How to not run function if its a mobile device?

Question

I have a modal pop up function on my website, but i don't want this to run if the browser is smaller than 480px. I have found that if I put an if statement such as:

if (window.innerWidth && window.innerWidth > 480) {

 run function()
}

Then it should run only if the browsers innerWidth is > 480. However its not working and I think its because I have page scaling on this website. Can any one help me with a conditional statement if page scaling is on? Thanks.

Answer 1

I have figured it out.

if (window.outerWidth && window.outerWidth > 480) {

}