📚 Documentação inicial do ALETHEIA
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frontend/node_modules/framer-motion/dist/es/components/AnimatePresence/index.mjs
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166
frontend/node_modules/framer-motion/dist/es/components/AnimatePresence/index.mjs
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"use client";
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import { jsx, Fragment } from 'react/jsx-runtime';
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import { useMemo, useRef, useState, useContext } from 'react';
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import { LayoutGroupContext } from '../../context/LayoutGroupContext.mjs';
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import { useConstant } from '../../utils/use-constant.mjs';
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import { PresenceChild } from './PresenceChild.mjs';
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import { usePresence } from './use-presence.mjs';
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import { onlyElements, getChildKey } from './utils.mjs';
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import { useIsomorphicLayoutEffect } from '../../utils/use-isomorphic-effect.mjs';
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/**
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* `AnimatePresence` enables the animation of components that have been removed from the tree.
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*
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* When adding/removing more than a single child, every child **must** be given a unique `key` prop.
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*
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* Any `motion` components that have an `exit` property defined will animate out when removed from
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* the tree.
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*
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* ```jsx
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* import { motion, AnimatePresence } from 'framer-motion'
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*
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* export const Items = ({ items }) => (
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* <AnimatePresence>
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* {items.map(item => (
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* <motion.div
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* key={item.id}
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* initial={{ opacity: 0 }}
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* animate={{ opacity: 1 }}
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* exit={{ opacity: 0 }}
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* />
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* ))}
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* </AnimatePresence>
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* )
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* ```
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*
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* You can sequence exit animations throughout a tree using variants.
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*
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* If a child contains multiple `motion` components with `exit` props, it will only unmount the child
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* once all `motion` components have finished animating out. Likewise, any components using
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* `usePresence` all need to call `safeToRemove`.
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*
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* @public
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*/
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const AnimatePresence = ({ children, custom, initial = true, onExitComplete, presenceAffectsLayout = true, mode = "sync", propagate = false, }) => {
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const [isParentPresent, safeToRemove] = usePresence(propagate);
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/**
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* Filter any children that aren't ReactElements. We can only track components
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* between renders with a props.key.
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*/
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const presentChildren = useMemo(() => onlyElements(children), [children]);
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/**
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* Track the keys of the currently rendered children. This is used to
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* determine which children are exiting.
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*/
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const presentKeys = propagate && !isParentPresent ? [] : presentChildren.map(getChildKey);
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/**
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* If `initial={false}` we only want to pass this to components in the first render.
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*/
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const isInitialRender = useRef(true);
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/**
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* A ref containing the currently present children. When all exit animations
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* are complete, we use this to re-render the component with the latest children
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* *committed* rather than the latest children *rendered*.
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*/
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const pendingPresentChildren = useRef(presentChildren);
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/**
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* Track which exiting children have finished animating out.
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*/
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const exitComplete = useConstant(() => new Map());
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/**
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* Save children to render as React state. To ensure this component is concurrent-safe,
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* we check for exiting children via an effect.
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*/
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const [diffedChildren, setDiffedChildren] = useState(presentChildren);
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const [renderedChildren, setRenderedChildren] = useState(presentChildren);
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useIsomorphicLayoutEffect(() => {
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isInitialRender.current = false;
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pendingPresentChildren.current = presentChildren;
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/**
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* Update complete status of exiting children.
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*/
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for (let i = 0; i < renderedChildren.length; i++) {
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const key = getChildKey(renderedChildren[i]);
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if (!presentKeys.includes(key)) {
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if (exitComplete.get(key) !== true) {
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exitComplete.set(key, false);
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}
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}
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else {
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exitComplete.delete(key);
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}
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}
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}, [renderedChildren, presentKeys.length, presentKeys.join("-")]);
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const exitingChildren = [];
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if (presentChildren !== diffedChildren) {
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let nextChildren = [...presentChildren];
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/**
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* Loop through all the currently rendered components and decide which
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* are exiting.
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*/
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for (let i = 0; i < renderedChildren.length; i++) {
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const child = renderedChildren[i];
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const key = getChildKey(child);
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if (!presentKeys.includes(key)) {
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nextChildren.splice(i, 0, child);
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exitingChildren.push(child);
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}
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}
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/**
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* If we're in "wait" mode, and we have exiting children, we want to
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* only render these until they've all exited.
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*/
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if (mode === "wait" && exitingChildren.length) {
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nextChildren = exitingChildren;
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}
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setRenderedChildren(onlyElements(nextChildren));
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setDiffedChildren(presentChildren);
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/**
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* Early return to ensure once we've set state with the latest diffed
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* children, we can immediately re-render.
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*/
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return;
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}
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if (process.env.NODE_ENV !== "production" &&
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mode === "wait" &&
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renderedChildren.length > 1) {
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console.warn(`You're attempting to animate multiple children within AnimatePresence, but its mode is set to "wait". This will lead to odd visual behaviour.`);
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}
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/**
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* If we've been provided a forceRender function by the LayoutGroupContext,
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* we can use it to force a re-render amongst all surrounding components once
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* all components have finished animating out.
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*/
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const { forceRender } = useContext(LayoutGroupContext);
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return (jsx(Fragment, { children: renderedChildren.map((child) => {
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const key = getChildKey(child);
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const isPresent = propagate && !isParentPresent
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? false
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: presentChildren === renderedChildren ||
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presentKeys.includes(key);
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const onExit = () => {
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if (exitComplete.has(key)) {
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exitComplete.set(key, true);
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}
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else {
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return;
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}
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let isEveryExitComplete = true;
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exitComplete.forEach((isExitComplete) => {
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if (!isExitComplete)
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isEveryExitComplete = false;
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});
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if (isEveryExitComplete) {
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forceRender === null || forceRender === void 0 ? void 0 : forceRender();
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setRenderedChildren(pendingPresentChildren.current);
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propagate && (safeToRemove === null || safeToRemove === void 0 ? void 0 : safeToRemove());
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onExitComplete && onExitComplete();
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}
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};
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return (jsx(PresenceChild, { isPresent: isPresent, initial: !isInitialRender.current || initial
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? undefined
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: false, custom: isPresent ? undefined : custom, presenceAffectsLayout: presenceAffectsLayout, mode: mode, onExitComplete: isPresent ? undefined : onExit, children: child }, key));
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}) }));
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};
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export { AnimatePresence };
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