Scrollspy

Samodejno posodobi navigacijo Bootstrap ali komponente skupine seznamov na podlagi položaja drsenja, da pokaže, katera povezava je trenutno aktivna v vidnem polju.

Kako deluje

Scrollspy ima nekaj zahtev za pravilno delovanje:

Če gradite naš JavaScript iz izvorne kode, zahtevautil.js .
Uporabiti ga je treba v navigacijski komponenti ali skupini seznamov Bootstrap .
Scrollspy zahteva position: relative;element, za katerim vohunite, običajno <body>.
Ko vohunite za elementi, ki niso <body>, se prepričajte, da imate heightnastavljen in overflow-y: scroll;uporabljen.
Sidra ( <a>) so obvezna in morajo kazati na element s tem id.

Ko bo uspešno izvedena, se bo vaša navigacija ali skupina seznamov ustrezno posodobila in premaknila .activerazred od enega elementa do drugega glede na njihove povezane cilje.

Pomaknite se po območju pod vrstico za krmarjenje in opazujte spremembo aktivnega razreda. Označeni bodo tudi spustni elementi.

@debela

Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi preden so razprodali qui. Pravice za kolesa Tumblr od kmetije do mize. Jopica Anim keffiyeh carles. Velit seitan mcsweeney's photo booth 3 wolf moon irure. Cosby pulover lomo jean kratke hlače, williamsburg hoodie minim qui verjetno še niste slišali zanje in jopica skrbniški sklad culpa biodiesel wes anderson aesthetic. Nihil tetoviran akuzamus, cred ironija biodizel keffiyeh obrtnik 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 domnevno. Locavore sed helvetica kliše ironija, thundercats verjetno še niste slišali zanje consequat pulover s kapuco brez glutena lo-fi fap aliquip. Labore elit placeat preden so bili razprodani, terry richardson proident brunch nesciunt quis cosby pulover pariatur keffiyeh ut helvetica artisan. Cardigan craft beer 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>

Primer z ugnezdeno nav

Scrollspy deluje tudi z ugnezdenimi .navs. Če je ugnezdeni .nav, .activebodo tudi njegovi starši .active. Pomaknite se po območju poleg vrstice za krmarjenje in opazujte spremembo aktivnega razreda.

Točka 1

Ex consequat commodo adipisicing exercitation aute exceptioneur occaecat ullamco duis aliqua id magna ullamco eu. Do aute ipsum ipsum ullamco cillum consectetur ut et aute consectetur labore. Fugiat laborum incididunt tempor eu consequat enim dolore proident. Qui laborum do non exceptioneur nulla magna eiusmod consectetur in. Aliqua et aliqua officia quis et incididunt voluptate non anim reprehenderit adipisicing dolore ut consequat deserunt mollit dolore. Aliquip nulla enim veniam non fugiat id cupidatat nulla elit cupidatat commodo velit ut eiusmod cupidatat elit dolore.

Postavka 1-1

Amet tempor mollit aliquip pariatur exceptioneur commodo do ea cillum commodo Lorem et occaecat elit qui et. Aliquip labore ex ex esse voluptate occaecat Lorem ullamco deserunt. Aliqua cillum exceptioneur 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 exceptioneur minim exercitation minim minim commodo adipisicing exercitation officia nisi adipisicing. Anim id duis qui consequat labore adipisicing sint dolor elit cillum anim et fugiat.

Točka 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 exceptioneur eu Lorem ipsum anim commodo sint labore Lorem in exercitation velit incididunt. Occaecat consectetur nisi in occaecat proident minim enim sunt reprehenderit exercitation cupidatat et do officia. Aliquip consequat ad labore labore mollit ut amet. Sit pariatur tempor proident in veniam culpa aliqua exceptioneur 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>

Primer s skupino seznamov

Scrollspy deluje tudi s .list-groups. Pomaknite se po območju poleg skupine seznama in opazujte spremembo aktivnega razreda.

Točka 1 Točka 2 Točka 3 Točka 4

Točka 1

Točka 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.

Točka 3

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

Točka 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>

Uporaba

Preko podatkovnih atributov

Če želite enostavno dodati vohunsko vedenje v svojo zgornjo vrstico, dodajte data-spy="scroll"element, za katerim želite vohuniti (najpogosteje je to <body>). Nato dodajte data-targetatribut z ID-jem ali razredom nadrejenega elementa katere koli .navkomponente Bootstrap.

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>

Prek JavaScripta

Ko dodate position: relative;svoj CSS, pokličite scrollspy prek JavaScripta:

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

Zahtevani so razrešljivi ID cilji

Povezave vrstice za krmarjenje morajo imeti razločljive cilje ID-ja. Na primer, <a href="#home">home</a>mora ustrezati nečemu v DOM, kot je <div id="home"></div>.

Neciljni `:visible`elementi so prezrti

Ciljni elementi, ki niso :visiblev skladu z jQuery , bodo prezrti in njihovi ustrezni navigacijski elementi ne bodo nikoli označeni.

Metode

`.scrollspy('refresh')`

Ko uporabljate scrollspy v povezavi z dodajanjem ali odstranjevanjem elementov iz DOM, boste morali poklicati metodo osveževanja takole:

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

`.scrollspy('dispose')`

Uniči scrollspy elementa.

Opcije

Možnosti je mogoče posredovati prek podatkovnih atributov ali JavaScripta. Za atribute podatkov pripnite ime možnosti v data-, kot v data-offset="".

Ime	Vrsta	Privzeto	Opis
odmik	število	10	Slikovne pike za zamik od vrha pri izračunu položaja drsenja.

Dogodki

Vrsta dogodka	Opis
activate.bs.scrollspy	Ta dogodek se sproži na elementu drsenja vsakič, ko scrollspy aktivira nov element.

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

Scrollspy

Kako deluje

Primer v vrstici za krmarjenje

@debela

@mdo

one

two

three

Primer z ugnezdeno nav

Točka 1

Postavka 1-1

Točka 2-2

Item 2

Item 3

Item 3-1

Item 3-2

Primer s skupino seznamov

Točka 1

Točka 2

Točka 3

Točka 4

Uporaba

Preko podatkovnih atributov

Prek JavaScripta

Zahtevani so razrešljivi ID cilji

Neciljni :visibleelementi so prezrti

Metode

.scrollspy('refresh')

.scrollspy('dispose')

Opcije

Dogodki

Neciljni `:visible`elementi so prezrti

`.scrollspy('refresh')`

`.scrollspy('dispose')`