Question

Im trying to check an input files extension with JavaScript, using:

if(extension != 'jpeg, JPEG, JPG, jpg'){}

I want the statement to read logically :’if variable extension doesn’t equal jpeg, or JPEG, or..’ and so on

but this doesn’t work, how do I code this properly?

Answer 1

If you don’t want to use regex you can do something like:

extension = extension.toLowerCase();
if(extension != 'jpeg' && extension != 'jpg')

This will also filter file extensions like JpEg.