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Svelte Basics

Unlike traditional frameworks, Svelte is a "compiler"-based framework that converts your code into highly efficient, vanilla JavaScript at build time.

1. How Svelte is Different​

  • No Virtual DOM: It updates the actual DOM directly without the overhead of a runtime Virtual DOM, making it incredibly fast.
  • Less Code: With almost no boilerplate code, developer productivity is very high.
  • True Reactivity: The view updates automatically just by assigning a value to a variable, without any special API calls.

2. Basic Example​

<script>
  let count = 0;

  function handleClick() {
    count += 1;
  }
</script>

<button on:click={handleClick}>
  Clicked {count} {count === 1 ? 'time' : 'times'}
</button>

<style>
  button { color: #ff3e00; }
</style>

3. Declarative Binding​

<input bind:value={name}>
<p>Hello {name}!</p>

4. SvelteKit​

The official full-stack framework for building Svelte applications, emerging as a major player in next-generation web development.

If you want to build concise and high-performance applications, Svelte is a must-learn technology.

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