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Scrollspy

Whakahōu aunoatia te whakaterenga Bootstrap, whakarārangihia rānei ngā wāhanga rōpū i runga i te tūnga panuku hei tohu ko tēhea hononga e hohe ana i te tauranga tirohanga.

I tenei wharangi

Pehea te mahi

He torutoru nga whakaritenga a Scrollspy hei mahi tika:

Me whakamahi i runga i te waahanga Bootstrap nav , te roopu rarangi ranei .
Ka hiahia a Scrollspy position: relative;ki te huānga e tuteia ana e koe, ko te tikanga ko te <body>.
Ko nga punga ( <a>) e hiahiatia ana me tohu ki tetahi huānga me tera id.

Ina oti pai te whakatinanatanga, ka whakahōuhia e to nav me to roopu rarangi ingoa, ka nekehia te .activeakomanga mai i tetahi mea ki tetahi atu i runga i o raatau whaainga.

Nga ipu ka taea te panuku me te uru papapātuhi

Mena kei te mahi koe i tetahi ipu ka taea te panuku (i tua atu i te <body>), me mau he heighthuinga me overflow-y: scroll;te tono ki runga—te taha o te tabindex="0"urunga papapātuhi.

Panuku i te waahi kei raro i te pae whakatere ka mataki i te huringa o te karaehe hohe. Ko nga taonga takaiho ka tohua ano.

Pane tuatahi

Ko etahi ihirangi puri wahi tenei mo te wharangi scrollspy. Kia mahara ka panuku koe ki raro i te wharangi, ka tohuhia te hononga whakatere tika. Ka tukuruatia puta noa i te tauira waahanga. Ka taapirihia e matou etahi tauira tauira ki konei hei whakanui i te panuku me te miramira.

Pane tuarua

Upoko tuatoru

Upoko tuawha

Upoko tuarima

<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>

Tauira me te nav kohanga

Ka mahi ano a Scrollspy me nga kohanga .navs. Mena he kohanga .nav, .activeka noho ano ona matua .active. Panukuhia te waahi ki te taha o te pae whakaterenga ka matakitaki i te huringa o te akomanga hohe.

Te nama take 1

Te nama take 1-1

Te nama take 1-2

Te nama take 2

Te nama take 3

Te nama take 3-1

Te nama take 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>

Tauira me te roopu-rarangi

Ka mahi ano a Scrollspy me .list-groups. Panukuhia te waahi ki te taha o te roopu rarangi ka matakitaki i te huringa o te akomanga kaha.

Te nama take 1 Te nama take 2 Te nama take 3 Te nama take 4

Te nama take 1

Te nama take 2

Te nama take 3

Te nama take 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>

Whakamahinga

Ma nga huanga raraunga

Kia ngawari te taapiri i te whanonga scrollspy ki to whakatere pae runga, taapiri atu data-bs-spy="scroll"ki te huānga e hiahia ana koe ki te tutei (te nuinga ko te <body>). Na ka taapirihia te data-bs-targethuanga me te ID, te karaehe ranei o te huānga matua o tetahi .navwaahanga 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>

Ma te JavaScript

Whai muri i te taapiri position: relative;i to CSS, waeahia te scrollspy ma te JavaScript:

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

Ko nga whaainga ID ka taea te whakatau

Ko nga hononga Navbar me whai tohu id ka taea te whakatau. Hei tauira, <a href="#home">home</a>me rite ki tetahi mea i roto i te DOM rite <div id="home"></div>.

Ko nga huānga ūnga kore-kitea i arohia

Ko nga huānga whainga karekau e kitea ka waihotia, ka kore rawa e miramirahia o raatau taonga nav e rite ana.

Nga tikanga

whakamau

Ina whakamahi i te scrollspy me te taapiri, te tango ranei i nga huānga mai i te DOM, me waea koe ki te tikanga whakahou penei:

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

tuku

Ka whakangaro i te panuku o tetahi huānga. (Tangohia ai nga raraunga rongoa i te huānga DOM)

getInstance

Tikanga pateko e taea ai e koe te tiki i te tauira scrollspy e hono ana ki tetahi huānga DOM

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

getOrCreateInstance

Tikanga pateko e taea ai e koe te tiki i te tauira scrollspy e hono ana ki tetahi huānga DOM, ki te hanga i tetahi mea hou mena kaore i arawhitia

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

Kōwhiringa

Ko nga whiringa ka taea te tuku ma nga huanga raraunga, JavaScript ranei. Mo nga huanga raraunga, apitihia te ingoa whiringa ki data-bs-, penei i te data-bs-offset="".

Ingoa	Momo	Taunoa	Whakaahuatanga
`offset`	tau	`10`	Pika hei whakatiki mai i runga i te tatau i te waahi o te panuku.
`method`	aho	`auto`	Ka kimihia ko tehea waahanga kei roto te huānga torotoro. `auto`ka kowhiria te huarahi tino pai ki te tiki taunga panuku. `offset`ka whakamahi i te `Element.getBoundingClientRect()`tikanga ki te tiki taunga panuku. `position`ka whakamahi i te `HTMLElement.offsetTop`me `HTMLElement.offsetLeft`nga taonga ki te tiki taunga panuku.
`target`	aho \| ahanoa jQuery \| Huānga DOM		Tautuhi huānga ki te tono Scrollspy mono.

Nga huihuinga

Momo takahanga	Whakaahuatanga
`activate.bs.scrollspy`	Ka puhipuhi tenei takahanga ki te huānga panuku i nga wa katoa ka whakahohehia e te scrollspy tetahi mea hou.

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

Scrollspy

Pehea te mahi

Nga ipu ka taea te panuku me te uru papapātuhi

Tauira i roto i te navbar

Pane tuatahi

Pane tuarua

Upoko tuatoru

Upoko tuawha

Upoko tuarima

Tauira me te nav kohanga

Te nama take 1

Te nama take 1-1

Te nama take 1-2

Te nama take 2

Te nama take 3

Te nama take 3-1

Te nama take 3-2

Tauira me te roopu-rarangi

Te nama take 1

Te nama take 2

Te nama take 3

Te nama take 4

Whakamahinga

Ma nga huanga raraunga

Ma te JavaScript

Ko nga whaainga ID ka taea te whakatau

Ko nga huānga ūnga kore-kitea i arohia

Nga tikanga

whakamau

tuku

getInstance

getOrCreateInstance

Kōwhiringa

Nga huihuinga