reveal-on-scroll-react/dist/cjs/index.js

Add scroll animation to your React application super fast!

'use strict';

var jsxRuntime = require('react/jsx-runtime');
var React = require('react');

function _interopNamespaceDefault(e) {
    var n = Object.create(null);
    if (e) {
        Object.keys(e).forEach(function (k) {
            if (k !== 'default') {
                var d = Object.getOwnPropertyDescriptor(e, k);
                Object.defineProperty(n, k, d.get ? d : {
                    enumerable: true,
                    get: function () { return e[k]; }
                });
            }
        });
    }
    n.default = e;
    return Object.freeze(n);
}

var React__namespace = /*#__PURE__*/_interopNamespaceDefault(React);

const htmlElements = [
    "p",
    "h1",
    "h2",
    "h3",
    "h4",
    "h5",
    "h6",
    "strong",
    "em",
    "blockquote",
    "cite",
    "q",
    "div",
    "ul",
    "li",
    // "a",
    // "img",
];

/**
 * @public
 */
const MotionConfigContext = React.createContext({
    transformPagePoint: (p) => p,
    isStatic: false,
    reducedMotion: "never",
});

const MotionContext = React.createContext({});

/**
 * @public
 */
const PresenceContext = React.createContext(null);

const isBrowser = typeof document !== "undefined";

const useIsomorphicLayoutEffect = isBrowser ? React.useLayoutEffect : React.useEffect;

const LazyContext = React.createContext({ strict: false });

function useVisualElement(Component, visualState, props, createVisualElement) {
    const { visualElement: parent } = React.useContext(MotionContext);
    const lazyContext = React.useContext(LazyContext);
    const presenceContext = React.useContext(PresenceContext);
    const reducedMotionConfig = React.useContext(MotionConfigContext).reducedMotion;
    const visualElementRef = React.useRef();
    /**
     * If we haven't preloaded a renderer, check to see if we have one lazy-loaded
     */
    createVisualElement = createVisualElement || lazyContext.renderer;
    if (!visualElementRef.current && createVisualElement) {
        visualElementRef.current = createVisualElement(Component, {
            visualState,
            parent,
            props,
            presenceContext,
            blockInitialAnimation: presenceContext
                ? presenceContext.initial === false
                : false,
            reducedMotionConfig,
        });
    }
    const visualElement = visualElementRef.current;
    React.useInsertionEffect(() => {
        visualElement && visualElement.update(props, presenceContext);
    });
    useIsomorphicLayoutEffect(() => {
        visualElement && visualElement.render();
    });
    React.useEffect(() => {
        visualElement && visualElement.updateFeatures();
    });
    /**
     * Ideally this function would always run in a useEffect.
     *
     * However, if we have optimised appear animations to handoff from,
     * it needs to happen synchronously to ensure there's no flash of
     * incorrect styles in the event of a hydration error.
     *
     * So if we detect a situtation where optimised appear animations
     * are running, we use useLayoutEffect to trigger animations.
     */
    const useAnimateChangesEffect = window.HandoffAppearAnimations
        ? useIsomorphicLayoutEffect
        : React.useEffect;
    useAnimateChangesEffect(() => {
        if (visualElement && visualElement.animationState) {
            visualElement.animationState.animateChanges();
        }
    });
    return visualElement;
}

function isRefObject(ref) {
    return (typeof ref === "object" &&
        Object.prototype.hasOwnProperty.call(ref, "current"));
}

/**
 * Creates a ref function that, when called, hydrates the provided
 * external ref and VisualElement.
 */
function useMotionRef(visualState, visualElement, externalRef) {
    return React.useCallback((instance) => {
        instance && visualState.mount && visualState.mount(instance);
        if (visualElement) {
            instance
                ? visualElement.mount(instance)
                : visualElement.unmount();
        }
        if (externalRef) {
            if (typeof externalRef === "function") {
                externalRef(instance);
            }
            else if (isRefObject(externalRef)) {
                externalRef.current = instance;
            }
        }
    }, 
    /**
     * Only pass a new ref callback to React if we've received a visual element
     * factory. Otherwise we'll be mounting/remounting every time externalRef
     * or other dependencies change.
     */
    [visualElement]);
}

/**
 * Decides if the supplied variable is variant label
 */
function isVariantLabel(v) {
    return typeof v === "string" || Array.isArray(v);
}

function isAnimationControls(v) {
    return typeof v === "object" && typeof v.start === "function";
}

const variantPriorityOrder = [
    "animate",
    "whileInView",
    "whileFocus",
    "whileHover",
    "whileTap",
    "whileDrag",
    "exit",
];
const variantProps = ["initial", ...variantPriorityOrder];

function isControllingVariants(props) {
    return (isAnimationControls(props.animate) ||
        variantProps.some((name) => isVariantLabel(props[name])));
}
function isVariantNode(props) {
    return Boolean(isControllingVariants(props) || props.variants);
}

function getCurrentTreeVariants(props, context) {
    if (isControllingVariants(props)) {
        const { initial, animate } = props;
        return {
            initial: initial === false || isVariantLabel(initial)
                ? initial
                : undefined,
            animate: isVariantLabel(animate) ? animate : undefined,
        };
    }
    return props.inherit !== false ? context : {};
}

function useCreateMotionContext(props) {
    const { initial, animate } = getCurrentTreeVariants(props, React.useContext(MotionContext));
    return React.useMemo(() => ({ initial, animate }), [variantLabelsAsDependency(initial), variantLabelsAsDependency(animate)]);
}
function variantLabelsAsDependency(prop) {
    return Array.isArray(prop) ? prop.join(" ") : prop;
}

const featureProps = {
    animation: [
        "animate",
        "variants",
        "whileHover",
        "whileTap",
        "exit",
        "whileInView",
        "whileFocus",
        "whileDrag",
    ],
    exit: ["exit"],
    drag: ["drag", "dragControls"],
    focus: ["whileFocus"],
    hover: ["whileHover", "onHoverStart", "onHoverEnd"],
    tap: ["whileTap", "onTap", "onTapStart", "onTapCancel"],
    pan: ["onPan", "onPanStart", "onPanSessionStart", "onPanEnd"],
    inView: ["whileInView", "onViewportEnter", "onViewportLeave"],
    layout: ["layout", "layoutId"],
};
const featureDefinitions = {};
for (const key in featureProps) {
    featureDefinitions[key] = {
        isEnabled: (props) => featureProps[key].some((name) => !!props[name]),
    };
}

function loadFeatures(features) {
    for (const key in features) {
        featureDefinitions[key] = {
            ...featureDefinitions[key],
            ...features[key],
        };
    }
}

/**
 * Creates a constant value over the lifecycle of a component.
 *
 * Even if `useMemo` is provided an empty array as its final argument, it doesn't offer
 * a guarantee that it won't re-run for performance reasons later on. By using `useConstant`
 * you can ensure that initialisers don't execute twice or more.
 */
function useConstant(init) {
    const ref = React.useRef(null);
    if (ref.current === null) {
        ref.current = init();
    }
    return ref.current;
}

/**
 * This should only ever be modified on the client otherwise it'll
 * persist through server requests. If we need instanced states we
 * could lazy-init via root.
 */
const globalProjectionState = {
    /**
     * Global flag as to whether the tree has animated since the last time
     * we resized the window
     */
    hasAnimatedSinceResize: true,
    /**
     * We set this to true once, on the first update. Any nodes added to the tree beyond that
     * update will be given a `data-projection-id` attribute.
     */
    hasEverUpdated: false,
};

let id$2 = 1;
function useProjectionId() {
    return useConstant(() => {
        if (globalProjectionState.hasEverUpdated) {
            return id$2++;
        }
    });
}

const LayoutGroupContext = React.createContext({});

/**
 * Internal, exported only for usage in Framer
 */
const SwitchLayoutGroupContext = React.createContext({});

const motionComponentSymbol = Symbol.for("motionComponentSymbol");

/**
 * Create a `motion` component.
 *
 * This function accepts a Component argument, which can be either a string (ie "div"
 * for `motion.div`), or an actual React component.
 *
 * Alongside this is a config option which provides a way of rendering the provided
 * component "offline", or outside the React render cycle.
 */
function createMotionComponent({ preloadedFeatures, createVisualElement, useRender, useVisualState, Component, }) {
    preloadedFeatures && loadFeatures(preloadedFeatures);
    function MotionComponent(props, externalRef) {
        /**
         * If we need to measure the element we load this functionality in a
         * separate class component in order to gain access to getSnapshotBeforeUpdate.
         */
        let MeasureLayout;
        const configAndProps = {
            ...React.useContext(MotionConfigContext),
            ...props,
            layoutId: useLayoutId(props),
        };
        const { isStatic } = configAndProps;
        const context = useCreateMotionContext(props);
        /**
         * Create a unique projection ID for this component. If a new component is added
         * during a layout animation we'll use this to query the DOM and hydrate its ref early, allowing
         * us to measure it as soon as any layout effect flushes pending layout animations.
         *
         * Performance note: It'd be better not to have to search the DOM for these elements.
         * For newly-entering components it could be enough to only correct treeScale, in which
         * case we could mount in a scale-correction mode. This wouldn't be enough for
         * shared element transitions however. Perhaps for those we could revert to a root node
         * that gets forceRendered and layout animations are triggered on its layout effect.
         */
        const projectionId = isStatic ? undefined : useProjectionId();
        const visualState = useVisualState(props, isStatic);
        if (!isStatic && isBrowser) {
            /**
             * Create a VisualElement for this component. A VisualElement provides a common
             * interface to renderer-specific APIs (ie DOM/Three.js etc) as well as
             * providing a way of rendering to these APIs outside of the React render loop
             * for more performant animations and interactions
             */
            context.visualElement = useVisualElement(Component, visualState, configAndProps, createVisualElement);
            /**
             * Load Motion gesture and animation features. These are rendered as renderless
             * components so each feature can optionally make use of React lifecycle methods.
             */
            const initialLayoutGroupConfig = React.useContext(SwitchLayoutGroupContext);
            const isStrict = React.useContext(LazyContext).strict;
            if (context.visualElement) {
                MeasureLayout = context.visualElement.loadFeatures(
                // Note: Pass the full new combined props to correctly re-render dynamic feature components.
                configAndProps, isStrict, preloadedFeatures, projectionId, initialLayoutGroupConfig);
            }
        }
        /**
         * The mount order and hierarchy is specific to ensure our element ref
         * is hydrated by the time features fire their effects.
         */
        return (React__namespace.createElement(MotionContext.Provider, { value: context },
            MeasureLayout && context.visualElement ? (React__namespace.createElement(MeasureLayout, { visualElement: context.visualElement, ...configAndProps })) : null,
            useRender(Component, props, projectionId, useMotionRef(visualState, context.visualElement, externalRef), visualState, isStatic, context.visualElement)));
    }
    const ForwardRefComponent = React.forwardRef(MotionComponent);
    ForwardRefComponent[motionComponentSymbol] = Component;
    return ForwardRefComponent;
}
function useLayoutId({ layoutId }) {
    const layoutGroupId = React.useContext(LayoutGroupContext).id;
    return layoutGroupId && layoutId !== undefined
        ? layoutGroupId + "-" + layoutId
        : layoutId;
}

/**
 * Convert any React component into a `motion` component. The provided component
 * **must** use `React.forwardRef` to the underlying DOM component you want to animate.
 *
 * ```jsx
 * const Component = React.forwardRef((props, ref) => {
 *   return <div ref={ref} />
 * })
 *
 * const MotionComponent = motion(Component)
 * ```
 *
 * @public
 */
function createMotionProxy(createConfig) {
    function custom(Component, customMotionComponentConfig = {}) {
        return createMotionComponent(createConfig(Component, customMotionComponentConfig));
    }
    if (typeof Proxy === "undefined") {
        return custom;
    }
    /**
     * A cache of generated `motion` components, e.g `motion.div`, `motion.input` etc.
     * Rather than generating them anew every render.
     */
    const componentCache = new Map();
    return new Proxy(custom, {
        /**
         * Called when `motion` is referenced with a prop: `motion.div`, `motion.input` etc.
         * The prop name is passed through as `key` and we can use that to generate a `motion`
         * DOM component with that name.
         */
        get: (_target, key) => {
            /**
             * If this element doesn't exist in the component cache, create it and cache.
             */
            if (!componentCache.has(key)) {
                componentCache.set(key, custom(key));
            }
            return componentCache.get(key);
        },
    });
}

/**
 * We keep these listed seperately as we use the lowercase tag names as part
 * of the runtime bundle to detect SVG components
 */
const lowercaseSVGElements = [
    "animate",
    "circle",
    "defs",
    "desc",
    "ellipse",
    "g",
    "image",
    "line",
    "filter",
    "marker",
    "mask",
    "metadata",
    "path",
    "pattern",
    "polygon",
    "polyline",
    "rect",
    "stop",
    "switch",
    "symbol",
    "svg",
    "text",
    "tspan",
    "use",
    "view",
];

function isSVGComponent(Component) {
    if (
    /**
     * If it's not a string, it's a custom React component. Currently we only support
     * HTML custom React components.
     */
    typeof Component !== "string" ||
        /**
         * If it contains a dash, the element is a custom HTML webcomponent.
         */
        Component.includes("-")) {
        return false;
    }
    else if (
    /**
     * If it's in our list of lowercase SVG tags, it's an SVG component
     */
    lowercaseSVGElements.indexOf(Component) > -1 ||
        /**
         * If it contains a capital letter, it's an SVG component
         */
        /[A-Z]/.test(Component)) {
        return true;
    }
    return false;
}

const scaleCorrectors = {};
function addScaleCorrector(correctors) {
    Object.assign(scaleCorrectors, correctors);
}

/**
 * Generate a list of every possible transform key.
 */
const transformPropOrder = [
    "transformPerspective",
    "x",
    "y",
    "z",
    "translateX",
    "translateY",
    "translateZ",
    "scale",
    "scaleX",
    "scaleY",
    "rotate",
    "rotateX",
    "rotateY",
    "rotateZ",
    "skew",
    "skewX",
    "skewY",
];
/**
 * A quick lookup for transform props.
 */
const transformProps = new Set(transformPropOrder);

function isForcedMotionValue(key, { layout, layoutId }) {
    return (transformProps.has(key) ||
        key.startsWith("origin") ||
        ((layout || layoutId !== undefined) &&
            (!!scaleCorrectors[key] || key === "opacity")));
}

const isMotionValue = (value) => Boolean(value && value.getVelocity);

const translateAlias = {
    x: "translateX",
    y: "translateY",
    z: "translateZ",
    transformPerspective: "perspective",
};
const numTransforms = transformPropOrder.length;
/**
 * Build a CSS transform style from individual x/y/scale etc properties.
 *
 * This outputs with a default order of transforms/scales/rotations, this can be customised by
 * providing a transformTemplate function.
 */
function buildTransform(transform, { enableHardwareAcceleration = true, allowTransformNone = true, }, transformIsDefault, transformTemplate) {
    // The transform string we're going to build into.
    let transformString = "";
    /**
     * Loop over all possible transforms in order, adding the ones that
     * are present to the transform string.
     */
    for (let i = 0; i < numTransforms; i++) {
        const key = transformPropOrder[i];
        if (transform[key] !== undefined) {
            const transformName = translateAlias[key] || key;
            transformString += `${transformName}(${transform[key]}) `;
        }
    }
    if (enableHardwareAcceleration && !transform.z) {
        transformString += "translateZ(0)";
    }
    transformString = transformString.trim();
    // If we have a custom `transform` template, pass our transform values and
    // generated transformString to that before returning
    if (transformTemplate) {
        transformString = transformTemplate(transform, transformIsDefault ? "" : transformString);
    }
    else if (allowTransformNone && transformIsDefault) {
        transformString = "none";
    }
    return transformString;
}

const checkStringStartsWith = (token) => (key) => typeof key === "string" && key.startsWith(token);
const isCSSVariableName = checkStringStartsWith("--");
const isCSSVariableToken = checkStringStartsWith("var(--");

/**
 * Provided a value and a ValueType, returns the value as that value type.
 */
const getValueAsType = (value, type) => {
    return type && typeof value === "number"
        ? type.transform(value)
        : value;
};

const clamp = (min, max, v) => Math.min(Math.max(v, min), max);

const number = {
    test: (v) => typeof v === "number",
    parse: parseFloat,
    transform: (v) => v,
};
const alpha = {
    ...number,
    transform: (v) => clamp(0, 1, v),
};
const scale = {
    ...number,
    default: 1,
};

/**
 * TODO: When we move from string as a source of truth to data models
 * everything in this folder should probably be referred to as models vs types
 */
// If this number is a decimal, make it just five decimal places
// to avoid exponents
const sanitize = (v) => Math.round(v * 100000) / 100000;
const floatRegex = /(-)?([\d]*\.?[\d])+/g;
const colorRegex = /(#[0-9a-f]{3,8}|(rgb|hsl)a?\((-?[\d\.]+%?[,\s]+){2}(-?[\d\.]+%?)\s*[\,\/]?\s*[\d\.]*%?\))/gi;
const singleColorRegex = /^(#[0-9a-f]{3,8}|(rgb|hsl)a?\((-?[\d\.]+%?[,\s]+){2}(-?[\d\.]+%?)\s*[\,\/]?\s*[\d\.]*%?\))$/i;
function isString(v) {
    return typeof v === "string";
}

const createUnitType = (unit) => ({
    test: (v) => isString(v) && v.endsWith(unit) && v.split(" ").length === 1,
    parse: parseFloat,
    transform: (v) => `${v}${unit}`,
});
const degrees = createUnitType("deg");
const percent = createUnitType("%");
const px = createUnitType("px");
const vh = createUnitType("vh");
const vw = createUnitType("vw");
const progressPercentage = {
    ...percent,
    parse: (v) => percent.parse(v) / 100,
    transform: (v) => percent.transform(v * 100),
};

const int = {
    ...number,
    transform: Math.round,
};

const numberValueTypes = {
    // Border props
    borderWidth: px,
    borderTopWidth: px,
    borderRightWidth: px,
    borderBottomWidth: px,
    borderLeftWidth: px,
    borderRadius: px,
    radius: px,
    borderTopLeftRadius: px,
    borderTopRightRadius: px,
    borderBottomRightRadius: px,
    borderBottomLeftRadius: px,
    // Positioning props
    width: px,
    maxWidth: px,
    height: px,
    maxHeight: px,
    size: px,
    top: px,
    right: px,
    bottom: px,
    left: px,
    // Spacing props
    padding: px,
    paddingTop: px,
    paddingRight: px,
    paddingBottom: px,
    paddingLeft: px,
    margin: px,
    marginTop: px,
    marginRight: px,
    marginBottom: px,
    marginLeft: px,
    // Transform props
    rotate: degrees,
    rotateX: degrees,
    rotateY: degrees,
    rotateZ: degrees,
    scale,
    scaleX: scale,
    scaleY: scale,
    scaleZ: scale,
    skew: degrees,
    skewX: degrees,
    skewY: degrees,
    distance: px,
    translateX: px,
    translateY: px,
    translateZ: px,
    x: px,
    y: px,
    z: px,
    perspective: px,
    transformPerspective: px,
    opacity: alpha,
    originX: progressPercentage,
    originY: progressPercentage,
    originZ: px,
    // Misc
    zIndex: int,
    // SVG
    fillOpacity: alpha,
    strokeOpacity: alpha,
    numOctaves: int,
};

function buildHTMLStyles(state, latestValues, options, transformTemplate) {
    const { style, vars, transform, transformOrigin } = state;
    // Track whether we encounter any transform or transformOrigin values.
    let hasTransform = false;
    let hasTransformOrigin = false;
    // Does the calculated transform essentially equal "none"?
    let transformIsNone = true;
    /**
     * Loop over all our latest animated values and decide whether to handle them
     * as a style or CSS variable.
     *
     * Transforms and transform origins are kept seperately for further processing.
     */
    for (const key in latestValues) {
        const value = latestValues[key];
        /**
         * If this is a CSS variable we don't do any further processing.
         */
        if (isCSSVariableName(key)) {
            vars[key] = value;
            continue;
        }
        // Convert the value to its default value type, ie 0 -> "0px"
        const valueType = numberValueTypes[key];
        const valueAsType = getValueAsType(value, valueType);
        if (transformProps.has(key)) {
            // If this is a transform, flag to enable further transform processing
            hasTransform = true;
            transform[key] = valueAsType;
            // If we already know we have a non-default transform, early return
            if (!transformIsNone)
                continue;
            // Otherwise check to see if this is a default transform
            if (value !== (valueType.default || 0))
                transformIsNone = false;
        }
        else if (key.startsWith("origin")) {
            // If this is a transform origin, flag and enable further transform-origin processing
            hasTransformOrigin = true;
            transformOrigin[key] = valueAsType;
        }
        else {
            style[key] = valueAsType;
        }
    }
    if (!latestValues.transform) {
        if (hasTransform || transformTemplate) {
            style.transform = buildTransform(state.transform, options, transformIsNone, transformTemplate);
        }
        else if (style.transform) {
            /**
             * If we have previously created a transform but currently don't have any,
             * reset transform style to none.
             */
            style.transform = "none";
        }
    }
    /**
     * Build a transformOrigin style. Uses the same defaults as the browser for
     * undefined origins.
     */
    if (hasTransformOrigin) {
        const { originX = "50%", originY = "50%", originZ = 0, } = transformOrigin;
        style.transformOrigin = `${originX} ${originY} ${originZ}`;
    }
}

const createHtmlRenderState = () => ({
    style: {},
    transform: {},
    transformOrigin: {},
    vars: {},
});

function copyRawValuesOnly(target, source, props) {
    for (const key in source) {
        if (!isMotionValue(source[key]) && !isForcedMotionValue(key, props)) {
            target[key] = source[key];
        }
    }
}
function useInitialMotionValues({ transformTemplate }, visualState, isStatic) {
    return React.useMemo(() => {
        const state = createHtmlRenderState();
        buildHTMLStyles(state, visualState, { enableHardwareAcceleration: !isStatic }, transformTemplate);
        return Object.assign({}, state.vars, state.style);
    }, [visualState]);
}
function useStyle(props, visualState, isStatic) {
    const styleProp = props.style || {};
    const style = {};
    /**
     * Copy non-Motion Values straight into style
     */
    copyRawValuesOnly(style, styleProp, props);
    Object.assign(style, useInitialMotionValues(props, visualState, isStatic));
    return props.transformValues ? props.transformValues(style) : style;
}
function useHTMLProps(props, visualState, isStatic) {
    // The `any` isn't ideal but it is the type of createElement props argument
    const htmlProps = {};
    const style = useStyle(props, visualState, isStatic);
    if (props.drag && props.dragListener !== false) {
        // Disable the ghost element when a user drags
        htmlProps.draggable = false;
        // Disable text selection
        style.userSelect =
            style.WebkitUserSelect =
                style.WebkitTouchCallout =
                    "none";
        // Disable scrolling on the draggable direction
        style.touchAction =
            props.drag === true
                ? "none"
                : `pan-${props.drag === "x" ? "y" : "x"}`;
    }
    if (props.tabIndex === undefined &&
        (props.onTap || props.onTapStart || props.whileTap)) {
        htmlProps.tabIndex = 0;
    }
    htmlProps.style = style;
    return htmlProps;
}

/**
 * A list of all valid MotionProps.
 *
 * @privateRemarks
 * This doesn't throw if a `MotionProp` name is missing - it should.
 */
const validMotionProps = new Set([
    "animate",
    "exit",
    "variants",
    "initial",
    "style",
    "values",
    "variants",
    "transition",
    "transformTemplate",
    "transformValues",
    "custom",
    "inherit",
    "onLayoutAnimationStart",
    "onLayoutAnimationComplete",
    "onLayoutMeasure",
    "onBeforeLayoutMeasure",
    "onAnimationStart",
    "onAnimationComplete",
    "onUpdate",
    "onDragStart",
    "onDrag",
    "onDragEnd",
    "onMeasureDragConstraints",
    "onDirectionLock",
    "onDragTransitionEnd",
    "_dragX",
    "_dragY",
    "onHoverStart",
    "onHoverEnd",
    "onViewportEnter",
    "onViewportLeave",
    "ignoreStrict",
    "viewport",
]);
/**
 * Check whether a prop name is a valid `MotionProp` key.
 *
 * @param key - Name of the property to check
 * @returns `true` is key is a valid `MotionProp`.
 *
 * @public
 */
function isValidMotionProp(key) {
    return (key.startsWith("while") ||
        (key.startsWith("drag") && key !== "draggable") ||
        key.startsWith("layout") ||
        key.startsWith("onTap") ||
        key.startsWith("onPan") ||
        validMotionProps.has(key));
}

let shouldForward = (key) => !isValidMotionProp(key);
function loadExternalIsValidProp(isValidProp) {
    if (!isValidProp)
        return;
    // Explicitly filter our events
    shouldForward = (key) => key.startsWith("on") ? !isValidMotionProp(key) : isValidProp(key);
}
/**
 * Emotion and Styled Components both allow users to pass through arbitrary props to their components
 * to dynamically generate CSS. They both use the `@emotion/is-prop-valid` package to determine which
 * of these should be passed to the underlying DOM node.
 *
 * However, when styling a Motion component `styled(motion.div)`, both packages pass through *all* props
 * as it's seen as an arbitrary component rather than a DOM node. Motion only allows arbitrary props
 * passed through the `custom` prop so it doesn't *need* the payload or computational overhead of
 * `@emotion/is-prop-valid`, however to fix this problem we need to use it.
 *
 * By making it an optionalDependency we can offer this functionality only in the situations where it's
 * actually required.
 */
try {
    /**
     * We attempt to import this package but require won't be defined in esm environments, in that case
     * isPropValid will have to be provided via `MotionContext`. In a 6.0.0 this should probably be removed
     * in favour of explicit injection.
     */
    loadExternalIsValidProp(require("@emotion/is-prop-valid").default);
}
catch (_a) {
    // We don't need to actually do anything here - the fallback is the existing `isPropValid`.
}
function filterProps(props, isDom, forwardMotionProps) {
    const filteredProps = {};
    for (const key in props) {
        /**
         * values is considered a valid prop by Emotion, so if it's present
         * this will be rendered out to the DOM unless explicitly filtered.
         *
         * We check the type as it could be used with the `feColorMatrix`
         * element, which we support.
         */
        if (key === "values" && typeof props.values === "object")
            continue;
        if (shouldForward(key) ||
            (forwardMotionProps === true && isValidMotionProp(key)) ||
            (!isDom && !isValidMotionProp(key)) ||
            // If trying to use native HTML drag events, forward drag listeners
            (props["draggable"] && key.startsWith("onDrag"))) {
            filteredProps[key] = props[key];
        }
    }
    return filteredProps;
}

function calcOrigin$1(origin, offset, size) {
    return typeof origin === "string"
        ? origin
        : px.transform(offset + size * origin);
}
/**
 * The SVG transform origin defaults are different to CSS and is less intuitive,
 * so we use the measured dimensions of the SVG to reconcile these.
 */
function calcSVGTransformOrigin(dimensions, originX, originY) {
    const pxOriginX = calcOrigin$1(originX, dimensions.x, dimensions.width);
    const pxOriginY = calcOrigin$1(originY, dimensions.y, dimensions.height);
    return `${pxOriginX} ${pxOriginY}`;
}

const dashKeys = {
    offset: "stroke-dashoffset",
    array: "stroke-dasharray",
};
const camelKeys = {
    offset: "strokeDashoffset",
    array: "strokeDasharray",
};
/**
 * Build SVG path properties. Uses the path's measured length to convert
 * our custom pathLength, pathSpacing and pathOffset into stroke-dashoffset
 * and stroke-dasharray attributes.
 *
 * This function is mutative to reduce per-frame GC.
 */
function buildSVGPath(attrs, length, spacing = 1, offset = 0, useDashCase = true) {
    // Normalise path length by setting SVG attribute pathLength to 1
    attrs.pathLength = 1;
    // We use dash case when setting attributes directly to the DOM node and camel case
    // when defining props on a React component.
    const keys = useDashCase ? dashKeys : camelKeys;
    // Build the dash offset
    attrs[keys.offset] = px.transform(-offset);
    // Build the dash array
    const pathLength = px.transform(length);
    const pathSpacing = px.transform(spacing);
    attrs[keys.array] = `${pathLength} ${pathSpacing}`;
}

/**
 * Build SVG visual attrbutes, like cx and style.transform
 */
function buildSVGAttrs(state, { attrX, attrY, originX, originY, pathLength, pathSpacing = 1, pathOffset = 0, 
// This is object creation, which we try to avoid per-frame.
...latest }, options, isSVGTag, transformTemplate) {
    buildHTMLStyles(state, latest, options, transformTemplate);
    /**
     * For svg tags we just want to make sure viewBox is animatable and treat all the styles
     * as normal HTML tags.
     */
    if (isSVGTag) {
        if (state.style.viewBox) {
            state.attrs.viewBox = state.style.viewBox;
        }
        return;
    }
    state.attrs = state.style;
    state.style = {};
    const { attrs, style, dimensions } = state;
    /**
     * However, we apply transforms as CSS transforms. So if we detect a transform we take it from attrs
     * and copy it into style.
     */
    if (attrs.transform) {
        if (dimensions)
            style.transform = attrs.transform;
        delete attrs.transform;
    }
    // Parse transformOrigin
    if (dimensions &&
        (originX !== undefined || originY !== undefined || style.transform)) {
        style.transformOrigin = calcSVGTransformOrigin(dimensions, originX !== undefined ? originX : 0.5, originY !== undefined ? originY : 0.5);
    }
    // Treat x/y not as shortcuts but as actual attributes
    if (attrX !== undefined)
        attrs.x = attrX;
    if (attrY !== undefined)
        attrs.y = attrY;
    // Build SVG path if one has been defined
    if (pathLength !== undefined) {
        buildSVGPath(attrs, pathLength, pathSpacing, pathOffset, false);
    }
}

const createSvgRenderState = () => ({
    ...createHtmlRenderState(),
    attrs: {},
});

const isSVGTag = (tag) => typeof tag === "string" && tag.toLowerCase() === "svg";

function useSVGProps(props, visualState, _isStatic, Component) {
    const visualProps = React.useMemo(() => {
        const state = createSvgRenderState();
        buildSVGAttrs(state, visualState, { enableHardwareAcceleration: false }, isSVGTag(Component), props.transformTemplate);
        return {
            ...state.attrs,
            style: { ...state.style },
        };
    }, [visualState]);
    if (props.style) {
        const rawStyles = {};
        copyRawValuesOnly(rawStyles, props.style, props);
        visualProps.style = { ...rawStyles, ...visualProps.style };
    }
    return visualProps;
}

function createUseRender(forwardMotionProps = false) {
    const useRender = (Component, props, projectionId, ref, { latestValues }, isStatic) => {
        const useVisualProps = isSVGComponent(Component)
            ? useSVGProps
            : useHTMLProps;
        const visualProps = useVisualProps(props, latestValues, isStatic, Component);
        const filteredProps = filterProps(props, typeof Component === "string", forwardMotionProps);
        const elementProps = {
            ...filteredProps,
            ...visualProps,
            ref,
        };
        /**
         * If component has been handed a motion value as its child,
         * memoise its initial value and render that. Subsequent updates
         * will be handled by the onChange handler
         */
        const { children } = props;
        const renderedChildren = React.useMemo(() => (isMotionValue(children) ? children.get() : children), [children]);
        if (projectionId) {
            elementProps["data-projection-id"] = projectionId;
        }
        return React.createElement(Component, {
            ...elementProps,
            children: renderedChildren,
        });
    };
    return useRender;
}

/**
 * Convert camelCase to dash-case properties.
 */
const camelToDash = (str) => str.replace(/([a-z])([A-Z])/g, "$1-$2").toLowerCase();

function renderHTML(element, { style, vars }, styleProp, projection) {
    Object.assign(element.style, style, projection && projection.getProjectionStyles(styleProp));
    // Loop over any CSS variables and assign those.
    for (const key in vars) {
        element.style.setProperty(key, vars[key]);
    }
}

/**
 * A set of attribute names that are always read/written as camel case.
 */
const camelCaseAttributes = new Set([
    "baseFrequency",
    "diffuseConstant",
    "kernelMatrix",
    "kernelUnitLength",
    "keySplines",
    "keyTimes",
    "limitingConeAngle",
    "markerHeight",
    "markerWidth",
    "numOctaves",
    "targetX",
    "targetY",
    "surfaceScale",
    "specularConstant",
    "specularExponent",
    "stdDeviation",
    "tableValues",
    "viewBox",
    "gradientTransform",
    "pathLength",
    "startOffset",
    "textLength",
    "lengthAdjust",
]);

function renderSVG(element, renderState, _styleProp, projection) {
    renderHTML(element, renderState, undefined, projection);
    for (const key in renderState.attrs) {
        element.setAttribute(!camelCaseAttributes.has(key) ? camelToDash(key) : key, renderState.attrs[key]);
    }
}

function scrapeMotionValuesFromProps$1(props, prevProps) {
    const { style } = props;
    const newValues = {};
    for (const key in style) {
        if (isMotionValue(style[key]) ||
            (prevProps.style && isMotionValue(prevProps.style[key])) ||
            isForcedMotionValue(key, props)) {
            newValues[key] = style[key];
        }
    }
    return newValues;
}

function scrapeMotionValuesFromProps(props, prevProps) {
    const newValues = scrapeMotionValuesFromProps$1(props, prevProps);
    for (const key in props) {
        if (isMotionValue(props[key]) || isMotionValue(prevProps[key])) {
            const targetKey = key === "x" || key === "y" ? "attr" + key.toUpperCase() : key;
            newValues[targetKey] = props[key];
        }
    }
    return newValues;
}

function resolveVariantFromProps(props, definition, custom, currentValues = {}, currentVelocity = {}) {
    /**
     * If the variant definition is a function, resolve.
     */
    if (typeof definition === "function") {
        definition = definition(custom !== undefined ? custom : props.custom, currentValues, currentVelocity);
    }
    /**
     * If the variant definition is a variant label, or
     * the function returned a variant label, resolve.
     */
    if (typeof definition === "string") {
        definition = props.variants && props.variants[definition];
    }
    /**
     * At this point we've resolved both functions and variant labels,
     * but the resolved variant label might itself have been a function.
     * If so, resolve. This can only have returned a valid target object.
     */
    if (typeof definition === "function") {
        definition = definition(custom !== undefined ? custom : props.custom, currentValues, currentVelocity);
    }
    return definition;
}

const isKeyframesTarget = (v) => {
    return Array.isArray(v);
};

const isCustomValue = (v) => {
    return Boolean(v && typeof v === "object" && v.mix && v.toValue);
};
const resolveFinalValueInKeyframes = (v) => {
    // TODO maybe throw if v.length - 1 is placeholder token?
    return isKeyframesTarget(v) ? v[v.length - 1] || 0 : v;
};

/**
 * If the provided value is a MotionValue, this returns the actual value, otherwise just the value itself
 *
 * TODO: Remove and move to library
 */
function resolveMotionValue(value) {
    const unwrappedValue = isMotionValue(value) ? value.get() : value;
    return isCustomValue(unwrappedValue)
        ? unwrappedValue.toValue()
        : unwrappedValue;
}

function makeState({ scrapeMotionValuesFromProps, createRenderState, onMount, }, props, context, presenceContext) {
    const state = {
        latestValues: makeLatestValues(props, context, presenceContext, scrapeMotionValuesFromProps),
        renderState: createRenderState(),
    };
    if (onMount) {
        state.mount = (instance) => onMount(props, instance, state);
    }
    return state;
}
const makeUseVisualState = (config) => (props, isStatic) => {
    const context = React.useContext(MotionContext);
    const presenceContext = React.useContext(PresenceContext);
    const make = () => makeState(config, props, context, presenceContext);
    return isStatic ? make() : useConstant(make);
};
function makeLatestValues(props, context, presenceContext, scrapeMotionValues) {
    const values = {};
    const motionValues = scrapeMotionValues(props, {});
    for (const key in motionValues) {
        values[key] = resolveMotionValue(motionValues[key]);
    }
    let { initial, animate } = props;
    const isControllingVariants$1 = isControllingVariants(props);
    const isVariantNode$1 = isVariantNode(props);
    if (context &&
        isVariantNode$1 &&
        !isControllingVariants$1 &&
        props.inherit !== false) {
        if (initial === undefined)
            initial = context.initial;
        if (animate === undefined)
            animate = context.animate;
    }
    let isInitialAnimationBlocked = presenceContext
        ? presenceContext.initial === false
        : false;
    isInitialAnimationBlocked = isInitialAnimationBlocked || initial === false;
    const variantToSet = isInitialAnimationBlocked ? animate : initial;
    if (variantToSet &&
        typeof variantToSet !== "boolean" &&
        !isAnimationControls(variantToSet)) {
        const list = Array.isArray(variantToSet) ? variantToSet : [variantToSet];
        list.forEach((definition) => {
            const resolved = resolveVariantFromProps(props, definition);
            if (!resolved)
                return;
            const { transitionEnd, transition, ...target } = resolved;
            for (const key in target) {
                let valueTarget = target[key];
                if (Array.isArray(valueTarget)) {
                    /**
                     * Take final keyframe if the initial animation is blocked because
                     * we want to initialise at the end of that blocked animation.
                     */
                    const index = isInitialAnimationBlocked
                        ? valueTarget.length - 1
                        : 0;
                    valueTarget = valueTarget[index];
                }
                if (valueTarget !== null) {
                    values[key] = valueTarget;
                }
            }
            for (const key in transitionEnd)
                values[key] = transitionEnd[key];
        });
    }
    return values;
}

const svgMotionConfig = {
    useVisualState: makeUseVisualState({
        scrapeMotionValuesFromProps: scrapeMotionValuesFromProps,
        createRenderState: createSvgRenderState,
        onMount: (props, instance, { renderState, latestValues }) => {
            try {
                renderState.dimensions =
                    typeof instance.getBBox ===
                        "function"
                        ? instance.getBBox()
                        : instance.getBoundingClientRect();
            }
            catch (e) {
                // Most likely trying to measure an unrendered element under Firefox
                renderState.dimensions = {
                    x: 0,
                    y: 0,
                    width: 0,
                    height: 0,
                };
            }
            buildSVGAttrs(renderState, latestValues, { enableHardwareAcceleration: false }, isSVGTag(instance.tagName), props.transformTemplate);
            renderSVG(instance, renderState);
        },
    }),
};

const htmlMotionConfig = {
    useVisualState: makeUseVisualState({
        scrapeMotionValuesFromProps: scrapeMotionValuesFromProps$1,
        createRenderState: createHtmlRenderState,
    }),
};

function createDomMotionConfig(Component, { forwardMotionProps = false }, preloadedFeatures, createVisualElement) {
    const baseConfig = isSVGComponent(Component)
        ? svgMotionConfig
        : htmlMotionConfig;
    return {
        ...baseConfig,
        preloadedFeatures,
        useRender: createUseRender(forwardMotionProps),
        createVisualElement,
        Component,
    };
}

function addDomEvent(target, eventName, handler, options = { passive: true }) {
    target.addEventListener(eventName, handler, options);
    return () => target.removeEventListener(eventName, handler);
}

const isPrimaryPointer = (event) => {
    if (event.pointerType === "mouse") {
        return typeof event.button !== "number" || event.button <= 0;
    }
    else {
        /**
         * isPrimary is true for all mice buttons, whereas every touch point
         * is regarded as its own input. So subsequent concurrent touch points
         * will be false.
         *
         * Specifically match against false here as incomplete versions of
         * PointerEvents in very old browser might have it set as undefined.
         */
        return event.isPrimary !== false;
    }
};

function extractEventInfo(event, pointType = "page") {
    return {
        point: {
            x: event[pointType + "X"],
            y: event[pointType + "Y"],
        },
    };
}
const addPointerInfo = (handler) => {
    return (event) => isPrimaryPointer(event) && handler(event, extractEventInfo(event));
};

function addPointerEvent(target, eventName, handler, options) {
    return addDomEvent(target, eventName, addPointerInfo(handler), options);
}

/**
 * Pipe
 * Compose other transformers to run linearily
 * pipe(min(20), max(40))
 * @param  {...functions} transformers
 * @return {function}
 */
const combineFunctions = (a, b) => (v) => b(a(v));
const pipe = (...transformers) => transformers.reduce(combineFunctions);

function createLock(name) {
    let lock = null;
    return () => {
        const openLock = () => {
            lock = null;
        };
        if (lock === null) {
            lock = name;
            return openLock;
        }
        return false;
    };
}
const globalHorizontalLock = createLock("dragHorizontal");
const globalVerticalLock = createLock("dragVertical");
function getGlobalLock(drag) {
    let lock = false;
    if (drag === "y") {
        lock = globalVerticalLock();
    }
    else if (drag === "x") {
        lock = globalHorizontalLock();
    }
    else {
        const openHorizontal = globalHorizontalLock();
        const openVertical = globalVerticalLock();
        if (openHorizontal && openVertical) {
            lock = () => {
                openHorizontal();
                openVertical();
            };
        }
        else {
            // Release the locks because we don't use them
            if (openHorizontal)
                openHorizontal();
            if (openVertical)
                openVertical();
        }
    }
    return lock;
}
function isDragActive() {
    // Check the gesture lock - if we get it, it means no drag gesture is active
    // and we can safely fire the tap gesture.
    const openGestureLock = getGlobalLock(true);
    if (!openGestureLock)
        return true;
    openGestureLock();
    return false;
}

class Feature {
    constructor(node) {
        this.isMounted = false;
        this.node = node;
    }
    update() { }
}

function createRenderStep(runNextFrame) {
    /**
     * We create and reuse two arrays, one to queue jobs for the current frame
     * and one for the next. We reuse to avoid triggering GC after x frames.
     */
    let toRun = [];
    let toRunNextFrame = [];
    /**
     *
     */
    let numToRun = 0;
    /**
     * Track whether we're currently processing jobs in this step. This way
     * we can decide whether to schedule new jobs for this frame or next.
     */
    let isProcessing = false;
    let flushNextFrame = false;
    /**
     * A set of processes which were marked keepAlive when scheduled.
     */
    const toKeepAlive = new WeakSet();
    const step = {
        /**
         * Schedule a process to run on the next frame.
         */
        schedule: (callback, keepAlive = false, immediate = false) => {
            const addToCurrentFrame = immediate && isProcessing;
            const buffer = addToCurrentFrame ? toRun : toRunNextFrame;
            if (keepAlive)
                toKeepAlive.add(callback);
            // If the buffer doesn't already contain this callback, add it
            if (buffer.indexOf(callback) === -1) {
                buffer.push(callback);
                // If we're adding it to the currently running buffer, update its measured size
                if (addToCurrentFrame && isProcessing)
                    numToRun = toRun.length;
            }
            return callback;
        },
        /**
         * Cancel the provided callback from running on the next frame.
         */
        cancel: (callback) => {
            const index = toRunNextFrame.indexOf(callback);
            if (index !== -1)
                toRunNextFrame.splice(index, 1);
            toKeepAlive.delete(callback);
        },
        /**
         * Execute all schedule callbacks.
         */
        process: (frameData) => {
            /**
             * If we're already processing we've probably been triggered by a flushSync
             * inside an existing process. Instead of executing, mark flushNextFrame
             * as true and ensure we flush the following frame at the end of this one.
             */
            if (isProcessing) {
                flushNextFrame = true;
                return;
            }
            isProcessing = true;
            [toRun, toRunNextFrame] = [toRunNextFrame, toRun];
            // Clear the next frame list
            toRunNextFrame.length = 0;
            // Execute this frame
            numToRun = toRun.length;
            if (numToRun) {
                for (let i = 0; i < numToRun; i++) {
                    const callback = toRun[i];
                    callback(frameData);
                    if (toKeepAlive.has(callback)) {
                        step.schedule(callback);
                        runNextFrame();
                    }
                }
            }
            isProcessing = false;
            if (flushNextFrame) {
                flushNextFrame = false;
                step.process(frameData);
            }
        },
    };
    return step;
}

const frameData = {
    delta: 0,
    timestamp: 0,
};

const maxElapsed = 40;
let useDefaultElapsed = true;
let runNextFrame = false;
let isProcessing = false;
const stepsOrder = [
    "read",
    "update",
    "preRender",
    "render",
    "postRender",
];
const steps = stepsOrder.reduce((acc, key) => {
    acc[key] = createRenderStep(() => (runNextFrame = true));
    return acc;
}, {});
const sync = stepsOrder.reduce((acc, key) => {
    const step = steps[key];
    acc[key] = (process, keepAlive = false, immediate = false) => {
        if (!runNextFrame)
            startLoop();
        return step.schedule(process, keepAlive, immediate);
    };
    return acc;
}, {});
const cancelSync = stepsOrder.reduce((acc, key) => {
    acc[key] = steps[key].cancel;
    return acc;
}, {});
const flushSync = stepsOrder.reduce((acc, key) => {
    acc[key] = () => steps[key].process(frameData);
    return acc;
}, {});
const processStep = (stepId) => steps[stepId