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toggle reverse on useTransitions #1896

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toggle reverse on useTransitions #1896

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fa60011
reverses useTransition
Supersteve128 May 19, 2022
0f6f6c3
Update transition.ts
Supersteve128 May 19, 2022
a736eec
Update transition.ts
Supersteve128 May 19, 2022
a83a159
Update transition.ts
Supersteve128 May 19, 2022
389dd67
Update App.tsx
Supersteve128 May 19, 2022
1627d32
replaced reverse prop from transition
Supersteve128 May 19, 2022
1d6f848
Merge branch 'master' into master
Supersteve128 Jul 18, 2022
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3 changes: 2 additions & 1 deletion demo/src/sandboxes/chain/src/App.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@ export default function App() {
from: { opacity: 0, scale: 0 },
enter: { opacity: 1, scale: 1 },
leave: { opacity: 0, scale: 0 },
toggleReverse: true
})

// This will orchestrate the two animations above, comment the last arg and it creates a sequence
Expand All @@ -51,7 +52,7 @@ export default function App() {
className={styles.item}
style={{ ...style, background: item.css }}
/>
))}
), !open)}
</animated.div>
</div>
)
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10 changes: 8 additions & 2 deletions packages/core/src/hooks/useTransition.tsx
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Expand Up @@ -80,6 +80,7 @@ export function useTransition(
expires = true,
exitBeforeEnter = false,
onDestroyed,
toggleReverse = false,
ref: propsRef,
config: propsConfig,
}: UseTransitionProps<any> = propsFn ? propsFn() : props
Expand Down Expand Up @@ -206,6 +207,11 @@ export function useTransition(
const exitingTransitions = useRef(new Map<TransitionState, Change>())

const forceChange = useRef(false)

if (toggleReverse) {
transitions.reverse()
}

each(transitions, (t, i) => {
const key = t.key
const prevPhase = t.phase
Expand Down Expand Up @@ -425,9 +431,9 @@ export function useTransition(
reset ? void 0 : deps
)

const renderTransitions: TransitionFn = render => (
const renderTransitions: TransitionFn = (render, reverse = false) => (
<>
{transitions.map((t, i) => {
{(reverse ? transitions.reverse() : transitions).map((t, i) => {
const { springs } = changes.get(t) || t.ctrl
const elem: any = render({ ...springs }, t.item, t, i)
return elem && elem.type ? (
Expand Down
3 changes: 2 additions & 1 deletion packages/core/src/types/transition.ts
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Expand Up @@ -62,6 +62,7 @@ export type UseTransitionProps<Item = any> = Merge<
leave?: TransitionTo<Item>
keys?: ItemKeys<Item>
sort?: (a: Item, b: Item) => number
toggleReverse?: boolean
trail?: number
exitBeforeEnter?: boolean
/**
Expand Down Expand Up @@ -111,7 +112,7 @@ export type ItemKeys<T = any> = OneOrMore<Key> | ((item: T) => Key) | null

/** The function returned by `useTransition` */
export interface TransitionFn<Item = any, State extends Lookup = Lookup> {
(render: TransitionRenderFn<Item, State>): JSX.Element
(render: TransitionRenderFn<Item, State>, reverse?: boolean): JSX.Element
}

export interface TransitionRenderFn<Item = any, State extends Lookup = Lookup> {
Expand Down