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top level variables are reactive even when updated inside a function, just give it a try:

https://svelte.dev/repl/44e3aece18294ddb834bcdfb4394af48?ver...

` <script>

  let name = 'world';

  const flip = () => name = name === name.toUpperCase() ? name.toLowerCase() : name.toUpperCase()

  $: console.log({ name })
</script>

<h1>Hello {name}!</h1>

<button on:click={flip}>flip!</button> `



the inconsistency comes from the fact that this reactivity, triggered from inside a function, is not taken into account to build the dependency graph and ultimately decide in which order to process the statements




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