The Date object is a data type built into the JavaScript language. Date objects are created with the new Date( ) as shown below.
Once a Date object is created, a number of methods allow you to operate on it. Most methods simply allow you to get and set the year, month, day, hour, minute, second, and millisecond fields of the object, using either local time or UTC (universal, or GMT) time.
The getHours() function of the Date object accepts the date in string format and returns the hour of the current day.
Syntax
Its syntax is as follows
dateObj.getHours();
Example
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<script type="text/javascript">
var dateObj = new Date('september 26, 89 12:4:00');
document.write("Hour of the day: "+dateObj.getHours());
</script>
</body>
</html>Output
Hour of the day: 12
Example
Incase if you haven’t mentioned the hour of the day (/time) while creating the date object this function returns 0.
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<script type="text/javascript">
var dateObj = new Date('september 26, 89');
document.write("Hour of the day: "+dateObj.getHours());
</script>
</body>
</html>Output
Hour of the day: 0
Example
In the same way if you haven’t passed anything while creating the date object (to the constructor) this function returns the Current hour of the day.
<html>
<head>
<title>JavaScript Example</title>
</head>
<body>
<script type="text/javascript">
var dateObj = new Date();
document.write("Hour of the day: "+dateObj.getHours());
</script>
</body>
</html>Output
Hour of the day: 12