History object

History objects are predefined objects
which contains the complete information
about the links and URL’s visited during
the session.
www.ustudy.in

• length:
• The length property of the history object returns
the number of elements in the history list.
• General syntax of length property of history
Object:
– history.length
www.ustudy.in

<html>
<body>
<script type="text/javascript">
var ex = history.length;
document.write("The number of pages visited
before this page is" +ex+ " pages!!!.")
</script>
</body>
</html>
www.ustudy.in

• The output of the above program is
• The number of pages visited before this page is
5 pages!!!
• This means that there are 5 entries in the
history list and denotes the number of pages
visited before visiting the current page.
www.ustudy.in

• This property contains the complete URL of
the current History entry.
• General syntax of current property of history
Object:
• history.current
www.ustudy.in

• The next property of history object contains the
complete URL of the next element in the History
list. This functionality or the URL visited is the
same as pressing the forward button or menu.
• General syntax of next property of history Object:
• history.next
www.ustudy.in

• The previous property of history object contains
the complete URL of the previous element in the
History list. This functionality or the URL visited is
the same as pressing the back button or menu.
• General syntax of previous property of history
Object:
• history.previous
www.ustudy.in

• back():
• There may be scenarios where the programmer wishes to load the
previous URL present in the history list. In this case, the
programmer can make use of the back() method of the history
object. The back() method of the history object takes the user to
the previous page. The functionality results in the same as pressing
the back button of the browser.
• General syntax of back method of history Object:
• history.back()
www.ustudy.in

www.ustudy.in
<html>
<head>
function funback()
{
window.history.back()
}
</script>
</head>
<body>
<input type="button" value="Press the Button to go
to Previous Page!!!" onclick="funback()" />
</body>
</html>

• The output of the above program is a button
with message as
• Press the Button to go to Previous Page!!!
• When this button is pressed, the control is
navigated to the previous page.
www.ustudy.in

• The forward() method of the history object loads
the next URL in the History list. The functionality
results are the same as pressing the forward
button of the browser.
• General syntax of forward method of history
Object:
• history.forward()
www.ustudy.in

www.ustudy.in
<html>
<head>
function funfor()
{
window.history.forward()
}
</script>
</head>
<body>
to Next Page!!!" onclick="funfor()" />
</body>
</html>

• The output of the above program is a button
with message as
• Press the Button to go to Next Page!!!
• When this button is pressed, the control is
navigated to next page (to the next URL) in the
history list.
www.ustudy.in

• If the programmer wishes to load a specified URL from the
History list, then the go method of history object can be
used.
• General syntax of go method of history Object:
• history.go(number) or history.go(URL)
• The back method seen above is the same as history.go(-1) in
terms of go method of history object. The forward method
seen above is the same as history.go(1)
www.ustudy.in

www.ustudy.in
<html>
<head>
function funfor()
{
window.history.go(1)
}
</script>
</head>
<body>
to Next Page!!!" onclick="funfor()" />
</body>
</html>
The output of the above program loads the next page in the history list.

• http://www.w3schools.com/jsref/obj_history.as
p
• http://www.exforsys.com/tutorials/javascript/ja
vascript-history-object-properties-and-
methods.html
www.ustudy.in

History object

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History object