Building a Staggered Menu from Scratch

A staggered menu can add a lot of flair to your portfolio or application. In this post, we’ll build one from scratch, exploring the complete lifecycle of a high-performance, GSAP-free animation system.

The goal is not just to make something that moves. The goal is to make a menu that feels intentional under real usage: repeated taps, interrupted transitions, viewport changes, and mid-animation state changes.

The Foundation

Before we write any animation code, we need a solid HTML and CSS foundation. The key to a good staggered menu is ensuring that it sits above all other content and that the structural elements are ready to be manipulated by an animation library.

The HTML Structure

Our structure requires a few crucial layers:

1. The global overlay container (fixed to the viewport).
2. The background layer (often colored or blurred).
3. The actual navigation links container.

<nav class="fixed inset-0 z-50 pointer-events-none">
  <div class="background-layer absolute inset-0 bg-black"></div>
  <ul class="nav-links relative z-10 flex flex-col items-center justify-center h-full"> ... </ul>
</nav>

The CSS Setup

First, we need to make sure our overlay covers the entire screen, and we must handle the pointer-events. When the menu is closed, we want users to interact with the site normally (pointer-events: none). When it opens, we enable them (pointer-events: auto).

.menu-shell {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
}

.menu-shell[data-open="true"] {
  pointer-events: auto;
}

Two details matter here:

• The shell owns interactivity
• The child layers can animate independently without affecting layout

Structuring Layers for Animation

For a staggered menu, I usually split the visual hierarchy into three concerns:

1. Background or surface reveal
2. Primary navigation labels
3. Supplemental metadata like socials or helper text

That separation lets each layer move at a different pace. It is also much easier to debug than one large animation timeline against a deeply nested component tree.

Animation State Management

Managing state is where many custom animations fall apart. If a user double-clicks the menu icon or closes the menu before it finishes opening, your state machine must handle the interruption gracefully.

Svelte State and Reactivity

In Svelte, managing this state is incredibly straightforward.

<script>
  let isOpen = false;
  let isAnimating = false;

  function toggleMenu() {
    isOpen = !isOpen;
  }
</script>

That example is intentionally small. In production, I like to distinguish at least between closed, opening, open, and closing. Anything less tends to get brittle as soon as interactions overlap.

Handling Interruptions

Animation interruption is why we migrated away from some older CSS transition paradigms layout to a dedicated spring physics engine like motion.dev. Native springs naturally redirect their velocity vectors rather than hard-snapping to a new destination.

If the user changes their mind halfway through the animation, the interface should adapt gracefully instead of punishing them with a visual snap.

In practice, that means treating every transition as reversible.

Implementing Motion.dev

Now we get to the fun part. We will use motion.dev to handle our animation orchestrations.

The Background Wipe

Instead of a simple fade-in, let’s create a slanted wipe effect. We’ll animate the clip-path CSS property.

import { animate } from "motion";

// Open animation
animate(
  ".background-layer", 
  { clipPath: "polygon(0 0, 100% 0, 100% 100%, 0% 100%)" },
  { duration: 0.6, easing: "easeOut" }
);

I like using clip-path sparingly. It creates a more authored reveal than opacity alone, but it is still worth testing carefully on lower-powered mobile devices.

Staggering the Links

The core feature of this menu is the staggered entrance of the navigation links. motion.dev provides a built-in stagger utility for exactly this purpose.

import { animate, stagger } from "motion";

animate(
  ".nav-link",
  { y: [50, 0], opacity: [0, 1] },
  { 
    delay: stagger(0.1, { startDelay: 0.2 }),
    duration: 0.5 
  }
);

Once you get this working, resist the temptation to keep layering more delay. Stagger is most effective when it creates just enough rhythm to guide the eye without turning navigation into a performance.

Keeping the Timeline Readable

Complex menu motion usually becomes hard to maintain when all transitions are authored inline. A small sequence builder makes it much easier to reason about:

const sequence = [
  [".background-layer", { opacity: [0, 1] }, { duration: 0.3 }],
  [
    ".nav-link",
    { y: [32, 0], opacity: [0, 1] },
    { delay: stagger(0.08), duration: 0.45 },
  ],
];

This does not just improve code style. It makes design decisions auditable. You can see which layer starts first and whether the pacing still makes sense.

Performance Optimization

Even the best animations can ruin an experience if they drop frames.

GPU Acceleration

Ensure that the properties you are animating (like transform and opacity) are processed on the GPU. Avoid animating properties that trigger layout thrashing, such as width, height, or margin.

Mobile Considerations

On mobile devices, a full-screen blurred background can be exceptionally computationally expensive. Consider disabling CSS filters like backdrop-filter: blur() on smaller screens or ensuring you use will-change: transform.

I also avoid making the first interaction too slow on mobile. Menus should feel immediate. A desktop can tolerate a dramatic 600ms entrance. A phone menu usually feels better around 250ms to 400ms, especially when the user is moving quickly.

Debugging the Feel

When a staggered menu feels off, the bug is often not technical. It is editorial.

Ask:

• Does the menu open too theatrically for a utilitarian action?
• Are secondary links competing with the primary navigation?
• Does the close state feel as polished as the open state?
• Does the first focused element become obvious quickly enough?

I often slow the whole sequence down in development just to inspect the composition. Once the order feels right, I tighten the durations again.

Final Checklist

Before calling a staggered menu finished, I want to be able to say yes to all of these:

1. The menu can be opened and closed repeatedly without visual corruption
2. Active layers do not block page interaction while closed
3. Text remains legible during animated states
4. Motion remains smooth on a phone
5. Reduced-motion users still get a coherent interaction

Conclusion

Building a custom staggered menu requires balancing structural readiness, state management, and performant animation libraries. By ditching heavy dependencies for physics-based libraries like motion.dev, we create interactions that feel significantly more natural and responsive to user input.