CodePen Embed - ePWQqZ

<input type="text">
<div data-block="admin">
  Admin block
</div>
<div data-block="user">
  User block
</div>

div {
  display: none;
}

var $blocks = document.querySelectorAll('[data-block]');

document.querySelector('input').addEventListener('input', function() {
  var $block = document.querySelector('div[data-block="'+ this.value +'"]');
  $block === null ? [].forEach.call($blocks, function(node) {
    node.style.display = 'none';
  }) : $block.style.display = 'block';
});

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