Passing a promise to addEventListener() in TypeScript?

On a sveltekit app, I am trying to create an event listener that executes an async function (a mutation) using Typescript.

onMount(() => {  document.addEventListener('keyup', handleKeyPress);});

The argument I pass to the addEventListener is an async function defined as...

async function handleKeyPress(event: KeyboardEvent) {  if (mainList.length > 0) {    const press =      event.key === 'ArrowLeft' ? 'left' : event.key === 'ArrowRight' ? 'right' : null;      if (press) {        await moveItem(press);      }  }}

You see, addEventListener expects a function that returns void, so I am getting this error:

Promise returned in function argument where a void return was expected. eslint

Anyway to solve this error?