prueba fontsize

otra prueba

by femfoyou

HTML

font size: <input id="font-input" type="range" min="0" max="250" value="65"/>

JavaScript

var fontInput = document.getElementById("font-input");

var charSize = 65;
var cellSize = charSize/7;

fontInput.oninput = function(){
  charSize = parseInt(fontInput.value);
  cellSize = charSize/7;
}