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javascript - Bootstrap Scrollspy 导致 Off-Canavas 菜单出现问题

转载 作者：可可西里 更新时间：2023-11-01 02:46:21 24 4
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UPDATE: To clear up some confusion I added a fiddle that demonstrates how it is supposed to work, but it is just missing the scrollspy: https://jsfiddle.net/kmdLg7t0/ How can I add the scrollspyto this fiddle so that the menu highlights when I'm on a specific section?

我创建了一个固定的左侧菜单，该菜单在平板电脑和手机的浏览器宽度为 <992px。当我选择浏览器宽度为 >992px 的 anchor 链接时，它会关闭菜单并导航到 anchor 链接部分。

自定义 JQuery 代码:这是我的自定义 jQuery 代码，它在我单击 anchor 链接时关闭 Off-Canvas 菜单:

// close off-canvas menu and navigate to anchor
$('.navmenu-nav li a').on('click', function() {
  $('body').removeClass('bs.offcanvas');
});

问题:

我决定添加一个bootstrap offscrollspy，它在浏览器宽度大于 992px 后按预期工作，但是当我将浏览器宽度调整为小于 992px 时，这会干扰自定义 Jquery 代码以关闭菜单并导航到 anchor 链接。

这是 fiddle :

Bootstrap ScrollSpy causes issue with Off Canvas Menu and JQuery Code

My GUESS: I'm guessing the solution to this problem is to use jquery or javascript to prevent or remove the data-target=".navmenu" from activating when my screen is less than the <992px. Or we can find a way to only activate the scrollspy after >992px. I'm currently trying to figure this out, but I need someone who is a true expert in jquery to solve this dilemma.

先决条件:

  • Bootstrap.min.css
  • Bootstrap.min.js
  • jasny-bootstrap.css
  • jasny-bootstrap.js

JS:

$(document).ready(function () {
  toggleOffcanvas($(window).width() <= 992);
});

// simulate modal opening
$('.nav-link').click(function() {
  if ($(window).width() > 992) {
    $('.backdrop').hide(0, false);
  }

    $('#navToggle').click();
});

$('.navmenu').on('show.bs.offcanvas', function() {
    if ($(window).width() <= 992) {
        $('.backdrop').fadeIn();
  }
});

$('.navmenu').on('hide.bs.offcanvas', function() {
    if ($(window).width() <= 992) {
        $('.backdrop').fadeOut();
  }
});

// close modal on resize
$(window).resize(function() {
  if ($(window).width() > 992) {
    $('.backdrop').hide(0, false);
    $('body').removeClass('bs.offcanvas');
  }

  toggleOffcanvas($(window).width() <= 992);
});

// switch active navigation link onclick
$('.nav a').on('click', function() {
  $('.nav').find('.active').removeClass('active');
  $(this).parent().addClass('active');
});

// close modal when navigating to anchor
$('.navmenu-nav li a').on('click', function() {
  $('body').removeClass('bs.offcanvas');
});

function toggleOffcanvas(condition) {
    if (!! condition) {
    $('.nav-link').attr('data-toggle', 'offcanvas');
  } else {
    $('.nav-link').removeAttr('data-toggle');
  }
}

html:

<body data-spy="scroll" data-target="#myScrollspy" data-offset="50">


<div class="backdrop"></div>

<div id="myScrollspy" class="navmenu navmenu-default navmenu-fixed-left offcanvas-sm colornav ">
<a href="#" class="close" data-toggle="offcanvas" data-target=".navmenu">&times;</a>
 <a id="navToggle" class=""><span></span></a>
  <h4 class="navmenu-brand visible-md visible-lg visible-sm visible-xs" href="#">2017</h4>
  <ul class="nav navmenu-nav">
    <li class="active"><a class="nav-link" data-toggle="offcanvas" data-target=".navmenu" href="#january">Enero</a></li>
    <li><a class="nav-link" data-toggle="offcanvas" data-target=".navmenu" href="#february">Msrs</a></li>
    <li><a class="nav-link" href="http://www.jasny.net/bootstrap/examples/navmenu-reveal/">Jupiter</a></li>
    <li><a class="nav-link" href="http://www.jasny.net/bootstrap/examples/navbar-offcanvas/">Off canvas navbar</a></li>
  </ul>

</div>

<div class="navbar navbar-default navbar-fixed-top navbar-preheader">
  <button type="button" class="navbar-toggle" data-toggle="offcanvas" data-target=".navmenu">
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
    <span class="icon-bar"></span>
  </button>
  <a class="navbar-brand" href="#">navbar brand</a>



</div>

<div class="container">
  <div class="page-header">
    <h1>Navmenu Template</h1>
  </div>
  <p class="lead">This example shows the navmenu element. If the viewport is <b>less than 992px</b> the menu will be placed the off canvas and will be shown with a slide in effect.</p>
  <p>Also take a look at the examples for a navmenu with <a href="http://www.jasny.net/bootstrap/examples/navmenu-push">push effect</a> and <a href="http://www.jasny.net/bootstrap/examples/navmenu-reveal">reveal effect</a>.</p>
  <p class="space"></p>
  <p id="january">January</p>
  <p id="february">February</p>
</div><!-- /.container -->
</body>

CSS:

html, body {
  height: 100%;
}
body {
  padding: 50px 0 0 0;
}
.space {padding-bottom:900px;}

.backdrop {
  background: rgba(0, 0, 0, 0.5);
  position: fixed;
  top: 0;
  bottom: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1040;
  display: none;
}

.navbar-fixed-top {

  background:#fff!important;
}


.navbar {
  display: block;
  text-align: center;
}
.navbar-brand {
  display: inline-block;
  float: none; 
}
.navbar-toggle {
  position: absolute;
  float: left; 
  margin-left: 15px;
}

.container {
  max-width: 100%;
}

@media (min-width: 1px) {
  .navbar-toggle {
    display: block !important; background:none!important;  border:none !important; color:#f90 !important;
  }
}

@media (min-width: 992px) {
  body {
    padding: 30px 0 0 300px;
  }
  .navmenu {
    padding-top: 0; 
  }

.navbar-toggle {display:none!important;}
.close {display:none}


.navmenu-fixed-left {
  z-index:0;
  top: 48px;
  bottom: 0; background:#fff!important;
}

}

    .navbar-default .navbar-toggle .icon-bar{
       background-color:#333;
    }


.close {margin-right:10px; margin-top:10px;}

@media (max-width:991px) {



.navmenu-fixed-left {
  z-index:1050;
  top: 0;
  bottom: 0; background:#fff!important;
}


}

    .backdrop {display:none}

    #january, #february {
      text-transform: uppercase;
      background-color: red;
      text-align: center;
      line-height: 90vh;
      font-size: 5em;
      height: 90vh;
      color: white;
    }

    #february {
      background-color: green;
    }

最佳答案

代码的问题是菜单项上的 data-target=".navmenu" 破坏了 scrollspy 插件。基本上，scrollspy 通过 data-target 属性或href 属性在页面上的菜单项和元素之间建立连接。这是它的一部分 source code :

return `${selector}[data-target="${target}"],` +
       `${selector}[href="${target}"]`

因此，您不能在菜单链接上使用 data-target 来关闭菜单。您可以改用 javascript 来关闭菜单。

这是更新后的链接的 HTML:

<li class="active"><a class="nav-link" href="#january">Enero</a></li>
<li><a class="nav-link" href="#february">Msrs</a></li>

以及您需要的所有 javascript:

$(document).ready(function () {
  // Add the backdrop when menu is shown
  $('.navmenu').on('show.bs.offcanvas', function() {
    $('.backdrop').fadeIn();
  });

  // Remove the backdrop when menu is hidden
  $('.navmenu').on('hide.bs.offcanvas', function() {
    $('.backdrop').fadeOut();
  });

  // Hide the menu on menu item click
  $('.nav-link').click(function() {
    if ($(window).width() <= 992) {
      $('.navmenu').offcanvas('toggle');
    }
  });

  // Remove the backdrop if window is resized over the breakpoint
  $(window).resize(function () {
    if ($(window).width() > 992) {
      $('.backdrop').fadeOut();
    }
  });
});

一个完整的工作示例:

https://jsfiddle.net/kmdLg7t0/5/

最后，您必须从不需要的链接元素中删除所有 href="#"。例如，即使您已导航至 #january，关闭菜单按钮也会将您带回 #。

我总共做了这些事情:

  • 从链接中删除了 data- 属性
  • 点击链接时使用 javascript 关闭菜单
  • 从链接中删除了不必要的 href=#

其他一切都由插件自己处理。

关于javascript - Bootstrap Scrollspy 导致 Off-Canavas 菜单出现问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42004981/

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