跟JavaScript一样，if也可以有else:

Just like in JavaScript, an if block can have an else block:

{#if count > 10}
	<p>{count} is greater than 10</p>
{:else}
	<p>{count} is between 0 and 10</p>
{/if}

聪明如小主应该不难发现这里的规则：{#...}用于开始一个代码块, {/...}用于结束代码块, {:...}用于继续添加代码块。 恭喜小主💕至此你已掌握了大部分的大道法则。

{#...} opens a block. {/...} closes a block. {:...} continues a block. Congratulations — you’ve already learned almost all the syntax Svelte adds to HTML.