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JavaScript replace() Method
JavaScript String Object
Definition and Usage
The replace() method searches for a match between a substring (or regular expression) and a string, and replaces the matched substring with a new substring
Syntax
string.replace(regexp/substr,newstring)
| Parameter | Description |
|---|---|
| regexp/substr | Required. A substring or a regular expression. Read more about the RegExp object |
| newstring | Required. The string to replace the found value in parameter 1 |
Browser Support
The replace() method is supported in all major browsers.
Examples
Example 1
Perform a case-sensitive search:
<script type="text/javascript">
var str="Visit Microsoft!";
document.write(str.replace("Microsoft", "W3Schools"));
</script>
var str="Visit Microsoft!";
document.write(str.replace("Microsoft", "W3Schools"));
</script>
The output of the code above will be:
Visit W3Schools!
Try it yourself »
Example 2
Perform a case-insensitive search:
<script type="text/javascript">
var str="Visit Microsoft!";
document.write(str.replace(/microsoft/i, "W3Schools"));
</script>
var str="Visit Microsoft!";
document.write(str.replace(/microsoft/i, "W3Schools"));
</script>
The output of the code above will be:
Visit W3Schools!
Try it yourself »
Example 3
Perform a global, case-insensitive search (the word Microsoft will be replaced each time it is found):
<script type="text/javascript">
var str="Welcome to Microsoft! ";
str=str + "We are proud to announce that Microsoft has ";
str=str + "one of the largest Web Developers sites in the world.";
document.write(str.replace(/microsoft/gi, "W3Schools"));
</script>
var str="Welcome to Microsoft! ";
str=str + "We are proud to announce that Microsoft has ";
str=str + "one of the largest Web Developers sites in the world.";
document.write(str.replace(/microsoft/gi, "W3Schools"));
</script>
The output of the code above will be:
Welcome to W3Schools! We are proud to announce that W3Schools
has one of the largest Web Developers sites in the world.
has one of the largest Web Developers sites in the world.
Try it yourself »
JavaScript String Object
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Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.