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node_modules/motion-dom/dist/es/animation/NativeAnimationExtended.mjs

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+import { secondsToMilliseconds } from 'motion-utils';
+import { JSAnimation } from './JSAnimation.mjs';
+import { NativeAnimation } from './NativeAnimation.mjs';
+import { replaceTransitionType } from './utils/replace-transition-type.mjs';
+import { replaceStringEasing } from './waapi/utils/unsupported-easing.mjs';
+
+/**
+ * 10ms is chosen here as it strikes a balance between smooth
+ * results (more than one keyframe per frame at 60fps) and
+ * keyframe quantity.
+ */
+const sampleDelta = 10; //ms
+class NativeAnimationExtended extends NativeAnimation {
+    constructor(options) {
+        /**
+         * The base NativeAnimation function only supports a subset
+         * of Motion easings, and WAAPI also only supports some
+         * easing functions via string/cubic-bezier definitions.
+         *
+         * This function replaces those unsupported easing functions
+         * with a JS easing function. This will later get compiled
+         * to a linear() easing function.
+         */
+        replaceStringEasing(options);
+        /**
+         * Ensure we replace the transition type with a generator function
+         * before passing to WAAPI.
+         *
+         * TODO: Does this have a better home? It could be shared with
+         * JSAnimation.
+         */
+        replaceTransitionType(options);
+        super(options);
+        if (options.startTime) {
+            this.startTime = options.startTime;
+        }
+        this.options = options;
+    }
+    /**
+     * WAAPI doesn't natively have any interruption capabilities.
+     *
+     * Rather than read commited styles back out of the DOM, we can
+     * create a renderless JS animation and sample it twice to calculate
+     * its current value, "previous" value, and therefore allow
+     * Motion to calculate velocity for any subsequent animation.
+     */
+    updateMotionValue(value) {
+        const { motionValue, onUpdate, onComplete, element, ...options } = this.options;
+        if (!motionValue)
+            return;
+        if (value !== undefined) {
+            motionValue.set(value);
+            return;
+        }
+        const sampleAnimation = new JSAnimation({
+            ...options,
+            autoplay: false,
+        });
+        const sampleTime = secondsToMilliseconds(this.finishedTime ?? this.time);
+        motionValue.setWithVelocity(sampleAnimation.sample(sampleTime - sampleDelta).value, sampleAnimation.sample(sampleTime).value, sampleDelta);
+        sampleAnimation.stop();
+    }
+}
+
+export { NativeAnimationExtended };