Javascript DOM StorageEvent newValue Property

Introduction

Get the new value of the storage item that changed.

The storage event is only triggered when a window other than itself makes the changes.

The newValue property belongs to the Storage Event object.

View in separate window 

<!DOCTYPE html>
<html>
<body>
<button onclick="changeValue()">Change a Storage Item</button>
<p id="demo"></p>
<script>
window.addEventListener("storage", myFunction);

function myFunction(event) {/*from   w w  w.  jav  a  2 s.com*/
  var txt = "Key: " + event.key + "<br>";
  txt += "Value: " + event.newValue;
  document.getElementById("demo").innerHTML = txt;
}

function changeValue() {
  var x = window.open("", "myWindow", "width=200,height=100");
  x.localStorage.setItem("mytime", Date.now());
  x.close();
}
</script>
</body>
</html>

The newValue property returns the new value of the changed storage item.




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