javascript - How can I leave the animations in the mobile version of my navigation only -


i have animated footer navigation accordion style menu , have tried remove animation effects desktop version adding if statement identify whether window proper size, desktop size animates well. 'javascript media query' approach correct way this, or there better way?

$(function() {    var accordion = function(el, multiple) {      this.el = el || {};      this.multiple = multiple || false;        var link = this.el.find('.link');        if ($(window).width() > 960) {        link.on('click', {          el: this.el,          multiple: this.multiple        }, this.dropdown)      }    }      accordion.prototype.dropdown = function(e) {      var $el = e.data.el;      $this = $(this),        $next = $this.next();        $next.slidetoggle();        $this.parent().toggleclass('open');        if (!e.data.multiple) {        $el.find('.submenu').not($next).slideup().parent().removeclass('open');      }    }      var accordion = new accordion($('#accordion'), false);  });
.accordion {    width: 100%;    margin: 3em auto 2em;    background: #242935;    .link {      font-size: 0.85em;      font-weight: 700;      background: #242935;      color: #fff;      cursor: pointer;      padding: 15px 15px 15px 3em;      border-bottom: 1px solid #ccc;      display: block;      position: relative;    }    li {      position: absolute;      top: 12px;      left: 16px;      font-size: 1em;      color: #fff;    }  }  .submenu {    display: block;    background: #858f98;    font-size: 0.95em;    li {      border-bottom: 1px solid #4b4a5e;    }    {      display: block;      text-decoration: none;      color: #d9d9d9;      padding: 12px;      padding-left: 3.5em;    }  }  /*==========  non-mobile first method  ==========*/    /* large devices, wide screens */    @media screen , (min-width: 1200px) {}  /* medium devices, desktops */    /* portrait , landscape */    @media screen , (min-width: 960px) {    .accordion {      .link {        color: #fff;        cursor: pointer;        padding: 0;        border-bottom: 0;      }      li {        float: left;      }      li:last-child .link {        border-bottom: 0;      }      li {        display: none;      }    }    .submenu {      display: block !important;      float: left;      font-size: 0.95em;      position: relative;      li {        border-bottom: 0;        width: 100%;      }      {        color: #fff;        padding-left: 0;        text-decoration: none;      }    }  }  @media screen , (min-device-width: 375px) , (max-device-width: 667px) , (-webkit-min-device-pixel-ratio: 2) {    .accordion {      width: 100%;      margin: 3em auto 2em;      background: #242935;      .link {        font-size: 0.85em;        font-weight: 700;        background: #242935;        color: #fff;        cursor: pointer;        padding: 15px 15px 15px 3em;        border-bottom: 1px solid #ccc;        display: block;        position: relative;        -webkit-transition: 0.4s ease;        -moz-transition: 0.4s ease;        -moz-transition: 0.4s ease;        -o-transition: 0.4s ease;        transition: 0.4s ease;      }      li:last-child .link {        border-bottom: 0;      }      li {        position: absolute;        top: 12px;        left: 16px;        font-size: 1em;        color: #fff;        -webkit-transition: 0.4s ease;        -moz-transition: 0.4s ease;        -o-transition: 0.4s ease;        transition: 0.4s ease;      }      li.open i.fa-chevron-down {        -webkit-transform: rotate(180deg);        -moz-transform: rotate(180deg);        -ms-transform: rotate(180deg);        -o-transform: rotate(180deg);        transform: rotate(180deg);      }      li i.fa-chevron-down {        right: 12px;        left: auto;        font-size: 1.2em;      }    }    .submenu {      display: none;      background: #858f98;      font-size: 0.95em;      li {        border-bottom: 1px solid #4b4a5e;      }      {        display: block;        text-decoration: none;        color: #d9d9d9;        padding: 12px;        padding-left: 3.5em;        -webkit-transition: 0.25 ease;        -moz-transition: 0.25 ease;        -o-transition: 0.25 ease;        transition: 0.25 ease;      }    }  }  /* small devices, phones */    @media screen , (max-width: 480px) {}  /* custom, iphone retina */    @media screen , (max-width: 320px) {}
<ul id="accordion" class="accordion">    <div class="container-fluid">      <div class="row">        <li class="col-md-3 col-sm-12">          <div id="footer-heading" class="link">about<i class="fa fa-chevron-down"></i>          </div>          <ul class="submenu">            <li><a href="#">submenu 1</a>            </li>            <li><a href="#">submenu 1</a>            </li>            <li><a href="#">submenu 1</a>            </li>            <li><a href="#">submenu 1</a>            </li>          </ul>        </li>        <li class="col-md-3 col-sm-12">          <div id="footer-heading" class="link">services<i class="fa fa-chevron-down"></i>          </div>          <ul class="submenu">            <li><a href="#">submenu 2</a>            </li>            <li><a href="#">submenu 2</a>            </li>            <li><a href="#">submenu 2</a>            </li>            <li><a href="#">submenu 2</a>            </li>          </ul>        </li>        <li class="col-md-3 col-sm-12">          <div id="footer-heading" class="link">            </i>support<i class="fa fa-chevron-down"></i>          </div>          <ul class="submenu">            <li><a href="#">submenu 3</a>            </li>            <li><a href="#">submenu 3</a>            </li>            <li><a href="#">submenu 3</a>            </li>            <li><a href="#">submenu 3</a>            </li>          </ul>        </li>        <li class="col-md-3 col-sm-12">          <div id="footer-heading" class="link">contact us<i class="fa fa-chevron-down"></i>          </div>          <ul class="submenu">            <li><a href="#">submenu 4</a>            </li>            <li><a href="#">submenu 4</a>            </li>            <li><a href="#">submenu 4</a>            </li>            <li><a href="#">submenu 4</a>            </li>          </ul>        </li>      </div>      <!--end row-->    </div>    <!--end container-fluid-->  </ul>

here example on codepen


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