npm i git+https://github.com/vertiscape/stellar.git

This will replaces lenis dependency source, so you don't have to make any further changes to the codebase to use this fork.

"dependencies": {
    "lenis": "github:vertiscape/stellar", // Replaces official version.
}

• If the scrollTo target equals the current scroll offset, changed would be false, otherwise changed would be true.
• Reason: changed allows developers to handle asynchronous tasks differently when scrollTo does nothing and executes onComplete.

lenis.scrollTo(target, {
    duration: 2,
    onComplete(lenis, changed) {
        if (changed) {
            console.log("It did scroll, so I'm executed after 2 seconds.");
        } else {
            console.log("The target is the same as the scroll offset, so I'm executed immediately.");
        }
    }
});

• Using cubicBezier function from framer-motion, ease takes 4 elements in an array and use that to create bezier curve function.
• ease will overrides easing if provided.
• Just like easing, ease is useless if lerp defined, and duration is required to make both works.
• Reason: easing function is nice to have, but usually, bezier curve is enough.

Programmatically scroll with ease:

lenis.scrollTo(target, {
    duration: 2,
    ease: [0, 1, 1, 0],
});

Set default scroll behavior with ease:

// Enable bezier curve easing.
lenis.options.lerp = undefined;
lenis.options.duration = 1;
lenis.options.ease = [0, 1, 1, 0];

// Reset to default.
lenis.options.lerp = 0.1;
lenis.options.ease = undefined;