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In the DOM, everything is a string. That's unhelpful when you're dealing with numeric inputs — type="number" and type="range" — as it means you have to remember to coerce input.value before using it.

With bind:value, Svelte takes care of it for you:

<input type=number bind:value={a} min=0 max=10>
<input type=range bind:value={a} min=0 max=10>