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HTML

CSS

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HTML

              
                
<header>
	<h2>Отфильтруйте так. чтобы остались только красные блоки:</h2>
	<button id="filter">Оставить красные блоки</button>
</header>

<div class="row">
	<div class="grid-sizer"></div>
	<div class="gutter-sizer"></div>
	
	<div class="item red"></div>
	<div class="item green"></div>
	<div class="item green"></div>
	<div class="item blue"></div>
	<div class="item red"></div>
	<div class="item red"></div>
	<div class="item green"></div>
	<div class="item red"></div>
	<div class="item blue"></div>
	<div class="item blue"></div>
	<div class="item red"></div>
	<div class="item green"></div>
</div>
              
            
!

CSS

              
                @import 'nib'

reset()
	display block
	margin 0
	padding 0
	box-sizing border-box

.hide
	display none !important

header
	text-align center
	padding-bottom 25px

.green
	background teal
.red
	background tomato
.blue
	background skyblue

.row
	reset()
	clearfix()
	width 650px
	margin auto
.item
	reset()
	float left
	height 100px
	width 200px
	margin-bottom 10px
.grid-sizer
	width 200px
.gutter-sizer
	width 25px
              
            
!

JS

              
                let row = $('.row'),
	item = $('.item'),
	red = $('.red');

row.masonry({
	itemSelector: '.item',
	columnWidth: '.grid-sizer',
	gutter: '.gutter-sizer',
});

$('#filter').on('click', ()=> {
	item.addClass('hide');
	red.removeClass('hide');
	
	row.masonry();
});
              
            
!
999px

Console