Yes, we can replace part of a string without creating a new string using the replace() method as in the below syntax −
var anyVariableName=yourValue; yourVariableName=yourVariableName.replace(yourOldValue,yourNewValue);
Example
var message="Hello,this is John"; console.log("Before replacing the message="+message); message=message.replace("John","David Miller"); console.log("After replacing the message="+message);
To run the above program, you need to use the following command −
node fileName.js.
Here, my file name is demo57.js.
Output
This will produce the following output −
PS C:\Users\Amit\JavaScript-code> node demo57.js Before replacing the message=Hello,this is John After replacing the message=Hello,this is David Miller