在输入焦点的特定 div 上添加另一个类

Question

I'm trying to find a solution for my searchbar problem. The searchbar should behave differently on smartphones so I need to add another class to the div, where the searchbar is placed.

When I click on the input field, the div with the class "highlighted" should get another class. Until now I just found solution to add a class to a next or partent div, but that's not what I was searching for.

 <div class="highlighted"> <div class="region region-highlighted"> <section id="block-x" class="contextual-region block clearfix"> <div data-contextual-id="block:block=x:langcode=en|block_content:block_content=20:changed=1462269631&amp;ds_bundle=basic&amp;ds_view_mode=default&amp;langcode=en"></div> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"> <p>x</p> </div> </section> <div class="search-block-form contextual-region block block-search" data-drupal-selector="search-block-form" id="block-bootstrap-search" role="search"> <div data-contextual-id="block:block=bootstrap_search:langcode=en"></div> <form action="/search/node" method="get" id="search-block-form" accept-charset="UTF-8"> <div class="form-item js-form-item form-type-search js-form-type-search form-item-keys js-form-item-keys form-no-label form-group"> <label for="edit-keys--2" class="control-label sr-only">Search</label> <div class="input-group"> <input title="Enter the terms you wish to search for." data-drupal-selector="edit-keys" class="form-search form-control" placeholder="Search" type="search" id="edit-keys--2" name="keys" value="" size="15" maxlength="128"><span class="input-group-btn"><button type="submit" value="Search" class="button js-form-submit form-submit btn-primary btn icon-only" name=""><span class="sr-only">Search</span><span class="icon glyphicon glyphicon-search" aria-hidden="true"></span> </button> </span> </div> <div id="edit-keys--2--description" class="description help-block">Enter the terms you wish to search for.</div> </div> <div class="form-actions form-group js-form-wrapper form-wrapper" data-drupal-selector="edit-actions" id="edit-actions"></div> </form> </div> </div> </div>

Answer 1

Not sure what you're trying, but something like $('.highlighted').addClass('otherclass'); should work.

Edit after comment:

$('.input-group input').focus(function () { $('.highlighted').addClass('open'); })
$('.input-group input').blur(function () {$('.highlighted').removeClass('open'); });

(The only change needed to your code was the last selector. I'm just putting it in 2 lines for clarity.)