HTML and CSS Reference
In-Depth Information
EXAMPLE
var myString="She wants attention now!";
var regex = /ten/
//
Literal way
var regex=new RegExp("ten");
//
Constructor way
regex.test
(myString);
//
Looking for "ten" in
myString
or
/ten/.test
("She wants attention now!");
EXAMPLE
17.1
<html>
<head><title>Regular Expression Objects the Literal Way</title>
<script language = "JavaScript">
1
var myString="My gloves are worn for wear.";
2
var regex = /love/;
//
Create a regular expression object
3
if (
regex.test(myString)
){
4
alert("Found pattern!");
}
else{
5
alert("No match.");
}
</script>
</head>
<body></body>
</html>
EXPLANATION
1
“My gloves are worn for wear.”
is assigned to a variable called
myString
.
2
The regular expression /
love
/ is assigned to the variable called
regex
. This is the
literal way of creating a regular expression object.
3
The
test()
method for the regular expression object tests to see if
myString
contains
the pattern,
love
. If
love
is found within
gloves
, the
test()
method will return
true
.
4
The alert dialog box will display
Found pattern!
if the
test()
method returned
true
.
5
If the pattern /
love/
is not found in
myString
, the
test()
method returns
false
, and
the alert dialog box will display its message,
No match
.
EXAMPLE
17.2
<html>
<head>
<title>Regular Expression Objects with the Constructor</title>
<script language = "JavaScript">
1
var myString="My gloves are worn for wear.";
