嗨小主，先前练习中我们接触到的<script>中的代码都是在组件初始化时执行的。但偶尔我们也需要在解析到代码模块时就运行，并且只运行一次，这个时候我们可以使用<script module>。
举个例子🌰: 先前的音乐播放器，我们想播放一个的时候其它几个都暂定，就可以使用<script module>：

In all the examples we’ve seen so far, the <script> block contains code that runs when each component instance is initialised. For the vast majority of components, that’s all you’ll ever need. Very occasionally, you’ll need to run some code outside of an individual component instance. For example: returning to our custom audio player from a previous exercise, you can play all four tracks simultaneously. It would be better if playing one stopped all the others. We can do that by declaring a <script module> block. Code contained inside it will run once, when the module first evaluates, rather than when a component is instantiated. Place this at the top of AudioPlayer.svelte (note that this is a separate script tag):

<script module>
	let current;
</script>

这样就可以让不同组件间交互还不需要使用状态管理:

It’s now possible for the components to ‘talk’ to each other without any state management:

<audio
	src={src}
	bind:currentTime={time}
	bind:duration
	bind:paused
	onplay={(e) => {
		const audio = e.currentTarget;

		if (audio !== current) {
			current?.pause();
			current = audio;
		}
	}}
	onended={() => {
		time = 0;
	}}
/>