This should be easy. I have this path variable declared in a gulpfile.js:

paths = {

    img: [

    'src/patternlab/**/**/*.jpg',

    'src/patternlab/**/**/*.png'

  ]

};

I'd like to use a simple OR switch for the file extension, along the lines of:

'src/patternlab/**/**/*.(jpg|png)'

But I can't find the right syntax! Have tried numerous permutations, looked through MDN etc…