how to use Service Worker in Shopify theme.liquid

Technical Q&A
1

I’m try to use Service Worker in Shopify to make my store faster. The code like this :

(function (){
  navigator.serviceWorker.register("https://cdn.shopify.com/xxx/sw.js")
      .then((reg) => {
        console.log("reg",reg);
      }).catch((err)=>{
          console.log("err",err)
      });
})()

and i got the error.

err DOMException: Failed to register a ServiceWorker: The origin of the provided scriptURL ('https://cdn.shopify.com') does not match the current origin ('https://www.xxx.com').

How should I write it ？ thank you for every answer。 ：）