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String replace() Method with Example in JavaScript
JavaScript String replace() Method: Here, we are going to learn about the replace() method of string in JavaScript with Example.
Submitted by IncludeHelp, on February 05, 2019
String replace() Method
replace() Method is a string method, it is used to replace a given part of the string in another given string and returns new string.
Syntax
new_string = str.replace(find, replace);
Parameters
- str is the main string in which we have to perform the replacements.
- find is the substring to be replaced in the string.
- replace is the substring to be replaced.
- new_string is the retuned string after the replacement find with replace.
Sample Input/Output
Input:
str = "Hello world!"
find = "Hello"
replace = "Hi"
Output:
"Hi world!"
Example
<html>
<head>
<title>JavaScipt Example</title>
</head>
<body>
<script>
var main_str = "Hello world!";
var find = "Hello";
var replace = "Hi";
//calling the function
var new_str = main_str.replace(find, replace);
document.write("string before replacement: " + main_str + "<br>");
document.write("string after replacement: " + new_str + "<br>");
</script>
</body>
</html>
Output
string before replacement: Hello world!
string after replacement: Hi world!
JavaScript String Object Methods »
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