till download files, everything works

node_modules/framer-motion/dist/es/animation/generators/spring/find.mjs

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+import { warning } from '../../../utils/errors.mjs';
+import { clamp } from '../../../utils/clamp.mjs';
+import { secondsToMilliseconds, millisecondsToSeconds } from '../../../utils/time-conversion.mjs';
+
+const safeMin = 0.001;
+const minDuration = 0.01;
+const maxDuration = 10.0;
+const minDamping = 0.05;
+const maxDamping = 1;
+function findSpring({ duration = 800, bounce = 0.25, velocity = 0, mass = 1, }) {
+    let envelope;
+    let derivative;
+    warning(duration <= secondsToMilliseconds(maxDuration), "Spring duration must be 10 seconds or less");
+    let dampingRatio = 1 - bounce;
+    /**
+     * Restrict dampingRatio and duration to within acceptable ranges.
+     */
+    dampingRatio = clamp(minDamping, maxDamping, dampingRatio);
+    duration = clamp(minDuration, maxDuration, millisecondsToSeconds(duration));
+    if (dampingRatio < 1) {
+        /**
+         * Underdamped spring
+         */
+        envelope = (undampedFreq) => {
+            const exponentialDecay = undampedFreq * dampingRatio;
+            const delta = exponentialDecay * duration;
+            const a = exponentialDecay - velocity;
+            const b = calcAngularFreq(undampedFreq, dampingRatio);
+            const c = Math.exp(-delta);
+            return safeMin - (a / b) * c;
+        };
+        derivative = (undampedFreq) => {
+            const exponentialDecay = undampedFreq * dampingRatio;
+            const delta = exponentialDecay * duration;
+            const d = delta * velocity + velocity;
+            const e = Math.pow(dampingRatio, 2) * Math.pow(undampedFreq, 2) * duration;
+            const f = Math.exp(-delta);
+            const g = calcAngularFreq(Math.pow(undampedFreq, 2), dampingRatio);
+            const factor = -envelope(undampedFreq) + safeMin > 0 ? -1 : 1;
+            return (factor * ((d - e) * f)) / g;
+        };
+    }
+    else {
+        /**
+         * Critically-damped spring
+         */
+        envelope = (undampedFreq) => {
+            const a = Math.exp(-undampedFreq * duration);
+            const b = (undampedFreq - velocity) * duration + 1;
+            return -safeMin + a * b;
+        };
+        derivative = (undampedFreq) => {
+            const a = Math.exp(-undampedFreq * duration);
+            const b = (velocity - undampedFreq) * (duration * duration);
+            return a * b;
+        };
+    }
+    const initialGuess = 5 / duration;
+    const undampedFreq = approximateRoot(envelope, derivative, initialGuess);
+    duration = secondsToMilliseconds(duration);
+    if (isNaN(undampedFreq)) {
+        return {
+            stiffness: 100,
+            damping: 10,
+            duration,
+        };
+    }
+    else {
+        const stiffness = Math.pow(undampedFreq, 2) * mass;
+        return {
+            stiffness,
+            damping: dampingRatio * 2 * Math.sqrt(mass * stiffness),
+            duration,
+        };
+    }
+}
+const rootIterations = 12;
+function approximateRoot(envelope, derivative, initialGuess) {
+    let result = initialGuess;
+    for (let i = 1; i < rootIterations; i++) {
+        result = result - envelope(result) / derivative(result);
+    }
+    return result;
+}
+function calcAngularFreq(undampedFreq, dampingRatio) {
+    return undampedFreq * Math.sqrt(1 - dampingRatio * dampingRatio);
+}
+
+export { calcAngularFreq, findSpring, maxDamping, maxDuration, minDamping, minDuration };

node_modules/framer-motion/dist/es/animation/generators/spring/index.mjs

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+import { millisecondsToSeconds, secondsToMilliseconds } from '../../../utils/time-conversion.mjs';
+import { calcGeneratorVelocity } from '../utils/velocity.mjs';
+import { findSpring, calcAngularFreq } from './find.mjs';
+
+const durationKeys = ["duration", "bounce"];
+const physicsKeys = ["stiffness", "damping", "mass"];
+function isSpringType(options, keys) {
+    return keys.some((key) => options[key] !== undefined);
+}
+function getSpringOptions(options) {
+    let springOptions = {
+        velocity: 0.0,
+        stiffness: 100,
+        damping: 10,
+        mass: 1.0,
+        isResolvedFromDuration: false,
+        ...options,
+    };
+    // stiffness/damping/mass overrides duration/bounce
+    if (!isSpringType(options, physicsKeys) &&
+        isSpringType(options, durationKeys)) {
+        const derived = findSpring(options);
+        springOptions = {
+            ...springOptions,
+            ...derived,
+            mass: 1.0,
+        };
+        springOptions.isResolvedFromDuration = true;
+    }
+    return springOptions;
+}
+function spring({ keyframes, restDelta, restSpeed, ...options }) {
+    const origin = keyframes[0];
+    const target = keyframes[keyframes.length - 1];
+    /**
+     * This is the Iterator-spec return value. We ensure it's mutable rather than using a generator
+     * to reduce GC during animation.
+     */
+    const state = { done: false, value: origin };
+    const { stiffness, damping, mass, duration, velocity, isResolvedFromDuration, } = getSpringOptions({
+        ...options,
+        velocity: -millisecondsToSeconds(options.velocity || 0),
+    });
+    const initialVelocity = velocity || 0.0;
+    const dampingRatio = damping / (2 * Math.sqrt(stiffness * mass));
+    const initialDelta = target - origin;
+    const undampedAngularFreq = millisecondsToSeconds(Math.sqrt(stiffness / mass));
+    /**
+     * If we're working on a granular scale, use smaller defaults for determining
+     * when the spring is finished.
+     *
+     * These defaults have been selected emprically based on what strikes a good
+     * ratio between feeling good and finishing as soon as changes are imperceptible.
+     */
+    const isGranularScale = Math.abs(initialDelta) < 5;
+    restSpeed || (restSpeed = isGranularScale ? 0.01 : 2);
+    restDelta || (restDelta = isGranularScale ? 0.005 : 0.5);
+    let resolveSpring;
+    if (dampingRatio < 1) {
+        const angularFreq = calcAngularFreq(undampedAngularFreq, dampingRatio);
+        // Underdamped spring
+        resolveSpring = (t) => {
+            const envelope = Math.exp(-dampingRatio * undampedAngularFreq * t);
+            return (target -
+                envelope *
+                    (((initialVelocity +
+                        dampingRatio * undampedAngularFreq * initialDelta) /
+                        angularFreq) *
+                        Math.sin(angularFreq * t) +
+                        initialDelta * Math.cos(angularFreq * t)));
+        };
+    }
+    else if (dampingRatio === 1) {
+        // Critically damped spring
+        resolveSpring = (t) => target -
+            Math.exp(-undampedAngularFreq * t) *
+                (initialDelta +
+                    (initialVelocity + undampedAngularFreq * initialDelta) * t);
+    }
+    else {
+        // Overdamped spring
+        const dampedAngularFreq = undampedAngularFreq * Math.sqrt(dampingRatio * dampingRatio - 1);
+        resolveSpring = (t) => {
+            const envelope = Math.exp(-dampingRatio * undampedAngularFreq * t);
+            // When performing sinh or cosh values can hit Infinity so we cap them here
+            const freqForT = Math.min(dampedAngularFreq * t, 300);
+            return (target -
+                (envelope *
+                    ((initialVelocity +
+                        dampingRatio * undampedAngularFreq * initialDelta) *
+                        Math.sinh(freqForT) +
+                        dampedAngularFreq *
+                            initialDelta *
+                            Math.cosh(freqForT))) /
+                    dampedAngularFreq);
+        };
+    }
+    return {
+        calculatedDuration: isResolvedFromDuration ? duration || null : null,
+        next: (t) => {
+            const current = resolveSpring(t);
+            if (!isResolvedFromDuration) {
+                let currentVelocity = 0.0;
+                /**
+                 * We only need to calculate velocity for under-damped springs
+                 * as over- and critically-damped springs can't overshoot, so
+                 * checking only for displacement is enough.
+                 */
+                if (dampingRatio < 1) {
+                    currentVelocity =
+                        t === 0
+                            ? secondsToMilliseconds(initialVelocity)
+                            : calcGeneratorVelocity(resolveSpring, t, current);
+                }
+                const isBelowVelocityThreshold = Math.abs(currentVelocity) <= restSpeed;
+                const isBelowDisplacementThreshold = Math.abs(target - current) <= restDelta;
+                state.done =
+                    isBelowVelocityThreshold && isBelowDisplacementThreshold;
+            }
+            else {
+                state.done = t >= duration;
+            }
+            state.value = state.done ? target : current;
+            return state;
+        },
+    };
+}
+
+export { spring };