Svelte Transitions

Animations and transitions help frontend applications feel smoother and more interactive. Instead of elements appearing instantly, transitions allow content to enter and leave the page in a more natural way.

Svelte includes built-in transition features that make animations simple to implement.

What Are Transitions?

Transitions control how elements appear and disappear from the interface.

For example, transitions can animate:

• Modals;
• Notifications;
• Menus;
• Cards;
• Dropdowns;
• Dynamic lists.

Modern frontend applications often use subtle animations to improve the overall user experience.

Importing a Transition

Svelte provides several built-in transitions such as fade, fly, and slide.

Open App.svelte and add the following code:

<script>
  import { fade } from 'svelte/transition';

  let visible = true;
</script>

The fade transition is imported from the Svelte transition module.

Using the fade Transition

Apply the transition to an element:

<button on:click={() => visible = !visible}>
  Toggle Message
</button>

{#if visible}
  <h2 transition:fade>
    Welcome to Svelte
  </h2>
{/if}

When the message appears or disappears, Svelte automatically applies the fade animation.

Why Transitions Matter

Transitions help applications feel more polished and responsive.

They are commonly used for:

• Navigation menus;
• Modal windows;
• Notifications;
• Dynamic UI updates;
• Interactive dashboards.

Small animations can significantly improve the overall frontend experience.

Built-In Transition Types

Svelte includes several built-in transitions:

• fade;
• fly;
• slide;
• scale;
• blur.

Each transition creates different animation effects and can be customized later.