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docs: clarify that $state works deeply #10002

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docs: clarify that `$state` works deeply
benmccann Dec 26, 2023
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benmccann Dec 26, 2023
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24 changes: 17 additions & 7 deletions sites/svelte-5-preview/src/routes/docs/content/01-api/02-runes.md
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Original file line number Diff line number Diff line change
Expand Up @@ -40,23 +40,33 @@ class Todo {

> In this example, the compiler transforms `done` and `text` into `get`/`set` methods on the class prototype referencing private fields

Objects and arrays [are made reactive](/#H4sIAAAAAAAAE42QwWrDMBBEf2URhUhUNEl7c21DviPOwZY3jVpZEtIqUBz9e-UUt9BTj7M784bdmZ21wciq48xsPyGr2MF7Jhl9-kXEKxrCoqNLQS2TOqqgPbWd7cgggU3TgCFCAw-RekJ-3Et4lvByEq-drbe_dlsPichZcFYZrT6amQto2pXw5FO88FUYtG90gUfYi3zvWrYL75vxL57zfA07_zfr23k1vjtt-aZ0bQTcbrDL5ZifZcAxKeS8lzDc8X0xDhJ2ItdbX1jlOZMb9VnjyCoKCfMpfwG975NFVwEAAA==):
Objects and arrays [are made deeply reactive](/#H4sIAAAAAAAAA22P3W6DMAyFX8WKJjWoEW23OwZIe46mFwTcNQySiJhJE827TyGV9iOuLJ9jn89e2FUP6FlxXphpRmQFe3OOCUZfLjb-EwdCJpi389RGpfTtpB3V0kgakMCqHip48tQQ8iWqkgx6wq6ARyvJzKPCyRdwPgl4FvBySU6IJWSv0pSHn1xTqpnImmha0w66_agWnkFVpy2r-jwh8kdw7mZ_4xv6gOadbrCHUxakWffjaOQlxm8e_IXBFsc6noWUY93_GLcay8Zeb7XhO9jDLoP7HY4BKtiam7CbW-TpT94IUOslDexBiaQeY4nflAdXM8FG2-mrxo4VNM0YLuEb3K_i5NQBAAA=):

```svelte
<script>
let numbers = $state([1, 2, 3]);
let obj = $state({
nested: {
numbers: [1, 2, 3]
}
});
</script>

<button onclick={() => numbers.push(numbers.length + 1)}>
<button
onclick={() =>
obj.nested.numbers.push(obj.nested.numbers.length + 1)}
>
push
</button>

<button onclick={() => numbers.pop()}> pop </button>
<button onclick={() => obj.nested.numbers.pop()}>
pop
</button>

<p>
{numbers.join(' + ') || 0}
=
{numbers.reduce((a, b) => a + b, 0)}
{obj.nested.numbers.join(' + ') || 0} = {obj.nested.numbers.reduce(
(a, b) => a + b,
0
)}
</p>
```

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