In many programming operations, replacing every instance of a character in a string is a common task. In JavaScript, there are various ways for replacing all characters from a string, such as loops, or pre-defined JavaScript methods. The easiest and fastest way for replacing all occurrences of a character in a string is to use the “replaceAll()” method.

This post will explain the fastest method for replacing all the instances of a character in a string in JavaScript.

Fastest/Efficient Method to Replace All Instances of a Character in a String

To replace all instances in a string there are two methods “replace()” and the “replaceAll()” method. The fastest method between these two is the “replaceAll()” method. It is the JavaScript predefined method that replaces all the instances of a character of the given string.

Syntax
The given syntax is utilized for the replaceAll() method:

Here, “replacer” is the character or the word that will replace in a string, and the “replacement” is the character or word that is used as a replacement of a replacer.

Example
Create a string-type variable that stores a string:

Call the replaceAll() method and pass the “apple” as a replacer and the “strawberry” as a replacement:

Print the resultant string on the console:

It can be seen that all the instances of “apple” in a string have been successfully replaced with the “strawberry”:

That’s how you can utilize the replaceAll() method for replacing all instances fastly.

Conclusion

For replacing all characters in a string, there are two methods “replace()” and the “replaceAll()” method. The “replaceAll()” is the fastest/efficient method for replacing all the instances of a string character. It is faster than the “replace()” method because the replace() method uses “regular expressions” for removing all characters from a string. While using the replaceAll() method it will directly replace all the string occurrences. This post explained the fastest method for replacing all the instances of a character in a string in JavaScript.