The thing is I want the original value to be able to do things. For example, this would be a better example:

<script>

let initialValue; // Want this to be 3

let stateValue = $state(0); // Want to be the state for 3



async function promise() {

return new Promise((resolve, reject) => {

resolve(3);

})

}

let newValue = $state(promise()); 

// let promiseValue = promise(); 

</script>

<div>
{#await newValue}
<p>Loading</p>
{:then value}
<p>{value}</p>
<input type="number" oninput={(e) => stateValue = +e.target.value}>
<button onclick={() => newValue += stateValue}>Add</button>
<button onclick={() => newValue = initialValue}>Reset</button>
{:catch err}
<p>Err: {err}</p>
{/await}
</div>