13 lines
564 B
JavaScript
13 lines
564 B
JavaScript
const reverseEasing = easing => p => 1 - easing(1 - p);
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const mirrorEasing = easing => p => p <= 0.5 ? easing(2 * p) / 2 : (2 - easing(2 * (1 - p))) / 2;
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const createExpoIn = (power) => p => Math.pow(p, power);
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const createBackIn = (power) => p => p * p * ((power + 1) * p - power);
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const createAnticipate = (power) => {
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const backEasing = createBackIn(power);
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return p => (p *= 2) < 1
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? 0.5 * backEasing(p)
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: 0.5 * (2 - Math.pow(2, -10 * (p - 1)));
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};
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export { createAnticipate, createBackIn, createExpoIn, mirrorEasing, reverseEasing };
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