Part 1 / Stores / Store bindings
If a store is writable — i.e. it has a set method — you can bind to its value, just as you can bind to local component state.
In this example we're exporting a writable store name and a derived store greeting from stores.js. Update the <input> element in App.svelte:
App.svelte
<input bind:value={$name}>Changing the input value will now update name and all its dependents.
We can also assign directly to store values inside a component. Add a <button> element after the <input>:
App.svelte
<button on:click={() => $name += '!'}>
Add exclamation mark!
</button>The $name += '!' assignment is equivalent to name.set($name + '!').
1
2
3
4
5
6
7
8
9
10
<script>
import { name, greeting } from './stores.js';</script>
<h1>{$greeting}</h1><input value={$name} /><button>
Add exclamation mark!
</button>
initialising