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“Unlike React or Vue which diff in-memory tree representations at runtime, Svelte acts as a compiler. It analyzes templates at build time and emits compact, direct imperative JavaScript that mutates the exact DOM nodes when state changes.”
How Svelte skips the Virtual DOM by compiling components into pinpoint surgical DOM updates.
<script>
let count = $state(0);
</script>
<button onclick={() => count++}>
Clicks: {count}
</button>Modify the state variable below to watch the signal update the output without VDOM diffing:
Because there is no Virtual DOM tree traversal, CPU overhead on low-power mobile devices drops dramatically and memory allocations are negligible.