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>
|
The output of the code above will be:
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>
|
The output of the code above will be:
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>
|
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.
|
Try it yourself »
|
JavaScript String Object
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