Example of Text Counter in Rails

var ready;
ready = function() {
  var charsCountEl, countTextBox, totalChars;
  totalChars = 100;
  countTextBox = $('#body-field');
  charsCountEl = $('#countchars');
  charsCountEl.text(totalChars);
  countTextBox.keyup(function() {
    var CharsToDel, thisChars;
    thisChars = this.value.replace(/{.*}/g, '').length;
    if (thisChars > totalChars) {
      CharsToDel = thisChars - totalChars;
      this.value = this.value.substring(0, this.value.length - CharsToDel);
    } else {
      charsCountEl.text(totalChars - thisChars);
    }
  });
};

$(document).ready(ready);
$(document).on('page:load', ready);