Source

Scrollspy

Aġġorna awtomatikament in-navigazzjoni Bootstrap jew elenka l-komponenti tal-grupp ibbażati fuq il-pożizzjoni tal-iscroll biex tindika liema link hija attwalment attiva fil-viewport.

Kif taħdem

Scrollspy għandu ftit rekwiżiti biex jaħdem sew:

  • Jekk qed tibni JavaScript tagħna mis-sors, teħtieġutil.js .
  • Għandu jintuża fuq komponent Bootstrap nav jew grupp ta 'lista .
  • Scrollspy jirrikjedi position: relative;fuq l-element li qed tispija fuqu, normalment il- <body>.
  • Meta spying fuq elementi minbarra l- <body>, kun żgur li jkollok heightsett u overflow-y: scroll;applikati.
  • Ankri ( <a>) huma meħtieġa u għandhom jindikaw element ma ' dak id.

Meta tiġi implimentata b'suċċess, in-nav jew il-grupp tal-lista tiegħek ser jaġġorna kif xieraq, u jċaqlaq il- .activeklassi minn oġġett għall-ieħor ibbażat fuq il-miri assoċjati tagħhom.

Eżempju fin-navbar

Skrollja ż-żona taħt in-navbar u ara l-bidla fil-klassi attiva. L-oġġetti dropdown se jiġu enfasizzati wkoll.

@xaħam

Ad leggings keytar, brunch id art party dolor labore. Pitchfork yr enim lo-fi qabel ma jinbiegħu qui. Tumblr drittijiet tar-roti minn farm-to-mejda tkun xi tkun. Anim keffiyeh carles cardigan. Velit seitan mcsweeney's photo booth 3 lupu qamar irure. Cosby sweater lomo jean shorts, williamsburg hoodie minim qui inti probabilment ma smajtx minnhom et cardigan trust fund culpa bijodiżil wes anderson estetika. Nihil tattooed accusamus, cred ironija bijodiżil keffiyeh artiġjanali 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 kwalunkwe delectus food truck. Sapiente synth id assumenda. Locavore sed helvetica cliche ironija, thundercats inti probabilment ma smajtx minnhom consequat hoodie gluten free lo-fi fap aliquip. Labore elit placeat before they sold out, terry richardson proident brunch nesciunt quis cosby sweater 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>

Eżempju b'nav nested

Scrollspy jaħdem ukoll ma nested .navs. Jekk nested .navhuwa .active, il-ġenituri tiegħu se jkunu wkoll .active. Skrollja ż-żona ħdejn in-navbar u ara l-bidla tal-klassi attiva.

Punt 1

Ex consequat commodo adipisicing exercitation aute excepteur 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 excepteur 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.

Punt 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 dues qui consequat labore adipisicing sint dolor elit cillum anim et fugiat.

Punt 1-2

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 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 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 1-2</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>

Eżempju bil-lista-grupp

Scrollspy jaħdem ukoll ma ' .list-groups. Skrollja ż-żona ħdejn il-grupp tal-lista u ara l-bidla tal-klassi attiva.

Punt 1

Ex consequat commodo adipisicing exercitation aute excepteur 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 excepteur 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.

Punt 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.

Punt 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.

Punt 4

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.

<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>

Użu

Via attributi tad-data

Biex iżżid faċilment l-imġieba scrollspy man-navigazzjoni topbar tiegħek, żid data-spy="scroll"mal-element li trid tispija fuqu (l-aktar tipikament dan ikun il- <body>). Imbagħad żid l- data-targetattribut bl-ID jew il-klassi tal-element ġenitur ta 'kwalunkwe .navkomponent 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>

Via JavaScript

Wara li żżid position: relative;fis-CSS tiegħek, ċempel l-iscrollspy permezz ta' JavaScript:

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

Miri ta' ID riżolvibbli meħtieġa

Ir-rabtiet tan-Navbar għandu jkollhom miri id risolvibbli. Per eżempju, <a href="#home">home</a>għandu jikkorrispondi għal xi ħaġa fid-DOM bħal <div id="home"></div>.

Elementi mhux :visiblefil-mira injorati

Elementi fil-mira li mhumiex :visibleskont jQuery se jiġu injorati u l-oġġetti tan-nav korrispondenti tagħhom qatt ma jiġu enfasizzati.

Metodi

.scrollspy('refresh')

Meta tuża scrollspy flimkien maż-żieda jew it-tneħħija ta 'elementi mid-DOM, ikollok bżonn issejjaħ il-metodu ta' aġġornar hekk:

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

.scrollspy('dispose')

Jeqred scrollspy ta' element.

Għażliet

L-għażliet jistgħu jiġu mgħoddija permezz ta' attributi tad-dejta jew JavaScript. Għal attributi tad-dejta, ehmeż l-isem tal-għażla ma' data-, bħal f' data-offset="".

Isem Tip Default Deskrizzjoni
offset numru 10 Pixels biex ipattu minn fuq meta tikkalkula l-pożizzjoni tal-iscroll.
metodu spag auto Isib f'liema sezzjoni jinsab l-element spied. autoSe jagħżel l-aħjar metodu biex tikseb il-koordinati tal-iscroll. offsetse juża jQuery offset metodu biex tikseb iscroll koordinati. positionse tuża l-metodu tal-pożizzjoni jQuery biex tikseb il-koordinati tal-iscroll.
mira spag Jispeċifika l-element biex japplika Scrollspy plugin.

Avvenimenti

Tip ta' Avveniment Deskrizzjoni
attivate.bs.scrollspy Dan l-avveniment jispara fuq l-element tal-iscroll kull meta oġġett ġdid jiġi attivat mill-iscrollspy. 
$('[data-spy="scroll"]').on('activate.bs.scrollspy', function () {
  // do something...
})