Javascript DOM HTML Input DatetimeLocal compare defaultValue with value

Introduction

An example that shows the difference between the defaultValue and value property:

Change the date and time of the datetime field, and then click the button below.

View in separate window 

<!DOCTYPE html>
<html>
<body>
<input type="datetime-local" id="myLocalDate" value="2014-11-16T15:25:33">
<button type="button" onclick="myFunction()">Test</button>
<p id="demo"></p>

<script>
function myFunction() {/*from   www. j  av a 2s  . c  o  m*/
  var x = document.getElementById("myLocalDate");
  var defaultVal = x.defaultValue;
  var currentVal = x.value;

  if (defaultVal == currentVal) {
    document.getElementById("demo").innerHTML = "Default value and current value is the same: "
    + x.defaultValue + " and " + x.value
    + "<br>Change the value of the datetime field to see the difference!";
  } else {
    document.getElementById("demo").innerHTML = "The default value was: " + defaultVal
    + "<br>The new value is: " + currentVal;
  }
}
</script>

</body>
</html>



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