Bootstrap 4 – Nav – Hiding extra menu items

Bootstrap 4 – Nav – Hiding extra menu items

I have a Bootstrap 4 layout similar to this:
https://www.codeply.com/go/yLO99L66MD
When there are too many nav items, I want them to be hidden, so I added this: nav {overflow:hidden}. This does the job, but the problem is that it also hides my dropdown menu. How can I hide extra menu items but still allow dropdowns to show up for visible items?

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All you get is this text and a mostly barebones HTML document.

Solutions/Answers:

Solution 1:

You can use the navbar as this given example.

When you resize the browser the nav items will be moved inside to the drop-down if it not have an enough space.

Demo

[1]: http://jsfiddle.net/swasatz/3fn4d5oq/

Snippet Demo

Open the snippet in full page mode and resize the browser to see the changes.

$(document).ready(function () {
    var menu = $("#nav-bar-filter"),
        subMenu = $(".subfilter"),
        more = $("#more-nav"),
        parent = $(".filter-wrapper"),
        ww = $(window).width(),
        smw = more.outerWidth();

    menu.children("li").each(function () {
        var w = $(this).outerWidth();
        if (w > smw) smw = w + 20;
        return smw
    });
    more.css('width', smw);

    function contract() {
        var w = 0,
            outerWidth = parent.width() - smw - 50;
        for (i = 0; i < menu.children("li").size(); i++) {
            w += menu.children("li").eq(i).outerWidth();
            if (w > outerWidth) {
                menu.children("li").eq(i - 1).nextAll()
                    .detach()
                    .css('opacity', 0)
                    .prependTo(".subfilter")
                    .stop().animate({
                    'opacity': 1
                }, 300);
                break;
            }
        }
    }

    function expand() {
        var w = 0,
            outerWidth = parent.width() - smw - 20;
        menu.children("li").each(function () {
            w += $(this).outerWidth();
            return w;
        });
        for (i = 0; i < subMenu.children("li").size(); i++) {
            w += subMenu.children("li").eq(i).outerWidth();
            if (w > outerWidth) {
                var a = 0;
                while (a < i) {
                    subMenu.children("li").eq(a)
                        .css('opacity', 0)
                        .detach()
                        .appendTo("#nav-bar-filter")
                        .stop().animate({
                        'opacity': 1
                    }, 300);
                    a++;
                }
                break;
            }
        }
    }
    contract();

    $(window).on("resize", function (e) {
        ($(window).width() > ww) ? expand() : contract();
        ww = $(window).width();
    });

});
body {
    font-family: verdana;
    min-width: 250px;
}
ul#more-nav, ul#nav-bar-filter {
    display: inline-block;
    vertical-align: top;
}
ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
}
li {
    padding: 4px 8px 4px 8px;
    margin: 0;
}
#nav-bar-filter li {
    display: inline-block;
    font-weight: bold;
}
a {
    text-decoration: none;
    color: #666;
    font-size: 13px;
}
.filter-wrapper {
    width: 100%;
    background: #eee;
    padding: 5px 10px 5px 10px;
}
#more-nav {
    float: right;
}
.subfilter{
    padding-top: 10px;
}
.subfilter li {
    margin: 0 0 0 20px;
    padding: 5px 0 0 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="twelve columns filter-wrapper">
    <ul class="nav-bar-filter" id="nav-bar-filter">
        <li><a href="#">All</a> 
        </li>
        <li><a href="#">Small</a>

        </li>
        <li><a href="#">Medium</a>

        </li>
        <li><a href="#">Extra large</a>

        </li>
        <li><a href="#">Text</a>

        </li>
        <li><a href="#">Small-1</a>

        </li>
        <li><a href="#">Medium-1</a>

        </li>
        <li><a href="#">Extra large text</a>

        </li>
        <li><a href="#">Large text</a>

        </li>
        <li><a href="#">Another text</a>

        </li>
        <li><a href="#">text</a>

        </li>
    </ul>
    <ul id="more-nav">
        <li><b><a href="#">More &gt;</a></b>

            <ul class="subfilter"></ul>
        </li>
    </ul>
</div>

Solution 2:

For the menu-items that you would like to view as hidden on mobile devices, wrap a span around the list-item(s) that you want hidden and add the bootstrap 4 beta hidden values, like this.

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<span class="d-none d-xs-block">
  <li class="nav-item">
    <a class="nav-link" href="#">aaaaaaaa 1234 </a>
  </li>
</span>

You can also apply the class to an <a> tag to hide that specific link within the drop-down menu. Furthermore, tinker with the d-xs-block class to meet your specifications.

I would like to provide you with a couple of sources to help guide you with regards to hiding elements at specific breakpoints.

Solution 3:

(UPDATED ANSWER) You can use jQuery to show nav menus that fit within window and hide the rest:

jQuery:

$(window).resize(function() {
    var winwidth=$(window).width(),totwidth=$('.navbar .navbar-brand').outerWidth(),shownnum=0;
    var navs=$('.navbar .nav-item');
    navs.each(function(i) {
        totwidth+=$(this).outerWidth();
        if(totwidth<winwidth) shownnum=i+1; else return false;
    });
    navs.show().slice(shownnum).hide();
});

CSS:

.navbar {overflow:hidden}
.nav-item {white-space:nowrap}

Fiddle: https://www.bootply.com/59hJN5jFZo

Solution 4:

The following fragment implements a “mega menu” (similar to Yamm3 Megamenu for Bootstrap 3, cf. http://geedmo.github.io/yamm3/) based on Bootstrap 4’s flexbox classes:

<!-- adapted from bs-repo basic navbar example code -->
<nav id="navbar" class="navbar navbar-expand-lg navbar-light bg-light">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler" type="button"
          data-toggle="collapse" data-target="#navbarSupportedContent">
    <span class="navbar-toggler-icon"></span>
  </button>
  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Other</a>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="..."
           id="navbarDropdownMenuLink" data-toggle="dropdown">
          Dropdown link
        </a>
        <div class="dropdown-menu">
          <ul class="d-md-inline-flex flex-md-row">
            <li class="dropdown-item">
              <ul class="d-md-inline-flex flex-md-column">
                <li class="dropdown-item"><a href="#">Action</a></li>
                <li class="dropdown-item"><a href="#">Another</a></li>
                <li class="dropdown-item"><a href="#">Another</a></li>
              </ul>
            </li>
            <li class="dropdown-item">
              <ul class="d-md-inline-flex flex-md-column">
                <li class="dropdown-item"><a href="#">Action</a></li>
                <li class="dropdown-item"><a href="#">Another</a></li>
                <li class="dropdown-item"><a href="#">Another</a></li>
              </ul>
            </li>
            <li class="dropdown-item">
              <ul class="d-md-inline-flex flex-md-column">
                <li class="dropdown-item"><a href="#">Action</a></li>
                <li class="dropdown-item"><a href="#">Another</a></li>
                <li class="dropdown-item"><a href="#">Another</a></li>
              </ul>
            </li>
          </ul>
        </div>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="text"
             placeholder="Search">
      <button class="btn btn-outline-success my-2 my-sm-0"
              type="submit">Search</button>
    </form>
  </div>
</nav>

Compared to Bootstrap’s basic navbar example, there’s another div here for the dropdown-menu containing the ul making up the menu since display: flex doesn’t go with display: none as dynamically set by Bootstrap’s dropdown support script (popper.js).

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This variant applies flex row layout on md resolutions and up, while applying plain unordered-list formatting on resolutions below-md.

Solution 5:

Here is another option for Bootstrap 4 that will collapse the extra Navbar items into a dropdown menu on the right side. Use some logic (this is using jQuery) to control the placement of items in the menu…

function (menu,maxHeight) {

    var nav = $(menu);

    // check height of menu
    var navHeight = nav.innerHeight();

    // when the height is taller the navbar has wrapped onto 2 lines
    if (navHeight >= maxHeight) {
        $(menu + ' .dropdown').removeClass('d-none');
        $(".navbar-nav").removeClass('w-auto').addClass("w-100");
        while (navHeight > maxHeight) {
            //  add child to dropdown
            var children = nav.children(menu + ' li:not(:last-child)');
            var count = children.length;
            $(children[count - 1]).prependTo(menu + ' .dropdown-menu');
            navHeight = nav.innerHeight();
        }
        $(".navbar-nav").addClass("w-auto").removeClass('w-100');
    }
    else {
        var collapsed = $(menu + ' .dropdown-menu').children(menu + ' li');

        if (collapsed.length===0) {
          $(menu + ' .dropdown').addClass('d-none');
        }

        while (navHeight < maxHeight && (nav.children(menu + ' li').length > 0) && collapsed.length > 0) {
            //  remove child from dropdown
            collapsed = $(menu + ' .dropdown-menu').children('li');
            $(collapsed[0]).insertBefore(nav.children(menu + ' li:last-child'));
            navHeight = nav.innerHeight();
        }

        if (navHeight > maxHeight) { 
            autocollapse(menu,maxHeight);
        }
    }
}

https://www.codeply.com/go/IETSah3bFG

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Solution 6:

increase width of div or break menu after hiding menu.

References