HTML and CSS Reference
In-Depth Information
Figure 17.7
The
search()
method found the pattern starting at character position
2, where 0 is the beginning character.
The
replace()
method is used to search for a string and replace the string with another
string. The
i
modifier is used to turn off case sensitivity and the
g
modifier makes the
replacement global; that is, all occurrences of the found pattern are replaced with the
new string. The
replace()
method is also used with the grouping metacharacters. (See
the section “Grouping or Clustering” on page 761.)
FORMAT
string = oldstring.replace(regular_expression, replacement_value);
EXAMPLE
var str1 =
"I am feeling blue".replace(/blue/, "upbeat");
( str1 is assigned: "I am feeling upbeat.")
EXAMPLE
17.7
<html>
<head>
<title>The replace() Method</title>
</head>
<body bgcolor="yellow">
<script type = "text/javascript">
1
var myString="Tommy has a stomach ache."
2
var regex = /tom/i;
//
Turn off case sensitivity
3
var newString=myString.replace(regex, "Mom");
document.write(newString +"<br />");
</script>
</body>
</html>
EXPLANATION
1
The variable called
myString
is assigned the string
“Tommy has a stomach ache.”
Note that the pattern
Tom
or
tom
is found in the string twice.
2
The variable called
regex
is assigned the regular expression
/tom/i.
The
i
modifier
turns off the case sensitivity. Any combination of uppercase and lowercase letters
in the pattern
tom
will be searched for within the string.
