How to nest OR statements in JavaScript?

Question

Currently I am creating a filemanager.

What I want is to check if the user has selected a video file. The file can be mov, f4v, flv<

Answer 1

You would need to explicitly compare the variable against each of those values.

if( ext === 'mov' || ext === 'f4v' || ... ) { 
}

..but, RegExp to the rescue, we can go like

if( /mov|f4v|flv|mp4|swf/.test( ext ) ) { 
}