Sometimes, we want to insert a character after every n characters in JavaScript.
In this article, we’ll look at how to insert a character after every n characters in JavaScript.
How to insert a character after every n characters in JavaScript?
To insert a character after every n characters in JavaScript, we can use the string’s match and array join methods.
For instance, we write
const str = "123456789";
const parts = str.match(/.{1,3}/g);
const newValue = parts.join("-");
to call str.match with a regex that matches all groups of 3 digits and return the matches in an array.
Then we call join with '-' to join the matches text with '-'.
Conclusion
To insert a character after every n characters in JavaScript, we can use the string’s match and array join methods.
