Sometimes, we want to use a regex to add a space after each comma in JavaScript.

In this article, we’ll look at how to use a regex to add a space after each comma in JavaScript.

How to use a regex to add a space after each comma in JavaScript?

To use a regex to add a space after each comma in JavaScript, we can use the string replace method.

For instance, we write:

const input = '1,2,3,4,5'
const output = input.replace(/(d+,)/g, '$1 ');
console.log(output)

to call input.replace with a regex that matches all instances of digits with a comma after it.

Then we replace matches with a extra space with '$1 '.

Therefore, output is '1, 2, 3, 4, 5'.

Conclusion

To use a regex to add a space after each comma in JavaScript, we can use the string replace method.