In MS Edge, placeholder text doesn't disappear after entering text in input type=“number”

Answer 1

You could always manually filter out letters by watching the keypress event. Here's some JQuery code that will only allow you to type "0123456789" into a number textbox:

$("input[type='number']").keypress(function(event){
    // If this key is not a number...
    if (event.which < 48 || event.which > 57)
  {
    event.preventDefault();
    return false;
  }
});

Here's your JSFiddle forked to include this code: https://jsfiddle.net/o263wmnh/