Use typeof operator on null in JavaScript
Description
The following code shows how to use typeof operator on null.
Example
<!-- w ww. ja v a 2s .c o m-->
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
var aString = null;
document.writeln(typeof aString);
document.writeln(typeof null);
</script>
</head>
<body>
</body>
</html>
The code above generates the following result.
Javascript Tutorial Null
Assign undefined value to a variable in Jav...
Assign variable to NULL value in JavaScript
Check Whether a Variable or Property Is nul...
Check if a value is undefined in JavaScript
Check if a variable has been assigned a val...
Create a null value with null in JavaScript
Create undefined value by defining a variab...
Differentiate between null and undefined, y...
Find out the difference between undefined v...
Treat undefined the same as null, you can u...
Assign undefined value to a variable in Jav...
Assign variable to NULL value in JavaScript
Check Whether a Variable or Property Is nul...
Check if a value is undefined in JavaScript
Check if a variable has been assigned a val...
Create a null value with null in JavaScript
Create undefined value by defining a variab...
Differentiate between null and undefined, y...
Find out the difference between undefined v...
Treat undefined the same as null, you can u...