title: Clicking the screen to close an off canvas menu
body: <p>I am using a off canvas menu similar to the one on W3 Schools by having two functions called to toggle the menu on/off using onclick. I am wanting to add in a function to be able to close the menu by clicking anywhere on the screen. I am new to Javascript and do not know how to be able to implement this. Any help would be great! Thanks!</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>function openNav() {
    document.getElementById("mySidenav").style.width = "250px";
    document.getElementById("main").style.marginLeft = "250px";
    document.body.style.backgroundColor = "rgba(0,0,0,0.4)";
  }
  
  function closeNav() {
    document.getElementById("mySidenav").style.width = "0";
    document.getElementById("main").style.marginLeft= "0";
    document.body.style.backgroundColor = "white";
  }</code></pre>
  <pre class="snippet-code-css lang-css prettyprint-override"><code>body {
    font-family: "Lato", sans-serif;
    transition: background-color .5s;
  }
  
  .sidenav {
    height: 100%;
    width: 0;
    position: fixed;
    z-index: 1;
    top: 0;
    left: 0;
    background-color: #111;
    overflow-x: hidden;
    transition: 0.5s;
    padding-top: 60px;
  }
  
  .sidenav a {
    padding: 8px 8px 8px 32px;
    text-decoration: none;
    font-size: 25px;
    color: #818181;
    display: block;
    transition: 0.3s;
  }
  
  .sidenav a:hover {
    color: #f1f1f1;
  }
  
  .sidenav .closebtn {
    position: absolute;
    top: 0;
    right: 25px;
    font-size: 36px;
    margin-left: 50px;
  }
  
  #main {
    transition: margin-left .5s;
    padding: 16px;
  }
  
  @media screen and (max-height: 450px) {
    .sidenav {padding-top: 15px;}
    .sidenav a {font-size: 18px;}
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;body&gt;
  
  &lt;div id="mySidenav" class="sidenav"&gt;
    &lt;a href="javascript:void(0)" class="closebtn" onclick="closeNav()"&gt;&amp;times;&lt;/a&gt;
    &lt;a href="#"&gt;About&lt;/a&gt;
    &lt;a href="#"&gt;Services&lt;/a&gt;
    &lt;a href="#"&gt;Clients&lt;/a&gt;
    &lt;a href="#"&gt;Contact&lt;/a&gt;
  &lt;/div&gt;
  
  &lt;div id="main"&gt;
    &lt;h2&gt;Sidenav Push Example&lt;/h2&gt;
    &lt;p&gt;Click on the element below to open the side navigation menu, and push this content to the right. Notice that we add a black see-through background-color to body when the sidenav is opened.&lt;/p&gt;
    &lt;span style="font-size:30px;cursor:pointer" onclick="openNav()"&gt;&amp;#9776; open&lt;/span&gt;
  &lt;/div&gt;
  &lt;/body&gt;</code></pre>
  </div>
  </div>
  </p>