Bootstrap4滑动侧边栏特效

PetitQ 导航菜单 2018-10-20 6.16K 0 2

这是一款基于 bootstrap4 的滑动侧边栏特效。该滑动侧边栏使用 bootstrap4 框架，通过 css 和 jquery 来完成隐藏侧边栏，当点击打开侧边栏按钮时，侧边栏会以动画的方式滑动出来。
使用方法：
在页面中引入 jquery 和 bootstrap4 相关文件。

<link href="css/bootstrap.min.css" rel="stylesheet">

<script src="js/jquery-1.11.0.min.js" type="text/javascript"></script>

<script src="js/bootstrap.min.js"></script>

也想出现在这里？联系我们吧

HTML 结构：

侧边栏的 HTML 结构如下：

<nav class="navbar navbar-expand-md navbar-dark bg-dark navbar-offcanvas">

```
  <div class="container-fluid">
```

      <a class="navbar-brand" href="#">Navbar</a>

      <ul class="navbar-nav navbar-top">

```
          <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="#">Link</a>

```
          </li>
```
```
      </ul>
```

      <button class="navbar-toggler navbar-toggler-right navbar-icon" type="button" data-toggle="collapse" data-target="#navbar-mobile" aria-controls="navbar-mobile" aria-expanded="false" aria-label="Toggle navigation">

          <span class="icon-bar bar1"></span>

          <span class="icon-bar bar2"></span>

          <span class="icon-bar bar3"></span>

```
      </button>
```

      <div class="navbar-collapse collapse ml-auto" id="navbar-mobile">

          <ul class="navbar-nav ml-auto">

```
              <li class="nav-image">
```

                  <img src="logo.png" alt="">

```
              </li>
```
```
              <li class="nav-item">
```

                  <a href="#!" class="nav-link">Link 1</a>

```
              </li>
```
```
              <li class="nav-item">
```

                  <a href="#!" class="nav-link">Link 2</a>

```
              </li>
```
```
              <li class="nav-item">
```

                  <a href="#!" class="nav-link">Link 3</a>

```
              </li>
```
```
          </ul>
```
```
      </div>
```
```
  </div>
```
```
</nav>
```

页面的内容放置在 wrapperclass 的 div 容器中。

```
<div class="wrapper">
```
```
  ...
```
```
</div>
```

CSS 样式：

为侧边栏添加下面的 CSS 样式。

.wrapper { transition: all 0.5s cubic-bezier(0.685, 0.0473, 0.346, 1); }

```
 
```
```
.navbar {
```
```
  height: 75px;
```
```
  transition: all .5s .1s;
```
```
}
```
```
 
```
```
.navbar-offcanvas { z-index: 1030; }
```
```
 
```
```
.navbar-offcanvas .container-fluid {
```
```
  position: relative;
```
```
  padding: 0;
```
```
  transform: translate3d(0px, 0, 0);
```

  transition: all 0.5s cubic-bezier(0.685, 0.0473, 0.346, 1);

```
}
```
```
 
```

.navbar-offcanvas .navbar-top { display: none; }

```
@media (min-width: 992px) {
```
```
 
```
```
.navbar-offcanvas .navbar-top {
```
```
  display: flex;
```
```
  margin-left: auto;
```
```
}
```
```
}
```
```
 
```

.navbar-offcanvas .navbar-top .nav-item {

```
  margin-right: 22px;
```
```
  text-align: center;
```
```
}
```
```
 
```
```
@media (max-width: 991px) {
```
```
 
```

.navbar-offcanvas .navbar-top .nav-item .nav-link { color: #000; }

```
}
```
```
 
```
```
.navbar-offcanvas .navbar-toggler {
```
```
  padding: 0;
```
```
  border: 0;
```
```
  outline: none;
```
```
}
```
```
 
```

.navbar-offcanvas .navbar-toggler:hover, .navbar-offcanvas .navbar-toggler:focus { cursor: pointer; }

```
 
```
```
@media (min-width: 768px) {
```
```
 
```

.navbar-offcanvas .navbar-toggler { display: block; }

```
}
```
```
 
```

.navbar-offcanvas .navbar-toggler .icon-bar {

```
  display: block;
```
```
  position: relative;
```
```
  width: 24px;
```
```
  height: 2px;
```
```
  border-radius: 1px;
```
```
  background-color: #fff;
```
```
}
```
```
 
```

.navbar-offcanvas .navbar-toggler .icon-bar + .icon-bar { margin-top: 4px; }

```
 
```

.navbar-offcanvas .navbar-toggler .icon-bar.bar1 {

```
  top: 0;
```
```
  outline: 1px solid transparent;
```
```
  animation: topbar-back 500ms 0s;
```
```
  animation-fill-mode: forwards;
```
```
}
```
```
 
```

.navbar-offcanvas .navbar-toggler .icon-bar.bar2 {

```
  outline: 1px solid transparent;
```
```
  opacity: 1;
```
```
}
```
```
 
```

.navbar-offcanvas .navbar-toggler .icon-bar.bar3 {

```
  bottom: 0;
```
```
  outline: 1px solid transparent;
```
```
  animation: bottombar-back 500ms 0s;
```
```
  animation-fill-mode: forwards;
```
```
}
```
```
 
```

.navbar-offcanvas .navbar-toggler.toggled .icon-bar.bar1 {

```
  top: 6px;
```
```
  animation: topbar-x 500ms 0s;
```
```
  animation-fill-mode: forwards;
```
```
}
```
```
 
```

.navbar-offcanvas .navbar-toggler.toggled .icon-bar.bar2 { opacity: 0; }

```
 
```

.navbar-offcanvas .navbar-toggler.toggled .icon-bar.bar3 {

```
  bottom: 6px;
```
```
  animation: bottombar-x 500ms 0s;
```
```
  animation-fill-mode: forwards;
```
```
}
```
```
 
```

.navbar-offcanvas .navbar-collapse.collapse, .navbar-offcanvas .navbar-collapse.collapse.in, .navbar-offcanvas .navbar-collapse.collapsing { display: none !important; }

```
 
```

.nav-open .navbar-collapse { transform: translate3d(0px, 0, 0); }

```
 
```

.nav-open .navbar > .container-fluid { transform: translate3d(-424px, 0, 0); }

```
 
```
```
@media (max-width: 991px) {
```
```
 
```

.nav-open .navbar > .container-fluid { transform: translate3d(-282.6666666667px, 0, 0); }

```
}
```
```
 
```

.nav-open .wrapper { transform: translate3d(-150px, 0, 0); }

```
 
```
```
body > .navbar-collapse {
```
```
  display: block !important;
```
```
  position: fixed;
```
```
  top: 0;
```
```
  right: -10px;
```
```
  width: 424px;
```
```
  height: 100%;
```
```
  padding: 60px 1rem;
```
```
  background-color: #fff;
```
```
  border-left: 1px solid #e3e3e3;
```
```
  text-align: center;
```
```
  visibility: visible;
```
```
  overflow-y: visible;
```
```
  transform: translate3d(424px, 0, 0);
```

  transition: all 0.5s cubic-bezier(0.685, 0.0473, 0.346, 1);

```
  z-index: 1032;
```
```
}
```
```
 
```
```
body > .navbar-collapse:after {
```
```
  content: "";
```
```
  position: absolute;
```
```
  top: 28px;
```
```
  left: -20px;
```
```
  border-left: 10px solid #fff;
```
```
  border-top: 10px solid transparent;
```

  border-bottom: 10px solid transparent;

```
  border-right: 10px solid transparent;
```
```
  transform: rotate(180deg);
```

  transition: all 0.5s cubic-bezier(0.685, 0.0473, 0.346, 1);

```
  z-index: 1032;
```
```
}
```
```
 
```
```
@media (max-width: 991px) {
```
```
 
```

body > .navbar-collapse { width: 282.6666666667px; }

```
}
```
```
 
```

body > .navbar-collapse .nav-image { margin-bottom: 65px; }

```
 
```

body > .navbar-collapse .nav-image img {

```
  display: block;
```
```
  margin: 0 auto;
```

  border: 1px solid rgba(0, 0, 0, 0.14);

```
  width: 91px;
```
```
  height: 69px;
```
```
}
```
```
 
```
```
body > .navbar-collapse .navbar-top {
```
```
  margin: 0 !important;
```
```
  flex-direction: column;
```
```
}
```
```
 
```
```
@media (min-width: 992px) {
```
```
 
```

body > .navbar-collapse .navbar-top { display: none; }

```
}
```
```
 
```

body > .navbar-collapse .navbar-top li { text-align: center; }

```
 
```

body > .navbar-collapse .navbar-top li a {

```
  display: block;
```
```
 padding: .5rem 1rem;
```
```
  font-weight: 700;
```
```
  color: #000;
```
```
}
```
```
 
```

body > .navbar-collapse .navbar-top li a:hover, body > .navbar-collapse .navbar-top li a:focus { text-decoration: none; }

```
 
```

body > .navbar-collapse .nav-link, body > .navbar-collapse .dropdown-toggle {

```
  font-weight: 700;
```
```
  color: #222;
```
```
  transition: color .2s ease-out;
```
```
}
```
```
 
```

body > .navbar-collapse .nav-link:hover, body > .navbar-collapse .nav-link:focus, body > .navbar-collapse .dropdown-toggle:hover, body > .navbar-collapse .dropdown-toggle:focus { text-decoration: none; }

```
 
```

body > .navbar-collapse .nav-link.disabled, body > .navbar-collapse .dropdown-toggle.disabled { color: rgba(0, 0, 0, 0.35); }

```
 
```

body > .navbar-collapse .nav-link.disabled:hover, body > .navbar-collapse .nav-link.disabled:focus, body > .navbar-collapse .dropdown-toggle.disabled:hover, body > .navbar-collapse .dropdown-toggle.disabled:focus { cursor: not-allowed; }

```
 @media (min-width: 992px) {
```
```
 
```
```
body > .navbar-top { display: none; }
```
```
}
```
```
 
```
```
body > #overlay {
```
```
  content: "";
```
```
  position: fixed;
```
```
  top: 0;
```
```
  left: auto;
```
```
  right: calc(282.6666666667px - 10px);
```
```
  width: 100%;
```
```
  height: 100%;
```
```
  opacity: 0;
```
```
  overflow-x: hidden;
```
```
  z-index: 1029;
```
```
}
```
```
 
```
```
@media (min-width: 992px) {
```
```
 
```

body > #overlay { right: calc(424px - 10px); }

```
}
```
```
 
```
```
@keyframes 
```
```
topbar-x {  0% {
```
```
 top: 0px;
```
```
 transform: rotate(0deg);
```
```
}
```
```
 45% {
```
```
 top: 6px;
```
```
 transform: rotate(145deg);
```
```
}
```
```
 75% {
```
```
 transform: rotate(130deg);
```
```
}
```
```
 100% {
```
```
 transform: rotate(135deg);
```
```
}
```
```
}
```
```
 
```
```
@keyframes 
```
```
topbar-back {  0% {
```
```
 top: 6px;
```
```
 transform: rotate(135deg);
```
```
}
```
```
 45% {
```
```
 transform: rotate(-10deg);
```
```
}
```
```
 75% {
```
```
 transform: rotate(5deg);
```
```
}
```
```
 100% {
```
```
 top: 0px;
```
```
 transform: rotate(0);
```
```
}
```
```
}
```
```
 
```
```
@keyframes 
```
```
bottombar-x {  0% {
```
```
 bottom: 0px;
```
```
 transform: rotate(0deg);
```
```
}
```
```
 45% {
```
```
 bottom: 6px;
```
```
 transform: rotate(-145deg);
```
```
}
```
```
 75% {
```
```
 transform: rotate(-130deg);
```
```
}
```
```
 100% {
```
```
 transform: rotate(-135deg);
```
```
}
```
```
}
```
```
 
```
```
@keyframes 
```
```
bottombar-back {  0% {
```
```
 bottom: 6px;
```
```
 transform: rotate(-135deg);
```
```
}
```
```
 45% {
```
```
 transform: rotate(10deg);
```
```
}
```
```
 75% {
```
```
 transform: rotate(-5deg);
```
```
}
```
```
 100% {
```
```
 bottom: 0px;
```
```
 transform: rotate(0);
```
```
}
```
```
}
```

CSS 样式：

最后通过下面的 js 代码来完成侧边栏的显示和隐藏。

```
var window_height;
```
```
var window_width;
```
```
var navbar_initialized = false;
```
```
var nav_toggle;
```
```
 
```
```
var offCanvas = {
```
```
    sidenav: {
```

        // Sidenav is not visible by default.

```
        // Change to 1 if necessary
```
```
        sidenav_visible: 0
```
```
    },
```

    initSideNav: function initSideNav() {

```
        if (!navbar_initialized) {
```
```
            var $nav = $('nav');
```
```
 
```

            // Add the offcanvas class to the navbar if it's not initialized

            $nav.addClass('navbar-offcanvas');

```
 
```
```
            // Clone relevant navbars
```

            var $navtop = $nav.find('.navbar-top').first().clone(true);

            var $navbar = $nav.find('.navbar-collapse').first().clone(true);

```
 
```

            // Let's start with some empty vars

```
            var ul_content = '';
```
```
            var top_content = '';
```
```
 
```

            // Set min-height of the new sidebar to the screen height

            $navbar.css('min-height', window.screen.height);

```
 
```

            // Take the content of .navbar-top

```
            $navtop.each(function() {
```

                var navtop_content = $(this).html();

                top_content = top_content + navtop_content;

```
            });
```
```
 
```

            // Take the content of .navbar-collapse

            $navbar.children('ul').each(function() {

                var nav_content = $(this).html();

                ul_content = ul_content + nav_content;

```
            });
```
```
 
```

            // Wrap the new content inside an <ul>

            ul_content = '<ul class="navbar-nav sidebar-nav">' + ul_content + '</ul>';

```
 
```

            // Insert the html content into our cloned content

```
            $navbar.html(ul_content);
```
```
            $navtop.html(top_content);
```
```
 
```

            // Append the navbar to body,

            // and insert the content of the navicons navbar just below the logo/nav-image

```
            $('body').append($navbar);
```

            $('.nav-image').after($navtop);

```
 
```
```
 
```

            // Set the toggle-variable to the Bootstrap navbar-toggler button

            var $toggle = $('.navbar-toggler');

```
 
```

            // Add/remove classes on toggle and set the visiblity of the sidenav,

            // and append the overlay. Also if the user clicks the overlay,

```
            // the sidebar will close
```

            $toggle.on('click', function () {

                if (offCanvas.sidenav.sidenav_visible == 1) {

                    $('html').removeClass('nav-open');

                    offCanvas.sidenav.sidenav_visible = 0;

                    $('#overlay').remove();

                    setTimeout(function() {

                        $toggle.removeClass('toggled');

```
                    }, 300);
```
```
                } else {
```

                    setTimeout(function() {

                        $toggle.addClass('toggled');

```
                    }, 300);
```
```
 
```

                    // Add the overlay and make it close the sidenav on click

                    var div = '<div id="overlay"></div>';

                    $(div).appendTo("body").on('click', function() {

                        $('html').removeClass('nav-open');

                        offCanvas.sidenav.sidenav_visible = 0;

                        $('#overlay').remove();

                        setTimeout(function() {

                            $toggle.removeClass('toggled');

```
                        }, 300);
```
```
                    });
```
```
 
```

                    $('html').addClass('nav-open');

                    offCanvas.sidenav.sidenav_visible = 1;

```
                }
```
```
            });
```

            // Set navbar to initialized

```
            navbar_initialized = true;
```
```
        }
```
```
    }
```
```
};
```
```
 
```
```
$(document).ready(function () {
```
```
    window_width = $(window).width();
```
```
 
```

    nav_toggle = $('nav').hasClass('navbar-offcanvas') ? true : false;

```
 
```

    if (window_width < 992 || nav_toggle) {

```
        offCanvas.initSideNav();
```
```
    }
```
```
 
```

    // Close the sidebar if the user clicks a link or a dropdown-item,

```
    // and close the sidebar
```

    $('.nav-link:not(.dropdown-toggle), .dropdown-item').on('click', function () {

        var $toggle = $('.navbar-toggler');

```
 
```

        $('html').removeClass('nav-open');

        offCanvas.sidenav.sidenav_visible = 0;

```
        setTimeout(function () {
```

            $toggle.removeClass('toggled');

```
        }, 300);
```
```
    });
```
```
});
```
```
 
```
```
$(window).resize(function () {
```
```
    window_width = $(window).width();
```
```
 
```

    // More responsive checks if the user resize the browser

```
    if (window_width < 992) {
```
```
        offCanvas.initSideNav();
```
```
    }
```
```
 
```

    if (window_width > 992 && !nav_toggle) {

        $('nav').removeClass('navbar-offcanvas');

        offCanvas.sidenav.sidenav_visible = 1;

```
        navbar_initialized = false;
```
```
    }
```
```
});
```

该 bootstrap4 滑动侧边栏特效的 codepen 地址为：https://codepen.io/moso/pen/LjvRep

Bootstrap4 滑动侧边栏特效

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Bootstrap4滑动侧边栏特效

HTML 结构：

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CSS 样式：

Bootstrap4 滑动侧边栏特效

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