Source

Scrollspy

Sinthani zokha mayendedwe a Bootstrap kapena mndandanda wamagulu amagulu kutengera malo osindikizira kuti muwonetse ulalo womwe ukugwira ntchito powonera.

Momwe zimagwirira ntchito

Scrollspy ili ndi zofunikira zingapo kuti igwire bwino ntchito:

  • Ngati mukupanga JavaScript yathu kuchokera kugwero, pamafunikautil.js .
  • Iyenera kugwiritsidwa ntchito pagawo la Bootstrap nav kapena gulu la mndandanda .
  • Scrollspy imafuna position: relative;pa chinthu chomwe mukuchizonda, nthawi zambiri <body>.
  • Mukayang'ana zinthu zina osati <body>, onetsetsani kuti heightmwakhazikitsa ndikuyika overflow-y: scroll;.
  • Nangula ( <a>) amafunikira ndipo ayenera kuloza ku chinthu chomwe chili ndi chimenecho id.

Mukagwiritsidwa ntchito bwino, gulu lanu la nav kapena mndandanda lidzasintha moyenera, ndikusuntha .activekalasi kuchokera ku chinthu chimodzi kupita ku china kutengera zomwe akufuna.

Chitsanzo mu navbar

Sungani malo omwe ali pansi pa navbar ndikuwona kusintha kwa kalasi yogwira. Zinthu zotsikira zidzawonetsedwanso.

@mafuta

Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi asanagulitse. Ufulu wa njinga zamtundu wa Tumblr zilizonse. Ma cardigan opangidwa ndi manja. Chithunzi cha Velit seitan mcsweeney 3 wolf moon irure. Cosby sweti la lomo jean akabudula, williamsburg hoodie minim qui mwina simunamvepo za iwo et cardigan trust fund culpa biodiesel wes anderson aesthetic. Nihil tattooed 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 delectus food truck. Sapiente synth id guessnda. Locavore sed helvetica cliche irony, mabingu mwina simunawamvepo consequat hoodie gluten-free lo-fi fap aliquip. Labore elit placeat asanagulitse, terry richardson proident brunch nesciunt quis cosby sweater pariatur keffiyeh ut helvetica artisan. Cardigan craft mowa seitan readymade velit. VHS chambray laboris tempor veniam. Anim mollit minim commodo ullamco mabingu.

<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>

Chitsanzo ndi nested nav

Scrollspy imagwiranso ntchito ndi nested .navs. Ngati chisa .navchili .active, makolo akenso adzakhala .active. Mpukutu pafupi ndi navbar ndikuwona kusintha kwa kalasi yogwira.

Chinthu 1

Ex consequat commodo adipisicing exercitation aute excepteur occaecat ullamco duis aliqua id magna ullamco eu. Yesetsani kuchitapo kanthu mwamsanga mutatha kugwira ntchito mwakhama. Fugiat laborum incididunt tempor eu consequat enim dolore proident. Qui laborum do non excepteur nulla magna eiusmod consectetur in. Aliqua et aliqua officia quis et incididunt voluptate non anim reprehenderit adipisicing dore ut consequat deserunt mollit dolore. Aliquip nulla enim veniam non fugiat id cupidatat nulla elit cupidatat commodo velit ut eiusmod cupidatat elit dolore.

Chithunzi 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. Khalani patsogolo 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 commodo adipisicing exercitation officia nisi adipisicing. Anim id duis qui consequat labore adipisicing sint dolor elit cillum anim et fugiat.

Chithunzi 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 in ercitation velit incididunt. Occaecat consectetur is in occaecat proident minim enim sunt reprehenderit exercitation cupidatat and do office. 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>

Chitsanzo ndi mndandanda-gulu

Scrollspy imagwiranso ntchito ndi .list-groups. Mpukutu m'dera pafupi ndi mndandanda gulu ndi kuona yogwira kusintha kalasi.

Chinthu 1

Ex consequat commodo adipisicing exercitation aute excepteur occaecat ullamco duis aliqua id magna ullamco eu. Yesetsani kuchitapo kanthu mwamsanga mutatha kugwira ntchito mwakhama. Fugiat laborum incididunt tempor eu consequat enim dolore proident. Qui laborum do non excepteur nulla magna eiusmod consectetur in. Aliqua et aliqua officia quis et incididunt voluptate non anim reprehenderit adipisicing dore ut consequat deserunt mollit dolore. Aliquip nulla enim veniam non fugiat id cupidatat nulla elit cupidatat commodo velit ut eiusmod cupidatat elit dolore.

Chinthu 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. Izi zinachititsa kuti pakhale kusintha kwakukulu m'mabungwe amtundu wa Lorem. Chomwe chimapangitsa kuti chikhale chovuta kwambiri 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 imathamangira kuphatikizika kwanthawi yayitali kwanthawi yayitali.

Chinthu 3

Quis anim sit do amet fugiat dolor velit sit 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.

Chinthu 4

Quis anim sit do amet fugiat dolor velit sit 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.

<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>

Kugwiritsa ntchito

Kudzera muzochita za data

Kuti muwonjezere machitidwe a scrollspy pakuyenda kwanu kwapamwamba, onjezani data-spy="scroll"ku chinthu chomwe mukufuna kuti mukazonde (nthawi zambiri izi zitha kukhala <body>). Kenako onjezani mawonekedwewo data-targetndi ID kapena kalasi ya kholo la gawo lililonse la 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>

Kudzera pa JavaScript

Mukawonjezera position: relative;mu CSS yanu, imbani scrollspy kudzera pa JavaScript:

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

Zolinga za ID zothetsedwa ndizofunikira

Maulalo a Navbar akuyenera kukhala ndi ma id omwe angathetsedwe. Mwachitsanzo, <a href="#home">home</a>ziyenera kugwirizana ndi china chake mu DOM monga <div id="home"></div>.

Zinthu zomwe sizinali :visiblechandamale sizinanyalanyazidwe

Zolinga zomwe sizikugwirizana :visiblendi jQuery sizidzanyalanyazidwa ndipo zomwe zikugwirizana nazo sizidzawonetsedwa konse.

Njira

.scrollspy('refresh')

Mukamagwiritsa ntchito scrollspy molumikizana ndi kuwonjezera kapena kuchotsa zinthu mu DOM, muyenera kuyimbira njira yotsitsimutsa motere:

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

.scrollspy('dispose')

Imawononga scrollspy ya chinthu.

Zosankha

Zosankha zitha kuperekedwa kudzera pa data kapena JavaScript. Pamawonekedwe a data, yonjezerani dzina lachisankho ku data-, monga mu data-offset="".

Dzina Mtundu Zosasintha Kufotokozera
kuchepetsa nambala 10 Ma pixel oti muyike kuchokera pamwamba powerengera malo osindikizira.

Zochitika

Mtundu wa Chochitika Kufotokozera
activate.bs.scrollspy Chochitikachi chimayaka pamipukutu nthawi iliyonse chinthu chatsopano chikatsegulidwa ndi scrollspy. 
$('[data-spy="scroll"]').on('activate.bs.scrollspy', function () {
  // do something…
})