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Scrollspy

Fa'afou otometi le Bootstrap navigation po'o le lisi o vaega vaega e fa'atatau i le tulaga ta'ai e fa'ailoa ai po'o fea so'otaga o lo'o galue i le va'aiga.

I luga o lenei itulau

E faapefea ona galue

Scrollspy ei ai ni nai mana'oga e galue lelei:

E tatau ona fa'aogaina i luga o se vaega Bootstrap nav po'o se vaega lisi .
Scrollspy e manaʻomia position: relative;le elemene o loʻo e vaʻavaʻai i ai, e masani lava o le <body>.
O taula ( <a>) e mana'omia ma e tatau ona faasino i se elemene o lo'o iai lena id.

A manuia le fa'atinoina, o lau nav po'o le lisi o vaega o le a fa'afouina e tusa ai, ma fa'agasolo le .activevasega mai le tasi mea i le isi e fa'atatau i a latou fa'atatauga.

Koneteina e mafai ona su'e ma avanoa i le keyboard

Afai o lo'o e faia se atigipusa e mafai ona ta'ai (e ese mai i le <body>), ia mautinoa e iai se heightseti ma overflow-y: scroll;fa'aoga i ai—fa'atasi ai ma le tabindex="0"fa'amautu le avanoa o le keyboard.

Fa'asolo le vaega i lalo o le navbar ma matamata le suiga o le vasega. O mea e pa'u i lalo o le a fa'ailogaina fo'i.

Uluai ulutala

O nisi nei o mea e tu'u ai avanoa mo le itulau scrollspy. Manatua a e fa'asolo i lalo le itulau, o lo'o fa'ailoaina le so'otaga fa'atautaiga talafeagai. E toe fai i le fa'ata'ita'iga vaega. Matou te faʻaopoopoina nisi faʻataʻitaʻiga kopi iinei e faʻamamafa ai le taʻavale ma faʻailoga.

Ulutala lona lua

Ulutala lona tolu

Ulutala lona fa

Ulutala lona lima

<nav id="navbar-example2" class="navbar navbar-light bg-light px-3">
  <a class="navbar-brand" href="#">Navbar</a>
  <ul class="nav nav-pills">
    <li class="nav-item">
      <a class="nav-link" href="#scrollspyHeading1">First</a>
    </li>
    <li class="nav-item">
      <a class="nav-link" href="#scrollspyHeading2">Second</a>
    </li>
    <li class="nav-item dropdown">
      <a class="nav-link dropdown-toggle" data-bs-toggle="dropdown" href="#" role="button" aria-expanded="false">Dropdown</a>
      <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="#scrollspyHeading3">Third</a></li>
        <li><a class="dropdown-item" href="#scrollspyHeading4">Fourth</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#scrollspyHeading5">Fifth</a></li>
      </ul>
    </li>
  </ul>
</nav>
<div data-bs-spy="scroll" data-bs-target="#navbar-example2" data-bs-offset="0" class="scrollspy-example" tabindex="0">
  <h4 id="scrollspyHeading1">First heading</h4>
  <p>...</p>
  <h4 id="scrollspyHeading2">Second heading</h4>
  <p>...</p>
  <h4 id="scrollspyHeading3">Third heading</h4>
  <p>...</p>
  <h4 id="scrollspyHeading4">Fourth heading</h4>
  <p>...</p>
  <h4 id="scrollspyHeading5">Fifth heading</h4>
  <p>...</p>
</div>

Fa'aa'oa'oga fa'atasi ma fa'anofo nav

E galue fo'i Scrollspy i fa'aputuga .navs. Afai o se faamoega , .nave .activefaapena foi ona matua .active. Fa'asolo le vaega i tafatafa o le navbar ma matamata le suiga o le vasega.

Aitema 1

Aitema 1-1

Aitema 1-2

Aitema 2

Aitema 3

Aitema 3-1

Aitema 3-2

<nav id="navbar-example3" class="navbar navbar-light bg-light flex-column align-items-stretch p-3">
  <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 ms-3 my-1" href="#item-1-1">Item 1-1</a>
      <a class="nav-link ms-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 ms-3 my-1" href="#item-3-1">Item 3-1</a>
      <a class="nav-link ms-3 my-1" href="#item-3-2">Item 3-2</a>
    </nav>
  </nav>
</nav>

<div data-bs-spy="scroll" data-bs-target="#navbar-example3" data-bs-offset="0" tabindex="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>

Faataitaiga ma lisi-vaega

E galue foi Scrollspy ma .list-groups. Fa'asolo le vaega i talaane o le vaega o le lisi ma matamata le suiga o le vasega.

Aitema 1 Aitema 2 Aitema 3 Aitema 4

Aitema 1

Aitema 2

Aitema 3

Aitema 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-bs-spy="scroll" data-bs-target="#list-example" data-bs-offset="0" class="scrollspy-example" tabindex="0">
  <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>

Fa'aoga

E ala i fa'amaumauga uiga

Ina ia fa'afaigofie ona fa'aopoopo le amio ta'avale i lau ta'avale pito i luga, fa'aopoopo data-bs-spy="scroll"i le elemene e te mana'o e sipai ai (sili ona masani o le <body>). Ona faʻaopoopo lea o le data-bs-targetuiga faʻatasi ma le ID poʻo le vasega o le matua elemene o soʻo se .navvaega Bootstrap.

body {
  position: relative;
}

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

E ala i le JavaScript

A uma ona faʻaopoopo position: relative;i lau CSS, valaʻau le scrollspy e ala i le JavaScript:

var scrollSpy = new bootstrap.ScrollSpy(document.body, {
  target: '#navbar-example'
})

E mana'omia ni fa'ailoga ID e mafai ona fo'ia

O feso'ota'iga Navbar e tatau ona i ai ni fa'ailoga id e mafai ona fo'ia. Mo se faʻataʻitaʻiga, e <a href="#home">home</a>tatau ona fetaui ma se mea i le DOM pei <div id="home"></div>.

O elemene fa'amoemoe e le o va'aia ua le amana'ia

O elemene fa'amoemoe e le o va'aia o le a le amana'ia ma o latou mea fa'atatau nav o le a le fa'ailoaina lava.

Metotia

faafou

A faʻaaoga le scrollspy faʻatasi ma le faʻaopoopoina poʻo le aveesea o elemene mai le DOM, e tatau ona e valaʻau le auala faʻafouina e pei o lea:

var dataSpyList = [].slice.call(document.querySelectorAll('[data-bs-spy="scroll"]'))
dataSpyList.forEach(function (dataSpyEl) {
  bootstrap.ScrollSpy.getInstance(dataSpyEl)
    .refresh()
})

lafoa'i

Fa'aleagaina le ta'avale a se elemene. (Ave'ese fa'amaumauga o lo'o teuina ile elemene DOM)

getInstance

Metotia static lea e mafai ai e oe ona maua le scrollspy faʻataʻitaʻiga e fesoʻotaʻi ma se elemene DOM

var scrollSpyContentEl = document.getElementById('content')
var scrollSpy = bootstrap.ScrollSpy.getInstance(scrollSpyContentEl) // Returns a Bootstrap scrollspy instance

getOrCreateInstance

Metotia static lea e mafai ai e oe ona maua le scrollspy faʻataʻitaʻiga e fesoʻotaʻi ma se elemene DOM, poʻo le fatuina o se mea fou i le tulaga e leʻi amataina.

var scrollSpyContentEl = document.getElementById('content')
var scrollSpy = bootstrap.ScrollSpy.getOrCreateInstance(scrollSpyContentEl) // Returns a Bootstrap scrollspy instance

Filifiliga

O filifiliga e mafai ona pasia e ala i faʻamatalaga uiga poʻo le JavaScript. Mo fa'amatalaga uiga, fa'aopoopo le igoa filifiliga i le data-bs-, pei o le data-bs-offset="".

Igoa	Ituaiga	Fa'atonu	Fa'amatalaga
`offset`	numera	`10`	Pixels e fa'asolo mai luga pe a fa'atatau le tulaga o le ta'ai.
`method`	manoa	`auto`	Su'e po'o fea vaega o lo'o i ai le elemene spied. `auto`o le a filifili le auala sili e maua ai fa'asologa ta'ai. `offset`o le a faʻaogaina le `Element.getBoundingClientRect()`auala e maua ai faʻamaumauga taʻavale. `position`o le a fa'aogaina le `HTMLElement.offsetTop`ma `HTMLElement.offsetLeft`meatotino e maua ai fa'amaopoopo tusi.
`target`	manoa \| jQuery mea \| DOM elemene		Fa'amaoti elemene e fa'aoga ai le Scrollspy plugin.

Mea na tutupu

Ituaiga mea na tupu	Fa'amatalaga
`activate.bs.scrollspy`	O lenei mea na tupu e mu i luga o le elemene taʻavale i soo se taimi e faʻagaoioia ai se mea fou e le scrollspy.

var firstScrollSpyEl = document.querySelector('[data-bs-spy="scroll"]')
firstScrollSpyEl.addEventListener('activate.bs.scrollspy', function () {
  // do something...
})

Scrollspy

E faapefea ona galue

Koneteina e mafai ona su'e ma avanoa i le keyboard

Faataitaiga i le navbar

Uluai ulutala

Ulutala lona lua

Ulutala lona tolu

Ulutala lona fa

Ulutala lona lima

Fa'aa'oa'oga fa'atasi ma fa'anofo nav

Aitema 1

Aitema 1-1

Aitema 1-2

Aitema 2

Aitema 3

Aitema 3-1

Aitema 3-2

Faataitaiga ma lisi-vaega

Aitema 1

Aitema 2

Aitema 3

Aitema 4

Fa'aoga

E ala i fa'amaumauga uiga

E ala i le JavaScript

E mana'omia ni fa'ailoga ID e mafai ona fo'ia

O elemene fa'amoemoe e le o va'aia ua le amana'ia

Metotia

faafou

lafoa'i

getInstance

getOrCreateInstance

Filifiliga

Mea na tutupu