使汉堡菜单消失菜单点击

如果屏幕宽度小于860像素，则显示JS汉堡菜单。从这个宽度开始，原来的菜单变成了一个堆叠的布局，当点击汉堡菜单图标时，它会滑出。在点击汉堡菜单图标时，切换工作很好，但我希望它在用户点击菜单中的链接时自动消失。有办法做到吗?

相关的HTML:

<header class="scroll-effect">
        <!-- Navigation bar -->
        <div class="navigation">
            <div class="container">
                <div class="row>">
                    <div class="six.columns">
                        <a href="index.html">
                            <img src="images/logo-nav.png" alt="BackupChecks Logo">
                        </a>
                    </div>
                    <div class="six.columns">
                    <nav>
                        <a href="#customer-portal" class="scroll-button">Customer Portal</a>
                        <a href="#service-desk" class="scroll-button">Service Desk</a>
                        <a href="#pricing" class="scroll-button">Pricing</a>
                        <a href="#contact" class="scroll-button">Contact</a>
                    </nav>
                    </div>
                </div>
            </div>
        </div>

        <!-- End of navigation bar -->

        <div class="header-contents">
        <h1>
            <img src="images/logo.png" alt="BackupChecks logo" class="animated bounceInDown">
        </h1>
        <h2 class="animated bounceInDown">
            The backup service desk for Asigra
        </h2>
        <div class="button-box animated fadeInUp">
            <a href="#learn-more" class="scroll-button button-green">
            Learn more
            </a>
            <a href="#pricing" class="scroll-button button-white-outline">
            Buy it now
            </a>
        </div>
        </div>
    </header>
    <!-- JS burger menu -->
        <img src="images/trigger.png" alt="Menu icon" class="trigger">
    <!-- </a> -->

.navigation {
    background: rgba(255,255,255,1);
    height: 70px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: +20;
    border-bottom: solid 1px #D9D9D9;
}
header.container {
    margin: 0 auto;
    max-width: 1000px;
}
.navigation img {
    vertical-align: middle;
    float: left;
    line-height: 70px;
    text-align: left;
}
nav {
    float: right;
    line-height: 70px;
}
nav a {
    color: #3E4750;
    font-size: 13px;
    text-transform: uppercase;
    font-weight: 700;
    text-decoration: none;
    padding: 0 0 0 40px;
    display: inline-block;
    text-decoration: none;
    transition: color ease .4s;
}
nav a:hover {
    color: #66CC99;
}
@media screen and (max-width: 860px) {
nav {
    margin-top: 70px;
    background: #ffffff; 
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
nav a {
        display: block;
        text-align: center;
        padding: 0 30px 0 30px;
        border-bottom: solid 1px #D9D9D9;
    }
nav {
     display: none;
}
img.trigger {
    display: block;
    position: fixed;
    top: 0px;
    right: 0px;
    }
}

这是我的javascript:

$("img.trigger").on("click", function(){
    $("nav").slideToggle("slow");
});