Source

Scrollspy

Na-emelite igodo Bootstrap na-akpaghị aka ma ọ bụ depụta ihe mejupụtara otu dabere na ọnọdụ mpịakọta iji gosi njikọ dị ugbu a na ebe nlele.

Ka o si arụ ọrụ

Scrollspy nwere ihe ole na ole achọrọ iji rụọ ọrụ nke ọma:

  • Ọ bụrụ na ị na-ewu Javascript anyị site na isi iyi, ọ chọrọutil.js .
  • A ga-eji ya na akụrụngwa Bootstrap nav ma ọ bụ otu ndepụta .
  • Scrollspy chọrọ position: relative;na mmewere ị na-enyocha, na-abụkarị <body>.
  • Mgbe ị na-enyocha ihe ndị ọzọ na-abụghị nke <body>, jide n'aka na ị nwere heightnhazi ma overflow-y: scroll;tinye ya.
  • Achọrọ arịlịka ( <a>) ma ga-arụtụ aka na mmewere na nke ahụ id.

Mgbe etinyere ya nke ọma, ụgbọ mmiri gị ma ọ bụ otu ndepụta ga-emelite otu a, na-ebugharị .activeklaasị site n'otu ihe gaa na nke ọzọ dabere na ebumnuche ha jikọtara ya.

Ọmụmaatụ na navbar

Pịgharịa na mpaghara n'okpuru ebe ịnya ụgbọ mmiri wee lelee mgbanwe klaasị nọ n'ọrụ. A ga-eme ka ọ pụta ìhè nke ọma.

@abụba

Ad leggings keytar, brunch id art party dolor labour. Pitchfork yr enim lo-fi tupu ha ere qui. Ikike igwe kwụ otu ebe Tumblr ugbo gaa na tebụl ihe ọ bụla. Anim keffiyeh carles cardigan. Ụlọ foto Velit seitan mcsweeney 3 wolf moon irure. Cosby sweta lomo jean shorts, williamsburg hoodie minim qui eleghị anya, ị nụbeghị banyere ha et cardigan Trust fund culpa biodiesel wes anderson aesthetic. Nihil egbugbu 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 ozi akpa marfa ọ bụla delectus nri gwongworo. Sapiente synth id echere. Locavore sed helvetica cliche irony, thundercats eleghị anya ị nụbeghị banyere ha na-akpata hoodie gluten-free lo-fi fap aliquip. Ụlọ ọrụ dị elu tupu ha ere ere, Terry Richardson proident brunch nesciunt quis cosby sweta pariatur keffiyeh ut helvetica artisan. Cardigan craft biya 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>

Ọmụmaatụ nwere nav akwu

Scrollspy na-arụkwa ọrụ na akwu .navs. Ọ bụrụ akwụ .navbụ .active, ndị mụrụ ya ga-abụkwa .active. Pịgharịa n'akụkụ navbar wee lelee klaasị na-agbanwe agbanwe.

Ihe 1

Ex consequat commodo adipisicing exercitation aute excepteur occaecat ullamco duis aliqua id magna ullamco eu. Ị nwere ike ị nweta ọrụ na-arụ ọrụ. Ọ na-eme ka oge na-aga n'ihu na-eme ka a pụta ìhè. Ndị na-eme ihe na-eme ka ndị mmadụ na-eme ihe na-adịghị mma magna eiusmod consectetur in. Ị ga-ahụ ndị na-abụghị fugiat id cupidatat nulla elit cupidatat commodo velit ut eiusmod cupidatat elit dolore.

Ihe 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. Nọdụ ala n'ụzọ zuru oke ullamco aute magna pariatur nostrud labour. 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.

Ihe 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 sit laborre Lorem na mmega ahụ siri ike. Occaecat consectetur nisi in occaecat proident minim eyim sunt reprehenderit exercitation cupidatat et do officia. Mee ka ọrụ gị rụọ ọrụ nke ọma. Nọdụ ala nwa oge na 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>

Ọmụmaatụ nwere ndepụta-otu

Scrollspy na-arụkwa ọrụ na .list-groups. Pịgharịa na mpaghara n'akụkụ otu ndetu wee lelee mgbanwe klaasị nọ n'ọrụ.

Ihe 1

Ex consequat commodo adipisicing exercitation aute excepteur occaecat ullamco duis aliqua id magna ullamco eu. Ị nwere ike ị nweta ọrụ na-arụ ọrụ. Ọ na-eme ka oge na-aga n'ihu na-eme ka a pụta ìhè. Ndị na-eme ihe na-eme ka ndị mmadụ na-eme ihe na-adịghị mma magna eiusmod consectetur in. Ị ga-ahụ ndị na-abụghị fugiat id cupidatat nulla elit cupidatat commodo velit ut eiusmod cupidatat elit dolore.

Ihe 2

Ọ bụ ya mere Lorem na-eme ka ọ dịrị gị mfe ịnọdụ ala 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. Inciddunt veniam velit elit elit veniam Lorem aliqua quis ullamco deserunt sit enim elit aliqua esse irure. Laborum nisi sit est tempor laborum mollit labour officia laborum excepteur commodo non commodo dolor excepteur commodo. Ipsum fugiat ex est consectetur ipsum commodo tempor sunt in proident.

Ihe 3

N'ezie, nke a na-anọdụ ala n'ụzọ ziri ezi. Ọ dịghị mkpa ka ọ pụta ìhè nke ọma ma e wezụga nke ahụ. Deserunt tempor mollit elit ex pariatur dolore velit fugiat mollit culpa irure ullamco est ex ullamco excepteur.

Ihe 4

N'ezie, nke a na-anọdụ ala n'ụzọ ziri ezi. Ọ dịghị mkpa ka ọ pụta ìhè nke ọma ma e wezụga nke ahụ. Deserunt tempor mollit elit ex pariatur dolore velit fugiat mollit culpa irure ullamco est ex ullamco excepteur.

<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>

Ojiji

Site na njirimara data

Ka mfe tinye scrollspy omume na gị topbar navigation, tinye data-spy="scroll"na mmewere ị chọrọ inyocha na (kasị a ga-abụ <body>). Wee tinye data-targetnjirimara na ID ma ọ bụ klas nke ihe nne na nna nke .navakụrụngwa Bootstrap ọ bụla.

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>

Site na Javascript

Ka ịgbakwunye position: relative;na CSS gị, kpọọ scrollspy site na Javascript:

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

Ebumnuche ID nwere ike idozi chọrọ

Njikọ Navbar ga-enwerịrị ebumnuche id nwere ike idozi. Dịka ọmụmaatụ, a <a href="#home">home</a>ga-ederịrị ihe na DOM dịka <div id="home"></div>.

Ihe ndị na- abụghị :visibleebumnuche leghaara anya

A ga-eleghara ihe ndị ezubere iche na-abụghị :visiblenke jQuery si dị na agaghị eme ka ihe ụgbọ mmiri ha dabara adaba pụta ìhè.

Ụzọ

.scrollspy('refresh')

Mgbe ị na-eji scrollspy yana ịgbakwunye ma ọ bụ wepụ ihe ndị dị na DOM, ị ga-akpọ usoro ume ọhụrụ dị ka:

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

.scrollspy('dispose')

Na-emebi akwụkwọ mpịakọta mmewere.

Nhọrọ

Enwere ike ịfefe nhọrọ site na njirimara data ma ọ bụ Javascript. Maka njirimara data, tinye aha nhọrọ na data-, dị ka ọ dị na data-offset="".

Aha Ụdị Ọdabara Nkọwa
nkwụsị nọmba 10 Pikselụ ka a ga-esi n'elu pụta mgbe ị na-agbakọ ọnọdụ mpịakọta.

Ihe omume

Ụdị mmemme Nkọwa
rụọ ọrụ.bs.scrollspy Ihe omume a na-agba ọkụ na akụkụ akwụkwọ mpịakọta mgbe ọ bụla ihe ọhụrụ na-arụ ọrụ site na scrollspy. 
$('[data-spy="scroll"]').on('activate.bs.scrollspy', function () {
  // do something…
})