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https://reactjs.org/docs/add-react-to-a-website.html
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{#await fetch(url).then(res=>res.json())}-->
<p>loading posts...</p>
{:then value}
{#each value as post}
<Post {...post} on:post-delete={callbackPostDelete}/>
{/each}
{:catch error}
<p>Something went wrong: {error.message}</p>
{/await}
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{#await fetch(url).then(res=>res.json())}-->
<p>loading posts...</p>
{:then value}
{#each value as post}
<Post {...post} on:post-delete={callbackPostDelete}/>
{/each}
{:catch error}
<p>Something went wrong: {error.message}</p>
{/await}
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