Replace commas, full stops, hyphens, and spaces with underscore

Question

I am trying to replace commas, full stops, hyphens, and spaces with underscores. I have tried the below but get the error Range out of order in character class

'Helo,._cool '.replace(/[,.- ]/g, "_")

Answer 1

You need to escape the - character, because it's used to specify a range of characters like 0-9 or a-z.

console.log('Helo,._cool '.replace(/[,.\- ]/g, "_"));