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make crossfade scale the element to target rect #3175

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merged 2 commits into from
Jul 6, 2019
Merged

make crossfade scale the element to target rect #3175

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83e9d49
make crossfade scale the element to target rect
buhrmi Jul 4, 2019
757ebc7
fix transform origin during scaling
Jul 4, 2019
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5 changes: 4 additions & 1 deletion src/runtime/transition/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -188,6 +188,8 @@ export function crossfade({ fallback, ...defaults }: CrossfadeParams & {
const to = node.getBoundingClientRect();
const dx = from.left - to.left;
const dy = from.top - to.top;
const dw = from.width / to.width;
const dh = from.height / to.height;
const d = Math.sqrt(dx * dx + dy * dy);

const style = getComputedStyle(node);
Expand All @@ -200,7 +202,8 @@ export function crossfade({ fallback, ...defaults }: CrossfadeParams & {
easing,
css: (t, u) => `
opacity: ${t * opacity};
transform: ${transform} translate(${u * dx}px,${u * dy}px);
transform-origin: top left;
transform: ${transform} translate(${u * dx}px,${u * dy}px) scale(${t + (1-t) * dw}, ${t + (1-t) * dh});
`
};
}
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