Using .split() to transform string to array (Improvement needed)

Question

I'm trying to use JavaScript to transform this string

.txt|.pdf|.xls|.xlsx|.doc|.docx|.rtf|.jpg|.jpeg|.png|.gif

into this array

["txt", "pdf", "xls", "xlsx", "doc", "docx", "rtf", "jpg", "jpeg", "png", "gif"]

But it gives me this

[".txt", "pdf", "xls", "xlsx", "doc", "docx", "rtf", "jpg", "jpeg", "png", "gif"]

It keeps the dot in front of first element. What can I do since I don't know regex? Here is my code:

let fileTypes = string.split('|.');

Answer 1

The problem only seems to be the first dot, so you could just do

s = ".txt|.pdf|.xls|.xlsx|.doc|.docx|.rtf|.jpg|.jpeg|.png|.gif"
s.substr(1).split("|.")

Answer 2

Something like this:

var string = '.txt|.pdf|.xls|.xlsx|.doc|.docx|.rtf|.jpg|.jpeg|.png|.gif';

var arr = string.replace(/\./g,'').split('|');

This will first strip all of the dots, then split on the |. Separating by the pipe is all that matters... So it will take a more flexible string if that matters.