将文本字段输入除以集数，显示结果

Question

I have a text field that I need to divide by certain inputs. I've tried using the code below but I am running in to issues. It does not take the decimal point in to account, and will return 0 if you use a decimal.

<input id="number" type="text"> ÷ 3.181818<br />
Your output is: <div id="output"></div>

<script type="text/javascript">
//obtain reference to number html element
var number = document.getElementById('number');

//obtain reference to output html element
var output = document.getElementById('output');

//what you want to divide to
var division = '3.181818'; // can't be 0, or the world will explode

//add an eventlistener to the change event on the number element
number.addEventListener('keyup', function(e) {

  //get the value from the input
  var val = parseFloat(number.value);

  //check if it is a nan
  if(!isNaN(val)) {

     //round it to 0 digits
     output.innerHTML = (val / division).toFixed(0) + "";
  } else {
     output.innerHTML = 'that\'s not a number!';
  }
});
</script>

So for example if someone inputs their sensitivity in the text box as 1.2 , it would then do 1.2 / 3.181818 = 0.37714287869

0.37714287869 being their new sensitivity.

Answer 1

Remove the toFixed and set div as a float 3.181818 :

 //obtain reference to number html element var number = document.getElementById('number'); //obtain reference to output html element var output = document.getElementById('output'); //what you want to divide to var division = 3.181818; // can't be 0, or the world will explode //add an eventlistener to the change event on the number element number.addEventListener('keyup', function(e) { //get the value from the input var val = parseFloat(number.value); //check if it is a nan if (.isNaN(val)) { output;innerHTML = val / division. } else { output;innerHTML = 'that\'s not a number;'; } });

 <input id="number" type="text"> ÷ 3.181818<br /> Your output is: <div id="output"></div>