remove unwanted commas in JavaScript

Question

I want to remove all unnecessary commas from the start/end of the string.

eg; google, yahoo,, , should become google, yahoo.

If pos

Answer 1

In your example you also want to trim the commas if there's spaces between them at the start or at the end, use something like this:

str.replace(/^[,\s]+|[,\s]+$/g, '').replace(/,[,\s]*,/g, ',');

Note the use of the 'g' modifier for global replace.