jQuery drop down menu closing by clicking outside

I am developing a simple dropdown menu with jQuery . When a user press on a trigger area, it will toggle the dropdown area. My question is how to have a click event outside of the dropdown menu so that it close the dropdown menu ?

You can tell any click that bubbles all the way up the DOM to hide the dropdown, and any click that makes it to the parent of the dropdown to stop bubbling.

/* Anything that gets to the document
   will hide the dropdown */
$(document).click(function(){
  $("#dropdown").hide();
});

/* Clicks within the dropdown won't make
   it past the dropdown itself */
$("#dropdown").click(function(e){
  e.stopPropagation();
});

Demo: http://jsbin.com/umubad/2/edit

how to have a click event outside of the dropdown menu so that it close the dropdown menu ? Heres the code

$(document).click(function (e) {
    e.stopPropagation();
    var container = $(".dropDown");

    //check if the clicked area is dropDown or not
    if (container.has(e.target).length === 0) {
        $('.subMenu').hide();
    }
})

Stopping Event Propagation in some particular elements ma y become dangerous as it may prevent other some scripts from running. So check whether the triggering is from the excluded area from inside the function.

$(document).on('click', function(event) {
  if (!$(event.target).closest('#menucontainer').length) {
    // Hide the menus.
  }
});

Here function is initiated when clicking on document, but it excludes triggering from #menucontainer. For details https://css-tricks.com/dangers-stopping-event-propagation/

You would need to attach your click event to some element. If there are lots of other elements on the page you would not want to attach a click event to all of them.

One potential way would be to create a transparent div below your dropdown menu but above all other elements on the page. You would show it when the drop down was shown. Have the element have a click hander that hides the drop down and the transparent div.

$('#clickCatcher').click(function () { 
  $('#dropContainer').hide();
  $(this).hide();
});

#dropContainer { z-index: 101; ... }
#clickCatcher { position: absolute; top: 0; left: 0; width: 100%; height: 100%; z-index: 100; }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="dropDown"></div>
<div id="clickCatcher"></div>

Another multiple dropdown example that works https://jsfiddle.net/vgjddv6u/

$('.moderate .button').on('click', (event) => {
  $(event.target).siblings('.dropdown')
    .toggleClass('is-open');
});

$(document).click(function(e) {
  $('.moderate')
    .not($('.moderate').has($(e.target)))
    .children('.dropdown')
    .removeClass('is-open');
});

<link href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.4.0/css/bulma.css" rel="stylesheet" />

<script
  src="https://code.jquery.com/jquery-3.2.1.min.js"
  integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
  crossorigin="anonymous"></script>

<style>
.dropdown {
  box-shadow: 0 0 2px #777;
  display: none;
  left: 0;
  position: absolute;
  padding: 2px;
  z-index: 10;
}

.dropdown a {
  font-size: 12px;
  padding: 4px;
}

.dropdown.is-open {
  display: block;
}
</style>


<div class="control moderate">
  <button class="button is-small" type="button">
        moderate
      </button>

  <div class="box dropdown">
    <ul>
      <li><a class="nav-item">edit</a></li>
      <li><a class="nav-item">delete</a></li>
      <li><a class="nav-item">block user</a>   </li>
    </ul>
  </div>
</div>


<div class="control moderate">
  <button class="button is-small" type="button">
        moderate
      </button>

  <div class="box dropdown">
    <ul>
      <li><a class="nav-item">edit</a></li>
      <li><a class="nav-item">delete</a></li>
      <li><a class="nav-item">block user</a></li>
    </ul>
  </div>
</div>

Selected answer works for one drop down menu only. For multiple solution would be:

$('body').click(function(event){
   $dropdowns.not($dropdowns.has(event.target)).hide();
});

There is a tricky way to do this. You can manipulate blur event by adding tabIndex.

$('.click').click(function (e) {
    $(this).siblings('.dropdown').fadeToggle(100);
});

$('.container').blur(function (e) { 
    $('.dropdown').fadeOut(100);
});

.container{
  position: relative;
  display: inline-block;
}

.click{
  cursor: pointer;
  user-select: none;
  z-index: 1;
}

.dropdown{
  position: absolute;
  left: 0;
  top: 100%;
  display: none;
  background: #eee;
  padding: 1rem;
  z-index: 2;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<section class="container" tabIndex="1">
  <section class="click">click this</section>
  <section class="dropdown">
    dropdown menu here
  </section>
</section>

<br /> <br />

<section class="container" tabIndex="2">
  <section class="click">click this</section>
  <section class="dropdown">
    dropdown menu here
  </section>
</section>