const easings = { easeLinear: (t, b, c, d) => c * t / d + b, // ease-in easeInQuad: (t, b, c, d) => c * (t /= d) * t + b, easeInCubic: (t, b, c, d) => c * (t /= d) * t * t + b, easeInQuart: (t, b, c, d) => c * (t /= d) * t * t * t + b, easeInQuint: (t, b, c, d) => c * (t /= d) * t * t * t * t + b, easeInSine: (t, b, c, d) => -c * Math.cos(t / d * (Math.PI / 2)) + c + b, easeInExpo: (t, b, c, d) => t == 0 ? b : c * Math.pow(2, 10 * (t / d - 1)) + b, easeInCirc: (t, b, c, d) => -c * (Math.sqrt(1 - (t /= d) * t) - 1) + b, easeInElastic: (t, b, c, d) => { var s = 1.70158; var p = 0; var a = c; if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * .3; if (a < Math.abs(c)) { a = c; var s = p / 4; } else var s = p / (2 * Math.PI) * Math.asin(c / a); return -(a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b; }, easeInBack: (t, b, c, d, s) => { if (s == undefined) s = 1.70158; return c * (t /= d) * t * ((s + 1) * t - s) + b; }, // ease-out easeOutQuad: (t, b, c, d) => -c * (t /= d) * (t - 2) + b, easeOutCubic: (t, b, c, d) => c * ((t = t / d - 1) * t * t + 1) + b, easeOutQuart: (t, b, c, d) => -c * ((t = t / d - 1) * t * t * t - 1) + b, easeOutQuint: (t, b, c, d) => c * ((t = t / d - 1) * t * t * t * t + 1) + b, easeOutSine: (t, b, c, d) => c * Math.sin(t / d * (Math.PI / 2)) + b, easeOutExpo: (t, b, c, d) => t == d ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b, easeOutCirc: (t, b, c, d) => c * Math.sqrt(1 - (t = t / d - 1) * t) + b, easeOutElastic: (t, b, c, d) => { var s = 1.70158; var p = 0; var a = c; if (t == 0) return b; if ((t /= d) == 1) return b + c; if (!p) p = d * .3; if (a < Math.abs(c)) { a = c; var s = p / 4; } else var s = p / (2 * Math.PI) * Math.asin(c / a); return a * Math.pow(2, -10 * t) * Math.sin((t * d - s) * (2 * Math.PI) / p) + c + b; }, easeOutBack: (t, b, c, d, s) => { if (s == undefined) s = 1.70158; return c * ((t = t / d - 1) * t * ((s + 1) * t + s) + 1) + b; }, easeOutBounce: (t, b, c, d) => { if ((t /= d) < (1 / 2.75)) { return c * (7.5625 * t * t) + b; } else if (t < (2 / 2.75)) { return c * (7.5625 * (t -= (1.5 / 2.75)) * t + .75) + b; } else if (t < (2.5 / 2.75)) { return c * (7.5625 * (t -= (2.25 / 2.75)) * t + .9375) + b; } else { return c * (7.5625 * (t -= (2.625 / 2.75)) * t + .984375) + b; } }, // ease-in-out easeInOutQuad: (t, b, c, d) => { if ((t /= d / 2) < 1) return c / 2 * t * t + b; return -c / 2 * ((--t) * (t - 2) - 1) + b; }, easeInOutCubic: (t, b, c, d) => { if ((t /= d / 2) < 1) return c / 2 * t * t * t + b; return c / 2 * ((t -= 2) * t * t + 2) + b; }, easeInOutQuart: (t, b, c, d) => { if ((t /= d / 2) < 1) return c / 2 * t * t * t * t + b; return -c / 2 * ((t -= 2) * t * t * t - 2) + b; }, easeInOutQuint: (t, b, c, d) => { if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b; return c / 2 * ((t -= 2) * t * t * t * t + 2) + b; }, easeInOutSine: (t, b, c, d) => -c / 2 * (Math.cos(Math.PI * t / d) - 1) + b, easeInOutExpo: (t, b, c, d) => { if (t == 0) return b; if (t == d) return b + c; if ((t /= d / 2) < 1) return c / 2 * Math.pow(2, 10 * (t - 1)) + b; return c / 2 * (-Math.pow(2, -10 * --t) + 2) + b; }, easeInOutCirc: (t, b, c, d) => { if ((t /= d / 2) < 1) return -c / 2 * (Math.sqrt(1 - t * t) - 1) + b; return c / 2 * (Math.sqrt(1 - (t -= 2) * t) + 1) + b; }, easeInOutElastic: (t, b, c, d) => { var s = 1.70158; var p = 0; var a = c; if (t == 0) return b; if ((t /= d / 2) == 2) return b + c; if (!p) p = d * (.3 * 1.5); if (a < Math.abs(c)) { a = c; var s = p / 4; } else var s = p / (2 * Math.PI) * Math.asin(c / a); if (t < 1) return -.5 * (a * Math.pow(2, 10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p)) + b; return a * Math.pow(2, -10 * (t -= 1)) * Math.sin((t * d - s) * (2 * Math.PI) / p) * .5 + c + b; }, easeInOutBack: (t, b, c, d, s) => { if (s == undefined) s = 1.70158; if ((t /= d / 2) < 1) return c / 2 * (t * t * (((s *= (1.525)) + 1) * t - s)) + b; return c / 2 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2) + b; }, };