Re: [dom] Make addEventListener throw for service worker optimization (#155)

> @@ -1065,6 +1065,15 @@ seen from the definition above, an <a>event listener</a> is a more broad concept
>  method, when invoked, must run these steps:
>  
>  <ol>
> + <li>
> +  <p>If the global object is a {{ServiceWorkerGlobalScope}} object and its associated

Addressed.

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