在网页的移动视图中隐藏div元素

Question

I am building a MEAN stack application. Currently, I am trying to hide certain div elements in mobile view using css media rules. And in mobile view listing it using a button dropdown which sets collapsed to true/false on click using ng-click. Its working as expected. But in mobile view, if the dropdown is activated and I expand browser to larger size, the menu comes in the web view which is not expected. Can anyone help on the same?

Below is part of the code:

 <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#sidbar" aria-expanded="false" aria-controls="sidbar" ng-init="sidCollapsed=true" ng-click="sidCollapsed=!sidCollapsed"> <span class="sr-only">Toggle navigation</span> <span class="icon-bar"></span> <span class="icon-bar"></span> <span class="icon-bar"></span> </button> <div id="sidbar" collapse="sidCollapsed" class="sidbar"> <!--<ul class="nav navbar-nav navbar-left">--> <ul class="nav navbar-nav"> <li><a ng-class="{'active':$location.path() == '/home'}" href="#/home">Home</a></li> <li><a ng-class="{'active':$location.path() == '/profile'}" ng-show="user" href="#/profile">Profile</a></li> <li><a ng-class="{'active':$location.path() == '/admin'}" ng-show="user && user.roles.indexOf('admin')>=0" href="#/admin">Admin</a></li> <li><a ng-class="{'active':$location.path() == '/forms'}" ng-show="user" href="#/forms">Forms</a></li> </ul> </div> css: @media (min-width: 768px){ .sidbar { display:none; }} 

Answer 1

By the looks of things, you're using Bootstrap so you can use the hidden-xs class

<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#sidbar" aria-expanded="false" aria-controls="sidbar" ng-init="sidCollapsed=true" ng-click="sidCollapsed=!sidCollapsed">
  <span class="sr-only">Toggle navigation</span>
  <span class="icon-bar"></span>
  <span class="icon-bar"></span>
  <span class="icon-bar"></span>
</button>



<div id="sidbar" collapse="sidCollapsed" class="sidbar hidden-xs">
  <!--<ul class="nav navbar-nav navbar-left">-->
  <ul class="nav navbar-nav">
    <li><a ng-class="{'active':$location.path() == '/home'}" href="#/home">Home</a>
    </li>
    <li><a ng-class="{'active':$location.path() == '/profile'}" ng-show="user" href="#/profile">Profile</a>
    </li>
    <li><a ng-class="{'active':$location.path() == '/admin'}" ng-show="user && user.roles.indexOf('admin')>=0" href="#/admin">Admin</a>
    </li>
    <li><a ng-class="{'active':$location.path() == '/forms'}" ng-show="user" href="#/forms">Forms</a>
    </li>
  </ul>
</div>

You can find out more usable classes for showing and hiding elements dependent on browser size in the Bootstrap documentation.

• Responsive Utility Classes