Multiselect dropdown with check boxes are used to show the filters.
Copy <div class="input-group search-box search-filter-multiselect">
<div class="input-group-prepend"> <i class="far fa-search"></i> </div>
<input type="search" class="form-control" placeholder="Search by keyword" aria-label="" aria-describedby="">
<select class="form-control searchFilters" id="searchFilters" multiple>
<option>Item 1</option>
<option>Item 2</option>
<option>Item 3</option>
<option>Item 4</option>
<option>Item 5</option>
<option>Item 6</option>
</select>
<div class="input-group-append"> <button class="btn btn-primary" type="button">Search</button> </div>
</div>
Checkboxes are shown as filters below the search field.
Copy <div class="search-box search-filter-checkbox bg-khaki">
<div class="input-group ">
<div class="input-group-prepend"> <i class="far fa-search"></i> </div>
<input type="search" class="form-control" placeholder="Search by keyword" aria-label="" aria-describedby="">
</div>
<div class="form-group mt-2">
<span class="mt-2 mr-2 d-md-inline-block d-sm-block"> <strong> Search in</strong></span>
<div class="form-check form-check-inline d-sm-inline-block"> <label class="form-check-label"> <input class="form-check-input" type="checkbox"> Category 1 <span class="checkbox-overlay "></span> </label> </div>
<div class="form-check form-check-inline d-sm-inline-block"> <label class="form-check-label"> <input class="form-check-input" type="checkbox"> Category 2 <span class="checkbox-overlay "></span> </label> </div>
<div class="form-check form-check-inline d-sm-inline-block"> <label class="form-check-label"> <input class="form-check-input" type="checkbox"> Category 3 <span class="checkbox-overlay "></span> </label> </div>
<div class="form-check form-check-inline d-sm-inline-block"> <label class="form-check-label"> <input class="form-check-input" type="checkbox"> Category 4 <span class="checkbox-overlay "></span> </label> </div>
</div>
<div class="text-center"> <button class="btn btn-primary" type="button">Search</button> </div>
</div>