close checkbox hamburger menu, when clicked outside without javascript/jquery possibly - html

Question

i have hamburger menu which i took from here. https://codepen.io/erikterwan/pen/EVzeRP
it is using only css by using a checkbox to expand and collapse the menu.
so what i want is when i click outside the menu (anywhere on the page), the menu should collapse. can someone help me.
this is the html code
<nav role="navigation">
<div id="menuToggle">
<input type="checkbox" />
<span></span>
<span></span>
<span></span>
<ul id="menu">
<li>Home</li>
<li>About</li>
<li>Info</li>
<li>Contact</li>
<li>Show me more</li>
</ul>
</div>
</nav>
this is the css code
body
{
margin: 0;
padding: 0;
background: #232323;
color: #cdcdcd;
font-family: "Avenir Next", "Avenir", sans-serif;
}
#menuToggle
{
display: block;
position: relative;
top: 50px;
left: 50px;
z-index: 1;
-webkit-user-select: none;
user-select: none;
}
#menuToggle a
{
text-decoration: none;
color: #232323;
transition: color 0.3s ease;
}
#menuToggle a:hover
{
color: tomato;
}
#menuToggle input
{
display: block;
width: 40px;
height: 32px;
position: absolute;
top: -7px;
left: -5px;
cursor: pointer;
opacity: 0;
z-index: 2;
-webkit-touch-callout: none;
}
#menuToggle span
{
display: block;
width: 33px;
height: 4px;
margin-bottom: 5px;
position: relative;
background: #cdcdcd;
border-radius: 3px;
z-index: 1;
transform-origin: 4px 0px;
transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0),
background 0.5s cubic-bezier(0.77,0.2,0.05,1.0),
opacity 0.55s ease;
}
#menuToggle span:first-child
{
transform-origin: 0% 0%;
}
#menuToggle span:nth-last-child(2)
{
transform-origin: 0% 100%;
}
#menuToggle input:checked ~ span
{
opacity: 1;
transform: rotate(45deg) translate(-2px, -1px);
background: #232323;
}
#menuToggle input:checked ~ span:nth-last-child(3)
{
opacity: 0;
transform: rotate(0deg) scale(0.2, 0.2);
}
#menuToggle input:checked ~ span:nth-last-child(2)
{
transform: rotate(-45deg) translate(0, -1px);
}
#menu
{
position: absolute;
width: 300px;
margin: -100px 0 0 -50px;
padding: 50px;
padding-top: 125px;
background: #ededed;
list-style-type: none;
-webkit-font-smoothing: antialiased;
transform-origin: 0% 0%;
transform: translate(-100%, 0);
transition: transform 0.5s cubic-bezier(0.77,0.2,0.05,1.0);
}
#menu li
{
padding: 10px 0;
font-size: 22px;
}
#menuToggle input:checked ~ ul
{
transform: none;
}

Answer 1

You could use a label that expands to the whole width and height, and positioned under the nav: <label for="checkbox-id"></label>. You would need to add an id to your checkbox. Make sure to set the label background to transparent.
EDIT: You would show the label only when #checkbox-id is checked. This can be achieved using only CSS. You might need to restructure your HTML a little bit. TBH, your implementation can be much simpler than in the codepen you're drawing inspiration from. Please let me know in a comment if you want more details.

Answer 2

What have i done is i detected a click outside an element and setting the checkbox to false.
$(document).ready(function() {
$(document).on("click", function(event) {
if ($(event.target).closest("#checkbox").length === 0) {
$("#checkbox").prop("checked", false);
}
});
});