{#each callbackURLs as _, i}
{#if callbackURLs.length > 1 || allowEmpty}
(callbackURLs = callbackURLs.filter((_, index) => index !== i))} >
{/if}
{/each}
{#if error}
{error}
{/if}
(callbackURLs = [...callbackURLs, ''])} >
{callbackURLs.length === 0 ? m.add() : m.add_another()}