Scrollspy

Hloov kho Bootstrap navigation lossis sau npe pawg raws li txoj haujlwm scroll los qhia tias qhov txuas twg tam sim no muaj nyob hauv qhov chaw saib.

Ntawm nplooj ntawv no

Nws ua haujlwm li cas

Scrollspy toggles cov .activechav kawm ntawm thauj tog rau nkoj ( <a>) cov ntsiab lus thaum lub caij nrog cov idhais los ntawm lub thauj tog rau nkoj hrefyog scrolled rau hauv saib. Scrollspy yog qhov zoo tshaj plaws siv los ua ke nrog Bootstrap nav tivthaiv lossis npe pawg , tab sis nws kuj tseem yuav ua haujlwm nrog cov khoom thauj tog rau nkoj hauv nplooj ntawv tam sim no. Nov yog qhov nws ua haujlwm li cas.

Txhawm rau pib, scrollspy yuav tsum muaj ob yam: navigation, pab pawg, lossis cov kab txuas yooj yim, ntxiv rau lub thawv scrollable. Lub thawv scrollable tuaj yeem yog cov khoom siv <body>los yog kev cai nrog lub teeb heightthiab overflow-y: scroll.
Nyob rau hauv lub thawv scrollable, ntxiv data-bs-spy="scroll"thiab data-bs-target="#navId"qhov twg navIdyog qhov tshwj xeeb idntawm kev sib txuas navigation. Nco ntsoov kuj suav nrog tabindex="0"kom paub meej cov keyboard nkag.
Raws li koj scroll lub thawv "spied", ib .activechav kawm ntxiv thiab tshem tawm los ntawm kev sib txuas thauj tog rau nkoj hauv cov kev sib txuas. Cov ntawv txuas yuav tsum muaj idlub hom phiaj daws tau, txwv tsis pub lawv tsis quav ntsej. Piv txwv li, ib qho <a href="#home">home</a>yuav tsum sib haum rau qee yam hauv DOM nyiam<div id="home"></div>
Lub hom phiaj cov ntsiab lus uas tsis pom yuav raug ignored. Saib cov ntsiab lus tsis pom hauv qab no.

Piv txwv

Scroll thaj tsam hauv qab ntawm navbar thiab saib qhov hloov pauv hauv chav kawm. Qhib cov ntawv qhia zaub mov dropdown thiab saib cov khoom dropdown tseem ceeb thiab.

Thawj nqe lus

Nov yog qee qhov chaw muab cov ntsiab lus rau nplooj ntawv scrollspy. Nco ntsoov tias thaum koj nqes mus rau nplooj ntawv, qhov tsim nyog navigation txuas yog tseem ceeb. Nws rov ua dua thoob plaws hauv qhov piv txwv. Peb pheej ntxiv qee qhov piv txwv ntxiv ntawm no los hais txog qhov scrolling thiab highlighting.

Ob nqe lus

Peb lub taub hau

Plaub nqe lus

Tshooj tsib

<nav id="navbar-example2" class="navbar bg-light px-3 mb-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-root-margin="0px 0px -40%" data-bs-smooth-scroll="true" class="scrollspy-example bg-light p-3 rounded-2" 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>

Nested nav

Scrollspy kuj ua haujlwm nrog nested .navs. Yog ib lub zes .nav, .activenws niam nws txiv kuj yuav .active. Scroll qhov chaw nyob ib sab ntawm lub navbar thiab saib qhov hloov pauv hauv chav kawm.