JSFiddle - React, Tailwind, and code Playground

HTML

<div class="form-group has-feedback cpm-field empty">
  <label class="control-label" for="CPM">CPM</label>
  <input type="text" class="form-control" id="CPM" min="0.45" placeholder="CPM Price (USD)">
</div>

JavaScript

$('.cpm-field input').change(function(){
  var min = $(this).attr('min');
  value = $(this).val();
  if (value.length > 0 && value < min)
  {
    $(this).val(min);
  }
});