filter dom content with vanilla javascript js

filter-items-vanilla.html

<input type="text" onkeyup="filter(this)"/>
<div class="row">blah</div>
<div class="row">blah blah</div>
<div class="row">blah blah blah</div>

<script>
function filter(e){
  search = e.value.toLowerCase();
  document.querySelectorAll('.row').forEach(function(row){
    text = row.innerText.toLowerCase();

    if(text.match(search)){
      row.style.display="block"
    } else {
      row.style.display="none"
    }
  })
}
</script>