetur nisi in occaecat proident minim enim sunt reprehenderit exercitation cupidatat and do officia. Aliquip consequat ad labore labore mollit ut amet. Sit pariatur tempor proident in veniam culpa aliqua excepteur elit magna fugiat eiusmod amet officia.

<nav id="navbar-example3" class="navbar navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <nav class="nav nav-pills flex-column">
    <a class="nav-link" href="#item-1">Item 1</a>
    <nav class="nav nav-pills flex-column">
      <a class="nav-link ml-3 my-1" href="#item-1-1">Item 1-1</a>
      <a class="nav-link ml-3 my-1" href="#item-1-2">Item 1-2</a>
    </nav>
    <a class="nav-link" href="#item-2">Item 2</a>
    <a class="nav-link" href="#item-3">Item 3</a>
    <nav class="nav nav-pills flex-column">
      <a class="nav-link ml-3 my-1" href="#item-3-1">Item 3-1</a>
      <a class="nav-link ml-3 my-1" href="#item-3-2">Item 3-2</a>
    </nav>
  </nav>
</nav>

<div data-spy="scroll" data-target="#navbar-example3" data-offset="0">
  <h4 id="item-1">Item 1</h4>
  <p>...</p>
  <h5 id="item-1-1">Item 1-1</h5>
  <p>...</p>
  <h5 id="item-1-2">Item 2-2</h5>
  <p>...</p>
  <h4 id="item-2">Item 2</h4>
  <p>...</p>
  <h4 id="item-3">Item 3</h4>
  <p>...</p>
  <h5 id="item-3-1">Item 3-1</h5>
  <p>...</p>
  <h5 id="item-3-2">Item 3-2</h5>
  <p>...</p>
</div>

Mfano na kikundi cha orodha

Scrollspy pia inafanya kazi na .list-groups. Tembeza eneo karibu na kikundi cha orodha na uangalie mabadiliko ya darasa yanayoendelea.

Kipengee cha 1 Kipengee cha 2 Kipengee cha 3 Kipengee cha 4

Kipengee cha 1

Kipengee cha 2

Quis magna Lorem anim amet ipsum do mollit sit sit cillum voluptate ex nulla tempor. Laborum consequat non elit enim exercitation cillum aliqua consequat id aliqua. Esse ex consectetur mollit voluptate est in duis laboris ad kukaa ipsum anim Lorem. Tukio hili ni jambo la kushangaza zaidi kuliko wengine. Laborum nisi sit est tempor laborum mollit labore officia laborum excepteur commodo non commodo dolor excepteur commodo. Ipsum fugiat ex est consectetur ipsum commodo tempor sunt in proident.

Kipengee cha 3

Kipengee cha 4

<div id="list-example" class="list-group">
  <a class="list-group-item list-group-item-action" href="#list-item-1">Item 1</a>
  <a class="list-group-item list-group-item-action" href="#list-item-2">Item 2</a>
  <a class="list-group-item list-group-item-action" href="#list-item-3">Item 3</a>
  <a class="list-group-item list-group-item-action" href="#list-item-4">Item 4</a>
</div>
<div data-spy="scroll" data-target="#list-example" data-offset="0" class="scrollspy-example">
  <h4 id="list-item-1">Item 1</h4>
  <p>...</p>
  <h4 id="list-item-2">Item 2</h4>
  <p>...</p>
  <h4 id="list-item-3">Item 3</h4>
  <p>...</p>
  <h4 id="list-item-4">Item 4</h4>
  <p>...</p>
</div>

Matumizi

Kupitia sifa za data

Ili kuongeza kwa urahisi tabia ya kusongesha kwenye urambazaji wa upau wako wa juu, ongeza data-spy="scroll"kwenye kipengee unachotaka kupeleleza (kawaida hii itakuwa <body>). Kisha ongeza data-targetsifa na kitambulisho au darasa la kipengele kikuu cha kipengele chochote cha Bootstrap .nav.

body {
  position: relative;
}

<body data-spy="scroll" data-target="#navbar-example">
  ...
  <div id="navbar-example">
    <ul class="nav nav-tabs" role="tablist">
      ...
    </ul>
  </div>
  ...
</body>

Kupitia JavaScript

Baada ya kuongeza position: relative;katika CSS yako, piga scrollspy kupitia JavaScript:

$('body').scrollspy({ target: '#navbar-example' })

Vitambulisho vinavyoweza kutatuliwa vinahitajika

Viungo vya Upau wa Uelekezaji lazima viwe na malengo ya vitambulisho vinavyoweza kutatuliwa. Kwa mfano, <a href="#home">home</a>lazima ilingane na kitu kwenye DOM kama <div id="home"></div>.

`:visible`Vipengele visivyolengwa vimepuuzwa

Vipengele vinavyolengwa ambavyo havilingani :visiblena jQuery vitapuuzwa na vipengee vyake vya nav vinavyolingana havitaangaziwa kamwe.

Mbinu

`.scrollspy('refresh')`

Unapotumia scrollspy kwa kushirikiana na kuongeza au kuondoa vitu kutoka kwa DOM, utahitaji kupiga njia ya kuburudisha kama hivyo:

$('[data-spy="scroll"]').each(function () {
  var $spy = $(this).scrollspy('refresh')
})

`.scrollspy('dispose')`

Huharibu scrollspy ya kipengele.

Chaguo

Chaguzi zinaweza kupitishwa kupitia sifa za data au JavaScript. Kwa sifa za data, ongeza jina la chaguo kwa data-, kama katika data-offset="".

Jina	Aina	Chaguomsingi	Maelezo
kukabiliana	nambari	10	Pikseli za kurekebisha kutoka juu wakati wa kukokotoa nafasi ya kusogeza.

Matukio

Aina ya Tukio	Maelezo
amilisha.bs.scrollspy	Tukio hili huwashwa kwenye kipengele cha kusogeza wakati wowote kipengee kipya kinapowezeshwa na scrollspy.

$('[data-spy="scroll"]').on('activate.bs.scrollspy', function () {
  // do something…
})

Scrollspy

Inavyofanya kazi

Mfano katika navbar

@mafuta

@mdo

one

two

three

Mfano na nested nav

Kipengee cha 1

Kipengee 1-1

Kipengee 2-2

Item 2

Item 3

Item 3-1

Item 3-2

Mfano na kikundi cha orodha

Kipengee cha 1

Kipengee cha 2

Kipengee cha 3

Kipengee cha 4

Matumizi

Kupitia sifa za data

Kupitia JavaScript

Vitambulisho vinavyoweza kutatuliwa vinahitajika

:visibleVipengele visivyolengwa vimepuuzwa

Mbinu

.scrollspy('refresh')

.scrollspy('dispose')

Chaguo

Matukio

`:visible`Vipengele visivyolengwa vimepuuzwa

`.scrollspy('refresh')`

`.scrollspy('dispose')`